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Income Taxes - MidAmerican Funding - Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Current:      
Federal $ (1,463) $ (1,701) $ (1,537)
State (65) (177) (121)
Total current (1,449) (1,778) (1,572)
Deferred:      
Federal (408) 1,037 1,438
State (49) (476) 424
Total deferred (462) 650 1,883
Investment tax credits (5) (4) (3)
Total (1,916) (1,132) 308
MidAmerican Funding, LLC      
Current:      
Federal (773) (739) (689)
State (36) (94) (96)
Total current (809) (833) (785)
Deferred:      
Federal 77 189 204
State (43) (35) 8
Total deferred 34 154 212
Investment tax credits (1) (1) (1)
Total $ (776) $ (680) $ (574)