Fair Value - Financial Instruments Carried at Fair Value on Recurring Basis (Detail) - USD ($) $ in Millions	Jun. 30, 2020	Dec. 31, 2019
Assets:
Derivatives	$ 187	$ 92
Mutual funds	46	3
Total	233	95
Liabilities:
Derivatives	16
Total	16
Level 1
Assets:
Derivatives	0	0
Mutual funds	46	3
Total	46	3
Liabilities:
Derivatives	0
Total	0
Level 2
Assets:
Derivatives	187	92
Mutual funds	0	0
Total	187	$ 92
Liabilities:
Derivatives	16
Total	$ 16