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Income Taxes Reconciliation of Income Tax Satutory Rate (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income tax expense at United States statutory rate $ 79 $ 1,054 $ 775
Increase (reduction) in income taxes resulting from:      
Noncontrolling interests 16 0 0
Partnership earnings not subject to tax 88 (866) (647)
State tax, net of federal tax benefit 58 12 (125)
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Amount (7) 0 0
Dividend received deduction 0 (3) (5)
Other 3 (2) 6
Income tax expense (benefit) from continuing operations $ 237 $ 195 $ 4