| Financial Information for Tracking Stock Groups - Statement of Cash Flows (Details) - USD ($)$ in Millions
 | 3 Months Ended | 12 Months Ended | 
| Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014 | 
| Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Net earnings (loss) | $ 186 | $ 169 | $ 142 | $ 427 | $ 89 | $ 41 | $ 99 | $ 19 | $ 924 | $ 248 | $ 395 | 
| Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] |  |  |  |  |  |  |  |  |  |  |  | 
| Depreciation and amortization |  |  |  |  |  |  |  |  | 354 | 362 | 359 | 
| Stock-based compensation |  |  |  |  |  |  |  |  | 150 | 204 | 217 | 
| Share of (earnings) loss of affiliates, net |  |  |  |  |  |  |  |  | (14) | 40 | 113 | 
| Realized and unrealized (gains) losses on financial instruments, net |  |  |  |  |  |  |  |  | (37) | 140 | (38) | 
| Noncash interest expense |  |  |  |  |  |  |  |  | 11 | 6 | (34) | 
| Losses (gains) on dilution of investment in affiliate |  |  |  |  |  |  |  |  |  | 1 | 78 | 
| Gains (Losses) on Extinguishment of Debt |  |  |  |  |  |  |  |  | 24 |  |  | 
| Deferred income tax expense (benefit) |  |  |  |  |  |  |  |  | 427 | 175 | 91 | 
| Other, net |  |  |  |  |  |  |  |  | 30 | 19 | (12) | 
| Changes in operating assets and liabilities |  |  |  |  |  |  |  |  |  |  |  | 
| Current and other assets |  |  |  |  |  |  |  |  | 25 | (208) | (74) | 
| Payables and other current liabilities |  |  |  |  |  |  |  |  | 277 | 245 | 33 | 
| Net cash provided (used) by operating activities |  |  |  |  |  |  |  |  | 2,171 | 1,232 | 1,128 | 
| Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Cash (paid) for acquisitions, net of cash acquired |  |  |  |  |  |  |  |  |  |  | (47) | 
| Cash proceeds from dispositions of investments |  |  |  |  |  |  |  |  | 62 | 175 | 247 | 
| Proceeds (payments) from settlement of financial instruments, net |  |  |  |  |  |  |  |  | (1) | (322) | (72) | 
| Investments in and loans to cost and equity investees |  |  |  |  |  |  |  |  | (784) | (19) | (183) | 
| Repayment of Notes Receivable from Related Parties |  |  |  |  |  |  |  |  | 48 |  | 42 | 
| Capital expended for property and equipment |  |  |  |  |  |  |  |  | (568) | (296) | (194) | 
| Purchases of short term investments and other marketable securities |  |  |  |  |  |  |  |  | (258) | (174) | (360) | 
| Sales of short term investments and other marketable securities |  |  |  |  |  |  |  |  | 273 | 358 | 176 | 
| Other investing activities, net |  |  |  |  |  |  |  |  | (36) | (8) | (20) | 
| Net cash provided (used) by investing activities |  |  |  |  |  |  |  |  | (1,264) | (286) | (411) | 
| Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  |  | 2,745 | 2,213 | 2,758 | 
| Repayments of debt |  |  |  |  |  |  |  |  | (1,749) | (1,196) | (1,936) | 
| Cash provided by the Broadband Spin-Off |  |  |  |  |  |  |  |  |  |  | 259 | 
| Repurchases of Liberty common stock |  |  |  |  |  |  |  |  |  | (350) |  | 
| Shares repurchased by subsidiary |  |  |  |  |  |  |  |  | (1,674) | (2,018) | (2,157) | 
| Proceeds from Liberty Braves common stock rights offering |  |  |  |  |  |  |  |  | 203 |  |  | 
| Taxes paid in lieu of shares issued for stock-based compensation |  |  |  |  |  |  |  |  | (58) | (80) | (48) | 
