Quarterly report pursuant to Section 13 or 15(d)

Assets And Liabilities Measured At Fair Value (Details 1)

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Assets And Liabilities Measured At Fair Value (Details 1) - USD ($)
 3 Months Ended 6 Months Ended 10 Months Ended 13 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Sep. 30, 2015
Oct. 17, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Realized and unrealized gains (losses) on financial instruments, net $ 40,000,000 $ 25,000,000 $ 12,000,000 $ (40,000,000)      
1.375% Cash Convertible Senior Notes due 2023              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Debt face amount             $ 1,000,000,000
1.375% Cash Convertible Senior Notes due 2023 | Level 2              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Debt face amount             $ 1,000,000,000
Fair Value Option Securities              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Realized and unrealized gains (losses) on financial instruments, net 9,000,000 78,000,000 (22,000,000) 63,000,000      
Convertible Notes Payable              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Realized and unrealized gains (losses) on financial instruments, net 49,000,000 (82,000,000) 49,000,000 (23,000,000)      
1.375% Convertible Notes Bond Hedge Transaction              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Realized and unrealized gains (losses) on financial instruments, net (46,000,000) 4,000,000 (38,000,000) (88,000,000)      
Other Financial Instruments              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Realized and unrealized gains (losses) on financial instruments, net $ 28,000,000 $ 25,000,000 $ 23,000,000 $ 8,000,000      
Forward Contracts | Live Nation              
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]              
Maximum shares to be purchased           15,900,000  
Counterparty shares acquired         11,200,000    
Weighted average stock price shares purchased by counterparty         23.71