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Loans Payable, Long-Term Debt and Leases - Maturity Schedule (Details)
$ in Millions
Dec. 31, 2019
USD ($)
Leases [Abstract]  
2020 $ 264
2021 200
2022 168
2023 113
2024 89
Thereafter 297
Total lease payments 1,131
Less: imputed interest 127
Total operating lease liability $ 1,004