Derivative Financial Instruments - Impact of Derivatives on Other Comprehensive Income (Equity) (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Derivative Instruments Gain Loss [Line Items]
Total gains (losses) on cash flow hedges		$ 1	$ 18	$ 4	$ 15
Net changes in cash flow hedges, net of tax	[1]	(5)	(1)	(9)	(22)
Interest Expense [Member]
Derivative Instruments Gain Loss [Line Items]
Reclassification adjustments for derivative (gains) losses included in net income (interest expense)		$ (6)	$ (19)	$ (13)	$ (37)

[1] See “Note 4 – Derivative Financial Instruments.”