Leases - Schedule of Annual Maturities of Lease Liabilities (Detail) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Leases, October 1, 2021 to December 31, 2021	$ 16
Operating Leases, 2022	55
Operating Leases, 2023	41
Operating Leases, 2024	26
Operating Leases, 2025	15
Operating Leases, 2026	11
Operating Leases, Thereafter	46
Operating Leases, Total lease payments	210
Operating Leases, Less imputed interest	(16)
Operating Leases, Total	194	$ 190
Finance Leases, October 1, 2021 to December 31, 2021	12
Finance Leases, 2022	35
Finance Leases, 2023	26
Finance Leases, 2024	9
Finance Leases, 2025	1
Finance Leases, Total lease payments	83
Finance Leases, Less imputed interest	(3)
Finance Leases, Total	$ 80	$ 98