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Reconciliation of Current Period Changes, Net of Applicable Income Taxes, for Derivatives Qualifying as Hedges (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Derivative Instruments [Abstract]        
Beginning balance $ 849 $ 1,274 $ 1,010 $ 1,200
Current period increases (decreases) in fair value, net of deferred taxes of $23, $23, $56 and $(8) (85) (83) (210) 31
Reclassification to net (income), net of deferred taxes of $18, $21, $38 and $42 (34) (37) (70) (77)
Ending balance $ 730 $ 1,154 $ 730 $ 1,154