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Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Schedule of minimum required payments for unconditional purchase obligations | The minimum required payments for unconditional purchase obligations are as follows:
Year Ended December 31, |  |  | Unconditional Purchase Obligations
(in millions) |  |  |
2021 |  |  | $ | 127 |
2022 |  |  | 83 |
2023 |  |  | 81 |
2024 |  |  | 77 |
2025 |  |  | 73 |
Thereafter |  |  | 325 |
|  |  | $ | 766 |

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- Definition Tabular disclosure of unconditional purchase obligation not recognized as liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 440 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121559207&loc=d3e25336-109308 + Details
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