Derivative Financial Instruments - Impact of Derivatives on Other Comprehensive Income (Equity) (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments Gain Loss [Line Items]
Total gains (losses) on cash flow hedges		$ 16	$ 194	$ 55
Net changes in cash flow hedges, net of tax	[1]	(68)	220	141
Interest Expense [Member]
Derivative Instruments Gain Loss [Line Items]
Reclassification adjustments for derivative (gains) losses included in net income (interest expense)		$ (84)	$ 26	$ 86

[1] See “Note 7 — Derivative Financial Instruments.”