| Other financing activities, net |  |  |  |  |  |  |  |  | (13) | 5 |  | 
| Net cash provided (used) by financing activities |  |  |  |  |  |  |  |  | (546) | (1,426) | (1,124) | 
| Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 361 | (480) | (407) | 
| Cash and cash equivalents at beginning of period |  |  |  | 201 |  |  |  | 681 | 201 | 681 | 1,088 | 
| Cash and cash equivalents at end of period | 562 |  |  |  | 201 |  |  |  | 562 | 201 | 681 | 
| Liberty Sirius XM Group |  |  |  |  |  |  |  |  |  |  |  | 
| Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Net earnings (loss) |  |  |  |  |  |  |  |  | 657 | 443 | 448 | 
| Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] |  |  |  |  |  |  |  |  |  |  |  | 
| Depreciation and amortization |  |  |  |  |  |  |  |  | 312 | 322 | 314 | 
| Stock-based compensation |  |  |  |  |  |  |  |  | 128 | 157 | 148 | 
| Share of (earnings) loss of affiliates, net |  |  |  |  |  |  |  |  | (13) | 1 | (5) | 
| Noncash interest expense |  |  |  |  |  |  |  |  | 6 | 6 | (35) | 
| Losses (gains) on dilution of investment in affiliate |  |  |  |  |  |  |  |  |  |  | 2 | 
| Gains (Losses) on Extinguishment of Debt |  |  |  |  |  |  |  |  | 24 |  |  | 
| Deferred income tax expense (benefit) |  |  |  |  |  |  |  |  | 332 | 290 | 284 | 
| Intergroup tax allocation |  |  |  |  |  |  |  |  | (13) | (4) | 30 | 
| Intergroup tax (payments) receipts |  |  |  |  |  |  |  |  | 7 |  |  | 
| Other, net |  |  |  |  |  |  |  |  | 21 | 15 | 19 | 
| Changes in operating assets and liabilities |  |  |  |  |  |  |  |  |  |  |  | 
| Current and other assets |  |  |  |  |  |  |  |  | 59 | (220) | (20) | 
| Payables and other current liabilities |  |  |  |  |  |  |  |  | 184 | 212 | 57 | 
| Net cash provided (used) by operating activities |  |  |  |  |  |  |  |  | 1,704 | 1,222 | 1,242 | 
| Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Cash (paid) for acquisitions, net of cash acquired |  |  |  |  |  |  |  |  |  |  | 2 | 
| Repayment of Notes Receivable from Related Parties |  |  |  |  |  |  |  |  |  |  | 32 | 
| Capital expended for property and equipment |  |  |  |  |  |  |  |  | (206) | (135) | (126) | 
| Other investing activities, net |  |  |  |  |  |  |  |  | (4) |  |  | 
| Net cash provided (used) by investing activities |  |  |  |  |  |  |  |  | (210) | (135) | (92) | 
| Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  |  | 1,847 | 1,978 | 2,658 | 
| Repayments of debt |  |  |  |  |  |  |  |  | (1,471) | (1,038) | (1,266) | 
| Intergroup (payments) receipts |  |  |  |  |  |  |  |  | 58 | 9 | (335) | 
| Shares repurchased by subsidiary |  |  |  |  |  |  |  |  | (1,674) | (2,018) | (2,157) | 
| Taxes paid in lieu of shares issued for stock-based compensation |  |  |  |  |  |  |  |  | (47) | (54) | (37) | 
| Other financing activities, net |  |  |  |  |  |  |  |  | (32) |  |  | 
| Net cash provided (used) by financing activities |  |  |  |  |  |  |  |  | (1,319) | (1,123) | (1,137) | 
| Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 175 | (36) | 13 | 
| Cash and cash equivalents at beginning of period |  |  |  | 112 |  |  |  | 148 | 112 | 148 | 135 | 
| Cash and cash equivalents at end of period | 287 |  |  |  | 112 |  |  |  | 287 | 112 | 148 | 
