Annual report pursuant to Section 13 and 15(d)

Assets And Liabilities Measured At Fair Value - Realized and Unrealized Gains (Losses) on Financial Instruments (Details)

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Assets And Liabilities Measured At Fair Value - Realized and Unrealized Gains (Losses) on Financial Instruments (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Assets and Liabilities Measured at Fair Value      
Realized and unrealized gains (losses) on financial instruments, net $ (451) $ (402) $ (315)
Debt and equity securities      
Assets and Liabilities Measured at Fair Value      
Realized and unrealized gains (losses) on financial instruments, net 204 (74) 110
Debt measured at fair value      
Assets and Liabilities Measured at Fair Value      
Realized and unrealized gains (losses) on financial instruments, net (886) (114) (584)
Gain (loss) on changes in fair value (107) 148 (16)
Cumulative amount of gain in changes in fair value 68    
Change in fair value of bond hedges | Level 2      
Assets and Liabilities Measured at Fair Value      
Realized and unrealized gains (losses) on financial instruments, net 193 (127) 215
Other      
Assets and Liabilities Measured at Fair Value      
Realized and unrealized gains (losses) on financial instruments, net $ 38 $ (87) $ (56)