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Derivative Financial Instruments - Impact of Derivatives on Other Comprehensive Income (Equity) (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Derivative Instruments Gain Loss [Line Items]        
Total gains (losses) on cash flow hedges $ 52 $ (1) $ 179 $ 21
Net changes in cash flow hedges, net of tax [1] 54 20 217 85
Interest Expense [Member]        
Derivative Instruments Gain Loss [Line Items]        
Reclassification adjustments for derivative (gains) losses included in net income (interest expense) $ 2 $ 21 $ 38 $ 64
[1] See “Note 4 – Derivative Financial Instruments.”