v3.26.1
Fair Value - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Gross Asset $ 10 $ 17
Liability 52 47
Fair Value, Recurring [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets, Fair Value Disclosure, Total 60 66
Financial Liabilities Fair Value Disclosure 35 28
Counterparty and Cash Collateral Netting, Assets [1] (5) (9)
Counterparty and Cash Collateral Netting, Liabilities [1] (17) (19)
Fair Value, Recurring [Member] | Fixed Income Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Deferred compensation assets: [2] 2 2
Fair Value, Recurring [Member] | Equity Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity investments 46 49
Deferred compensation assets: [2] 7 7
Fair Value, Recurring [Member] | Energy Commodity Derivatives [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Counterparty and Cash Collateral Netting, Assets [1] (5) (9) [3]
Derivative Asset 5 8
Counterparty and Cash Collateral Netting, Liabilities [1],[3] (17) (19)
Derivative Liability [3] 35 28
Fair Value, Recurring [Member] | Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets, Fair Value Disclosure, Total 9 9
Fair Value, Recurring [Member] | Level 1 [Member] | Fixed Income Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Deferred compensation assets: [2] 2 2
Fair Value, Recurring [Member] | Level 1 [Member] | Equity Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Deferred compensation assets: [2] 7 7
Fair Value, Recurring [Member] | Level 2 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets, Fair Value Disclosure, Total 10 17
Financial Liabilities Fair Value Disclosure 44 37
Fair Value, Recurring [Member] | Level 2 [Member] | Energy Commodity Derivatives [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Gross Asset 10 17
Liability [3] 44 37
Fair Value, Recurring [Member] | Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity investments 46  
Assets, Fair Value Disclosure, Total 46 49
Financial Liabilities Fair Value Disclosure 8 10
Fair Value, Recurring [Member] | Level 3 [Member] | Equity Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity investments 46 49
Fair Value, Recurring [Member] | Level 3 [Member] | Energy Commodity Derivatives [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Liability [3] $ 8 $ 10
[1] The Company is permitted to net derivative assets and derivative liabilities with the same counterparty when a legally enforceable master netting agreement exists. In addition, the Company nets derivative assets and derivative liabilities against any payables and receivables for cash collateral held or placed with these same counterparties.
[2] Included in other property and investments-net and other non-current assets on the Condensed Consolidated Balance Sheets.
[3] The Level 3 energy commodity derivative balances are associated with a natural gas exchange agreement.