Indebtedness - Summary of Components of Interest as Presented in Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Debt Disclosure [Abstract]
Income	$ 1		$ 3	$ 4	$ 7
Expense on borrowings	(41)		(48)	(82)	(79)
Income (expense) on UTPs and other tax related liabilities	(5)		(10)	30	(18)
Net periodic pension costs - interest component	(4)		(5)	(8)	(10)
Interest expense, net	(49)		(60)	(56)	(100)
Interest paid	$ 13		$ 23	86	$ 72
Interest accrued on UTPs		$ 40		$ 40