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Fair Value - Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Gross Asset $ 24 $ 36
Liability 64 100
Fair Value, Recurring [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets, Fair Value Disclosure 73 70
Financial Liabilities Fair Value Disclosure 27 35
Counterparty and Cash Collateral Netting, Assets [1] (13) (23)
Counterparty and Cash Collateral Netting, Liabilities [1] (37) (65)
Fair Value, Recurring [Member] | Fixed Income Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Deferred compensation assets: [2] 2 1
Fair Value, Recurring [Member] | Equity Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity investments [2] 53 50
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],[3] (13) (23)
Derivative Asset [3] 10 8
Counterparty and Cash Collateral Netting, Liabilities [1],[3] (37) (65)
Derivative Liability [3] 27 35
Fair Value, Recurring [Member] | Interest Rate Swap [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Derivative Asset 1 4
Fair Value, Recurring [Member] | Level 1 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Assets, Fair Value Disclosure 9 8
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 1
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 24 35
Financial Liabilities Fair Value Disclosure 61 92
Fair Value, Recurring [Member] | Level 2 [Member] | Energy Commodity Derivatives [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Gross Asset [3] 23 31
Liability [3] 61 92
Fair Value, Recurring [Member] | Level 2 [Member] | Interest Rate Swap [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Gross Asset 1 4
Fair Value, Recurring [Member] | Level 3 [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity investments 53  
Assets, Fair Value Disclosure 53 50
Financial Liabilities Fair Value Disclosure 3 8
Fair Value, Recurring [Member] | Level 3 [Member] | Equity Funds [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity investments [2] 53 50
Fair Value, Recurring [Member] | Level 3 [Member] | Energy Commodity Derivatives [Member]    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Liability [3] $ 3 $ 8
[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 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 Consolidated Balance Sheets.
[3] The Level 3 energy commodity derivative balances are associated with a natural gas exchange agreement.