Annual report pursuant to Section 13 and 15(d)

Income Taxes - Narrative (Details)

v3.22.0.1
Income Taxes - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Operating Loss Carryforwards [Line Items]      
Deferred Tax Assets, Valuation Allowance $ 63 $ 190  
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount (127)    
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration 13,800    
Deferred Tax Assets, Tax Credit Carryforwards 108 95  
Unrecognized Tax Benefits 65 $ 62 $ 61
Unrecognized Tax Benefits that Would Impact Effective Tax Rate 56    
Federal Tax [Member]      
Operating Loss Carryforwards [Line Items]      
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration 15,700    
Deferred Tax Assets, Tax Credit Carryforwards 107    
Federal Tax [Member] | Investment Tax Credit Carryforward [Member]      
Operating Loss Carryforwards [Line Items]      
Deferred Tax Assets, Tax Credit Carryforwards 60    
State Tax [Member]      
Operating Loss Carryforwards [Line Items]      
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration 2,400    
Deferred Tax Assets, Tax Credit Carryforwards 1    
Foreign Tax Authority      
Operating Loss Carryforwards [Line Items]      
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration 10    
Deferred Tax Assets, Tax Credit Carryforwards $ 44