Leases - Maturity Profile of Lease Obligations (Detail) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Operating Leases
2022	$ 87
2023	75
2024	69
2025	64
2026	49
Remaining years	219
Total lease payments	563
Less: Imputed interest	(99)
Total lease obligations	464	$ 541
Finance Leases
2022	36
2023	36
2024	36
2025	36
2026	31
Remaining years	145
Total lease payments	320
Less: Imputed interest	(101)
Total lease obligations	$ 219	$ 238