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v3.26.1

Derivatives - Fair Value and Classification (Details) - USD ($) $ in Millions | Jun. 30, 2026 | Dec. 31, 2025
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Total assets | $ 375 | $ 281
Total liabilities | 220 | 256
Interest rate swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:AccruedLiabilitiesCurrent |  |
Derivatives, Fair Value [Line Items] |  |
Total liabilities | 8 | 32
Interest rate swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:DerivativeAssetsCurrent |  |
Derivatives, Fair Value [Line Items] |  |
Total assets | 31 | 36
Interest rate swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:DerivativeAssetsNoncurrent |  |
Derivatives, Fair Value [Line Items] |  |
Total assets | 263 | 203
Interest rate swaps | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent |  |
Derivatives, Fair Value [Line Items] |  |
Total liabilities | 27 | 63
Natural gas supply contracts | Location, Statement of Financial Position, Balance [Axis]: us-gaap:AccruedLiabilitiesCurrent |  |
Derivatives, Fair Value [Line Items] |  |
Total liabilities | 71 | 72
Natural gas supply contracts | Location, Statement of Financial Position, Balance [Axis]: us-gaap:DerivativeAssetsCurrent |  |
Derivatives, Fair Value [Line Items] |  |
Total assets | 66 | 29
Natural gas supply contracts | Location, Statement of Financial Position, Balance [Axis]: us-gaap:DerivativeAssetsNoncurrent |  |
Derivatives, Fair Value [Line Items] |  |
Total assets | 15 | 13
Natural gas supply contracts | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherLiabilitiesNoncurrent |  |
Derivatives, Fair Value [Line Items] |  |
Total liabilities | $ 114 | $ 89

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- Definition Fair value, after effect of master netting arrangement and deduction of obligation to return financial collateral not offset and financial instrument subject to master netting arrangement not offset, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Excludes derivative not subject to master netting arrangement or similar agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-7A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-20 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-15 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 + Details
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- Definition Fair value, after effect of master netting arrangement and deduction of obligation to return financial collateral not offset and financial instrument subject to master netting arrangement not offset, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Excludes derivative not subject to master netting arrangement or similar agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 7A -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-7A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 20 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-20 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 15 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483444/210-20-55-15 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (e) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483466/210-20-50-3 + Details
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