Annual report pursuant to Section 13 and 15(d)

Income Taxes - Income Tax Reconciliation (Details)

v3.20.4
Income Taxes - Income Tax Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Effective Income Tax Rate Reconciliation      
Federal statutory income tax rate 21.00% 21.00% 21.00%
Computed expected tax benefit (expense) $ (221) $ 131 $ (186)
State and local income taxes, net of federal income taxes (45) 9 (13)
Foreign taxes, net of foreign tax credits 47 (1) (5)
Alternative energy tax credits 139 152 92
Change in valuation allowance affecting tax expense (59) (51) 9
Change in tax rate (15) (23) 61
Corporate realignment 360    
Change in tax rate - tax loss carryback   45  
Tax write-off of consolidated subsidiary   34  
Impairment of intangible asset   (93)  
Other, net 5 14 (18)
Income tax benefit (expense) $ 211 $ 217 $ (60)