Derivatives - Schedule of Pretax Effects of Derivative Financial Instruments Designated or Previously Designated as Effective Hedges (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in OCI	$ 56	$ (7)
Gain (loss) reclassified from AOCL to income	(1)	4
Interest rate swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in OCI	0	0
Gain (loss) reclassified from AOCL to income	(2)	(2)
Foreign currency contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in OCI	35	(6)
Gain (loss) reclassified from AOCL to income	1	6
Commodity contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in OCI	0	(1)
Gain (loss) reclassified from AOCL to income	0	0
Cross-currency swaps
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in OCI	21	0
Gain (loss) reclassified from AOCL to income	$ 0	$ 0