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Provision (Benefit) for Income Taxes (Tables)
3 Months Ended
Mar. 31, 2023
Income Tax Disclosure [Abstract]  
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]
Three Months Ended 
March 31,
20232022
(Millions)
Current:
Federal$$
State— 
Deferred:
Federal237 94 
State46 21 
283 115 
Provision (benefit) for income taxes$284 $118