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Commitments (Tables) | 12 Months Ended
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Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract] |
Schedule of commitments and contingencies | A schedule of future minimum long-term purchase commitments, based on expected market prices as of December 31, 2020 is as follows:
(in millions) | Purchase Commitments
2021 | $ | 2,191.8 |
2022 | 566.3 |
2023 | 368.3 |
2024 | 301.1 |
2025 | 248.3 |
Subsequent years | 1,418.8 |
| $ | 5,094.6 |

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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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