| Liberty Braves Group |  |  |  |  |  |  |  |  |  |  |  | 
| Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Net earnings (loss) |  |  |  |  |  |  |  |  | (62) | (20) | (24) | 
| Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] |  |  |  |  |  |  |  |  |  |  |  | 
| Depreciation and amortization |  |  |  |  |  |  |  |  | 32 | 31 | 29 | 
| Stock-based compensation |  |  |  |  |  |  |  |  | 9 | 10 | 12 | 
| Share of (earnings) loss of affiliates, net |  |  |  |  |  |  |  |  | (9) | (9) | (10) | 
| Unrealized gains losses on intergroup interest |  |  |  |  |  |  |  |  | 27 |  |  | 
| Realized and unrealized (gains) losses on financial instruments, net |  |  |  |  |  |  |  |  | (1) |  |  | 
| Noncash interest expense |  |  |  |  |  |  |  |  | 5 |  |  | 
| Deferred income tax expense (benefit) |  |  |  |  |  |  |  |  | 1 | (6) | (7) | 
| Intergroup tax allocation |  |  |  |  |  |  |  |  | (19) | (4) | (5) | 
| Intergroup tax (payments) receipts |  |  |  |  |  |  |  |  | 7 | 1 | (10) | 
| Other, net |  |  |  |  |  |  |  |  | 11 |  | (27) | 
| Changes in operating assets and liabilities |  |  |  |  |  |  |  |  |  |  |  | 
| Current and other assets |  |  |  |  |  |  |  |  | (17) | 9 | (53) | 
| Payables and other current liabilities |  |  |  |  |  |  |  |  | 105 | 33 | 11 | 
| Net cash provided (used) by operating activities |  |  |  |  |  |  |  |  | 89 | 45 | (84) | 
| Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Cash proceeds from dispositions of investments |  |  |  |  |  |  |  |  |  | 24 |  | 
| Investments in and loans to cost and equity investees |  |  |  |  |  |  |  |  | (20) |  |  | 
| Repayment of Notes Receivable from Related Parties |  |  |  |  |  |  |  |  |  |  | 10 | 
| Capital expended for property and equipment |  |  |  |  |  |  |  |  | (360) | (128) | (66) | 
| Other investing activities, net |  |  |  |  |  |  |  |  | (33) | (9) | (6) | 
| Net cash provided (used) by investing activities |  |  |  |  |  |  |  |  | (413) | (113) | (62) | 
| Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  |  | 460 | 197 | 100 | 
| Repayments of debt |  |  |  |  |  |  |  |  | (276) | (158) |  | 
| Intergroup (payments) receipts |  |  |  |  |  |  |  |  | 16 | 31 |  | 
| Proceeds from Liberty Braves common stock rights offering |  |  |  |  |  |  |  |  | 203 |  |  | 
| Other financing activities, net |  |  |  |  |  |  |  |  | 15 |  |  | 
| Net cash provided (used) by financing activities |  |  |  |  |  |  |  |  | 418 | 70 | 100 | 
| Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 94 | 2 | (46) | 
| Cash and cash equivalents at beginning of period |  |  |  | 13 |  |  |  | 11 | 13 | 11 | 57 | 
| Cash and cash equivalents at end of period | 107 |  |  |  | 13 |  |  |  | 107 | 13 | 11 | 
| Liberty Formula One Group |  |  |  |  |  |  |  |  |  |  |  | 
| Cash flows from operating activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Net earnings (loss) |  |  |  |  |  |  |  |  | 329 | (175) | (29) | 
| Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] |  |  |  |  |  |  |  |  |  |  |  | 
| Depreciation and amortization |  |  |  |  |  |  |  |  | 10 | 9 | 16 | 
| Stock-based compensation |  |  |  |  |  |  |  |  | 13 | 37 | 57 | 
