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Leases - Schedule Of Maturities Of Lease Liabilities (Detail) $ in Millions	Sep. 30, 2020 USD ($)
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
2020 (Excludes nine months ended September 30, 2020)	$ 42
2021	152
2022	130
2023	97
2024	76
Thereafter	220
Total lease payments	717
Less: imputed interest	(101)
Present value of lease liabilities	616
Finance Lease, Liability, Payment, Due [Abstract]
2020 (Excludes nine months ended September 30, 2020)	1
2021	4
2022	3
2023	1
2024	0
Thereafter	0
Total lease payments	9
Less: imputed interest	0
Present value of lease liabilities	$ 9

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