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Income Taxes - Components of Deferred Income Tax (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Deferred tax assets    
Net operating loss (NOL) carryforwards $ 142 $ 132
Lease liabilities 238 239
Contract liabilities 58 59
Interest expense carryforwards 125 99
Asset retirement obligation 84 78
Other 65 62
Total deferred tax assets 712 669
Less valuation allowance (181) (146)
Net deferred tax assets 531 523
Deferred tax liabilities    
Property, plant and equipment 389 434
Licenses/intangibles 421 408
Partnership investments 191 180
Lease assets 224 221
Other 34 35
Total deferred tax liabilities 1,259 1,278
Net deferred income tax liability $ 728 $ 755