| Share of (earnings) loss of affiliates, net |  |  |  |  |  |  |  |  | 8 | 48 | 128 | 
| Unrealized gains losses on intergroup interest |  |  |  |  |  |  |  |  | (27) |  |  | 
| Realized and unrealized (gains) losses on financial instruments, net |  |  |  |  |  |  |  |  | (36) | 140 | (38) | 
| Noncash interest expense |  |  |  |  |  |  |  |  |  |  | 1 | 
| Losses (gains) on dilution of investment in affiliate |  |  |  |  |  |  |  |  |  | 1 | 76 | 
| Deferred income tax expense (benefit) |  |  |  |  |  |  |  |  | 94 | (109) | (186) | 
| Intergroup tax allocation |  |  |  |  |  |  |  |  | 32 | 8 | (25) | 
| Intergroup tax (payments) receipts |  |  |  |  |  |  |  |  | (14) | (1) | 10 | 
| Other, net |  |  |  |  |  |  |  |  | (2) | 4 | (4) | 
| Changes in operating assets and liabilities |  |  |  |  |  |  |  |  |  |  |  | 
| Current and other assets |  |  |  |  |  |  |  |  | (17) | 3 | (1) | 
| Payables and other current liabilities |  |  |  |  |  |  |  |  | (12) |  | (35) | 
| Net cash provided (used) by operating activities |  |  |  |  |  |  |  |  | 378 | (35) | (30) | 
| Cash flows from investing activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Cash (paid) for acquisitions, net of cash acquired |  |  |  |  |  |  |  |  |  |  | (49) | 
| Cash proceeds from dispositions of investments |  |  |  |  |  |  |  |  | 62 | 151 | 247 | 
| Proceeds (payments) from settlement of financial instruments, net |  |  |  |  |  |  |  |  | (1) | (322) | (72) | 
| Investments in and loans to cost and equity investees |  |  |  |  |  |  |  |  | (764) | (19) | (183) | 
| Repayment of Notes Receivable from Related Parties |  |  |  |  |  |  |  |  | 48 |  |  | 
| Capital expended for property and equipment |  |  |  |  |  |  |  |  | (2) | (33) | (2) | 
| Purchases of short term investments and other marketable securities |  |  |  |  |  |  |  |  | (258) | (174) | (360) | 
| Sales of short term investments and other marketable securities |  |  |  |  |  |  |  |  | 273 | 358 | 176 | 
| Other investing activities, net |  |  |  |  |  |  |  |  | 1 | 1 | (14) | 
| Net cash provided (used) by investing activities |  |  |  |  |  |  |  |  | (641) | (38) | (257) | 
| Cash flows from financing activities: |  |  |  |  |  |  |  |  |  |  |  | 
| Borrowings of debt |  |  |  |  |  |  |  |  | 438 | 38 |  | 
| Repayments of debt |  |  |  |  |  |  |  |  | (2) |  | (670) | 
| Intergroup (payments) receipts |  |  |  |  |  |  |  |  | (74) | (40) | 335 | 
| Cash provided by the Broadband Spin-Off |  |  |  |  |  |  |  |  |  |  | 259 | 
| Repurchases of Liberty common stock |  |  |  |  |  |  |  |  |  | (350) |  | 
| Taxes paid in lieu of shares issued for stock-based compensation |  |  |  |  |  |  |  |  | (11) | (26) | (11) | 
| Other financing activities, net |  |  |  |  |  |  |  |  | 4 | 5 |  | 
| Net cash provided (used) by financing activities |  |  |  |  |  |  |  |  | 355 | (373) | (87) | 
| Net increase (decrease) in cash and cash equivalents |  |  |  |  |  |  |  |  | 92 | (446) | (374) | 
| Cash and cash equivalents at beginning of period |  |  |  | $ 76 |  |  |  | $ 522 | 76 | 522 | 896 | 
| Cash and cash equivalents at end of period | $ 168 |  |  |  | $ 76 |  |  |  | $ 168 | $ 76 | $ 522 |