XML 126 R104.htm IDEA: XBRL DOCUMENT v3.25.0.1
Income Taxes - Components (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Current income tax expense:      
State income tax $ 2 $ 2 $ 1
Canadian federal and provincial income and withholding taxes 193 143 83
Total current income tax expense 195 145 84
Deferred income tax expense/(benefit):      
Federal income tax 31 55 46
State income tax 6 13 11
Canadian federal and provincial income tax (28) (24) 105
Total deferred income tax expense 9 44 162
Total income tax expense $ 204 $ 189 $ 246