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Loans Payable, Long-Term Debt and Leases - Maturity Schedule (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Debt Disclosure [Abstract]    
2022 $ 336  
2023 292  
2024 242  
2025 178  
2026 146  
Thereafter 511  
Total lease payments 1,705  
Less: Imputed interest 176  
Total operating lease liability $ 1,529 $ 1,626