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Fair Value Measurements - Difference between fair values fair value option (Details) - Fair Value Option - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions    
Fair Value $ 1,664 $ 1,871
Outstanding Principal Amount 1,404 1,405
Difference $ 260 $ 466