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Derivatives - Cash Flow Hedges (Details) - Cash flow hedge - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Derivatives in Cash Flow Hedging Relationships
Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges	$ (8)		$ (8)
After-tax net unrealized gain (loss) anticipated to be reclassified from AOCI to the income statement within next twelve months			75
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivative	72	$ 128	78	$ 134
Interest rate swap and treasury lock in aggregate
Derivatives in Cash Flow Hedging Relationships
Accumulated other comprehensive income (loss), unrealized gain (loss) on cash flow hedges	(90)		(90)
Foreign currency forward/option contracts
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivative	72	128	78	134
Interest rate contracts
Derivatives in Cash Flow Hedging Relationships
Pretax Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivative	$ 0	$ 0	$ 0	$ 0