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Leases and Capacity Purchase Agreements (Tables) | 12 Months Ended
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Dec. 31, 2020
Leases [Abstract] |
Components of Lease Cost | The Company's lease cost for the years ended December 31 included the following components (in millions):
|  | 2020 |  | 2019 |  | 2018 |  |
Operating lease cost |  | $ | 933 |  |  | $ | 1,038 |  |  | $ | 1,213 |  |  |
Variable and short-term lease cost |  | 1,968 |  |  | 2,548 |  |  | 2,569 |  |  |
Amortization of finance lease assets |  | 88 |  |  | 68 |  |  | 75 |  |  |
Interest on finance lease liabilities |  | 16 |  |  | 85 |  |  | 44 |  |  |
Sublease income |  | (23) |  |  | (32) |  |  | (38) |  |  |
Total lease cost |  | $ | 2,982 |  |  | $ | 3,707 |  |  | $ | 3,863 |  |  |
Summary of Scheduled Future Minimum Lease Payments under Operating Leases | The table below summarizes the Company's scheduled future minimum lease payments under operating and finance leases, recorded on the balance sheet, as of December 31, 2020 (in millions):
|  | Operating Leases |  | Finance Leases
2021 |  | $ | 847 |  |  | $ | 198 |
2022 |  | 693 |  |  | 59 |
2023 |  | 723 |  |  | 51 |
2024 |  | 704 |  |  | 47 |
2025 |  | 585 |  |  | 35 |
After 2025 |  | 3,979 |  |  | 64 |
Minimum lease payments |  | 7,531 |  |  | 454 |
Imputed interest |  | (1,933) |  |  | (48) |
Present value of minimum lease payments |  | 5,598 |  |  | 406 |
Less: current maturities of lease obligations |  | (612) |  |  | (182) |
Long-term lease obligations |  | $ | 4,986 |  |  | $ | 224 |
Summary of Scheduled Future Minimum Lease Payments under Finance Leases | The table below summarizes the Company's scheduled future minimum lease payments under operating and finance leases, recorded on the balance sheet, as of December 31, 2020 (in millions):
|  | Operating Leases |  | Finance Leases
2021 |  | $ | 847 |  |  | $ | 198 |
2022 |  | 693 |  |  | 59 |
2023 |  | 723 |  |  | 51 |
2024 |  | 704 |  |  | 47 |
2025 |  | 585 |  |  | 35 |
After 2025 |  | 3,979 |  |  | 64 |
Minimum lease payments |  | 7,531 |  |  | 454 |
Imputed interest |  | (1,933) |  |  | (48) |
Present value of minimum lease payments |  | 5,598 |  |  | 406 |
Less: current maturities of lease obligations |  | (612) |  |  | (182) |
Long-term lease obligations |  | $ | 4,986 |  |  | $ | 224 |
Additional Information Related to Leases | The table below presents additional information related to our leases as of December 31:
|  | 2020 |  | 2019 |
Weighted-average remaining lease term - operating leases |  | 11 years |  | 11 years |
Weighted-average remaining lease term - finance leases |  | 4 years |  | 6 years |
Weighted-average discount rate - operating leases |  | 5.1 | % |  | 5.2 | % |
Weighted-average discount rate - finance leases |  | 4.4 | % |  | 5.7 | % |
Supplemental Cash Flow Information Related to Leases | The table below presents supplemental cash flow information related to leases during the year ended December 31 (in millions):
| 2020 |  | 2019 |  | 2018
Cash paid for amounts included in the measurement of lease liabilities: |  |  |  |  |
Operating cash flows for operating leases | $ | 788 |  |  | $ | 902 |  |  | $ | 1,078 |
Operating cash flows for finance leases | 20 |  |  | 70 |  |  | 53 |
Financing cash flows for finance leases | 66 |  |  | 151 |  |  | 79 |
Future Lease Payment Under Terms of Capacity Purchase Agreement | Based on these assumptions as of December 31, 2020, our future payments through the end of the terms of our CPAs are presented in the table below (in billions):
2021 | $ | 1.8 |
2022 | 1.8 |
2023 | 1.7 |
2024 | 1.5 |
2025 | 1.2 |
After 2025 | 3.1 |
| $ | 11.1 |

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- Definition Tabular disclosure of undiscounted cash flows of finance lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to finance lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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- Definition Tabular disclosure of lessee's lease cost. Includes, but is not limited to, interest expense for finance lease, amortization of right-of-use asset for finance lease, operating lease cost, short-term lease cost, variable lease cost and sublease income. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 + Details
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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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