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Commitments and Contingencies - Contractual Obligation, Fiscal Year Maturity (Details) $ in Millions | Dec. 31, 2023 USD ($)
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Long-Term Service and Maintenance Contracts |
Long-term Purchase Commitment [Line Items] |
2024 | $ 286
2025 | 242
2026 | 228
2027 | 250
2028 | 310
Thereafter | 2,091
Total | 3,407
Coal transportation agreements |
Long-term Purchase Commitment [Line Items] |
2024 | 33
2025 | 34
2026 | 35
2027 | 36
2028 | 0
Thereafter | 0
Total | 138
Pipeline transportation and storage reservation fees |
Long-term Purchase Commitment [Line Items] |
2024 | 179
2025 | 182
2026 | 192
2027 | 195
2028 | 194
Thereafter | 96
Total | 1,038
Water Contracts |
Long-term Purchase Commitment [Line Items] |
2024 | 9
2025 | 9
2026 | 9
2027 | 9
2028 | 9
Thereafter | 44
Total | $ 89

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- Definition Amount of contractual obligation, including, but not limited to, long-term debt, lease obligation, purchase obligation, and other commitments. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 235 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 3 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480678/235-10-S99-3 + Details
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Period Type: | instant

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- Definition Amount of contractual obligation to be paid after fifth fiscal year following current fiscal year. 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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- Definition Amount of contractual obligation to be paid in fifth fiscal year following current fiscal year. 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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- Definition Amount of contractual obligation to be paid in fourth fiscal year following current fiscal year. 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 contractual obligation to be paid in next fiscal year following current fiscal year. 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 contractual obligation to be paid in second fiscal year following current fiscal year. 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 contractual obligation to be paid in third fiscal year following current fiscal year. 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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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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- Details
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- Details
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- Details
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