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Leases (Narrative) (Details) - Construction and transportation of natural gas pipelines - Piedmont - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
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Lessee, Lease, Description [Line Items] |  |
Net investment in lease, current | $ 3 | $ 2
Net investment in lease, noncurrent | $ 194 | $ 197

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- Definition Amount, before allowance for credit loss, of net investment in sales-type and direct financing leases, classified as noncurrent. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479344/326-20-45-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479016/842-30-45-1 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 30 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479016/842-30-45-2 + Details
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