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Commitments and Contingencies - Unconditional Purchase Obligations (Details) $ in Millions | Dec. 31, 2020 USD ($)
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Minimum future commitments for purchase obligations |
Total Amounts Committed | $ 10,979.4
2021 | 1,179.6
2022 | 1,111.0
2023 | 1,016.1
2024 | 821.5
2025 | 792.1
Later Years | 6,059.1
Nuclear | Electric |
Minimum future commitments for purchase obligations |
Total Amounts Committed | 7,843.9
2021 | 501.1
2022 | 531.2
2023 | 563.1
2024 | 596.8
2025 | 632.6
Later Years | 5,019.1
Coal supply and transportation | Electric |
Minimum future commitments for purchase obligations |
Total Amounts Committed | 600.1
2021 | 257.8
2022 | 190.6
2023 | 151.0
2024 | 0.7
2025 | 0.0
Later Years | 0.0
Purchased power | Electric |
Minimum future commitments for purchase obligations |
Total Amounts Committed | 339.7
2021 | 58.2
2022 | 51.6
2023 | 46.5
2024 | 43.4
2025 | 44.6
Later Years | 95.4
Supply and transportation | Natural gas |
Minimum future commitments for purchase obligations |
Total Amounts Committed | 1,805.8
2021 | 337.4
2022 | 318.1
2023 | 236.7
2024 | 162.5
2025 | 96.4
Later Years | 654.7
Non-Utility Energy Infrastructure | Purchased power | Electric |
Minimum future commitments for purchase obligations |
Total Amounts Committed | 380.1
2021 | 18.4
2022 | 18.2
2023 | 18.0
2024 | 18.1
2025 | 18.5
Later Years | 288.9
Non-Utility Energy Infrastructure | Natural gas storage and transportation | Natural gas |
Minimum future commitments for purchase obligations |
Total Amounts Committed | 9.8
2021 | 6.7
2022 | 1.3
2023 | 0.8
2024 | 0.0
2025 | 0.0
Later Years | $ 1.0

X
- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of purchase arrangement to be paid after fifth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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X
- Definition Amount of purchase arrangement to be paid in fifth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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X
- Definition Amount of purchase arrangement to be paid in fourth fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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X
- Definition Amount of purchase arrangement to be paid in next fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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Period Type: | instant

X
- Definition Amount of purchase arrangement to be paid in second fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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X
- Definition Amount of purchase arrangement to be paid in third fiscal year following current fiscal year. Includes, but is not limited to, recorded and unrecorded purchase obligations, long-term purchase commitment, and short-term purchase commitment. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach). + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- References No definition available. + Details
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