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Commitments and Contingencies - Principal Contractual Commitments Excluding Open Orders (Details) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Long-term debt principal and interest    
2021 $ 1,876  
2022 2,606  
2023 3,331  
2024 4,272  
2025 3,058  
Thereafter 35,680  
Total 50,823  
Operating lease liabilities    
2021 4,284  
2022 5,507  
2023 5,043  
2024 4,620  
2025 4,202  
Thereafter 23,106  
Total operating lease liabilities 46,762 $ 44,833
Finance lease liabilities, including interest    
2021 7,520  
2022 7,700  
2023 3,952  
2024 1,555  
2025 1,066  
Thereafter 6,894  
Total finance lease liabilities 28,687 30,437
Financing obligations, including interest    
2021 169  
2022 245  
2023 250  
2024 253  
2025 257  
Thereafter 4,067  
Total 5,241  
Leases not yet commenced    
2021 950  
2022 2,149  
2023 2,325  
2024 2,490  
2025 2,513  
Thereafter 27,980  
Total 38,407  
Unconditional purchase obligations    
2021 2,407  
2022 3,847  
2023 4,612  
2024 4,359  
2025 4,134  
Thereafter 13,576  
Total 32,935  
Other commitments    
2021 3,265  
2022 2,665  
2023 1,163  
2024 927  
2025 807  
Thereafter 9,881  
Total 18,708  
Total commitments    
2021 20,471  
2022 24,719  
2023 20,676  
2024 18,476  
2025 16,037  
Thereafter 121,184  
Total 221,563  
Accrued tax contingencies $ 3,000 $ 2,800