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, 2022
Dec. 31, 2021
Dec. 31, 2020
Assets and Liabilities Measured at Fair Value      
Realized and unrealized gains (losses) on financial instruments, net $ 599 $ (451) $ (402)
Debt and equity securities      
Assets and Liabilities Measured at Fair Value      
Realized and unrealized gains (losses) on financial instruments, net (7) 204 (74)
Debt measured at fair value      
Assets and Liabilities Measured at Fair Value      
Realized and unrealized gains (losses) on financial instruments, net 717 (886) (114)
Gain (loss) on changes in fair value (4) (107) 148
Cumulative amount of gain in changes in fair value 64    
Change in fair value of bond hedges      
Assets and Liabilities Measured at Fair Value      
Realized and unrealized gains (losses) on financial instruments, net (236) 193 (127)
Other      
Assets and Liabilities Measured at Fair Value      
Realized and unrealized gains (losses) on financial instruments, net $ 125 $ 38 $ (87)