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Leases - Schedule of Company's Lease Liabilities' Maturities For Next Five Years and Thereafter (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Operating Leases
2021	$ 69
2022	52
2023	37
2024	30
2025	24
Thereafter	94
Total lease payments	306
Less: Imputed interest	55
Present value of lease liabilities	251
Finance Leases
2021	12
2022	11
2023	11
2024	11
2025	11
Thereafter	35
Total lease payments	91
Less: Imputed interest	17
Present value of lease liabilities	74	$ 59
Operating and Finance Leases, Total
2021	81
2022	63
2023	48
2024	41
2025	35
Thereafter	129
Total lease payments	397
Less: Imputed interest	72
Present value of lease liabilities	$ 325

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