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Annual report pursuant to Section 13 and 15(d)

Assets and Liabilities Measured at Fair Value - Realized and Unrealized Gains (Losses) (Details)

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Assets and Liabilities Measured at Fair Value - Realized and Unrealized Gains (Losses) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Realized and unrealized gains (losses) on financial instruments Ìý Ìý Ìý
Realized and unrealized gains (losses) on financial instruments, net $ (110) $ (251) $ 76
Change in fair value of exchangeable senior debentures realized gain 21 1 70
Cumulative amount of gain (loss) in change in fair value 193 Ìý Ìý
Equity securities Ìý Ìý Ìý
Realized and unrealized gains (losses) on financial instruments Ìý Ìý Ìý
Realized and unrealized gains (losses) on financial instruments, net (1) (22) 155
Exchangeable senior debentures Ìý Ìý Ìý
Realized and unrealized gains (losses) on financial instruments Ìý Ìý Ìý
Realized and unrealized gains (losses) on financial instruments, net (277) (337) (3)
Indemnification asset Ìý Ìý Ìý
Realized and unrealized gains (losses) on financial instruments Ìý Ìý Ìý
Realized and unrealized gains (losses) on financial instruments, net 143 123 (70)
Other Financial Instruments Ìý Ìý Ìý
Realized and unrealized gains (losses) on financial instruments Ìý Ìý Ìý
Realized and unrealized gains (losses) on financial instruments, net $ 25 $ (15) $ (6)