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Income Taxes - Refundable Income Taxes and Income Taxes Payable Narrative (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Refundable income taxes and income taxes payable [Line Items]    
Refundable income taxes $ 16  
Prepaid Expenses and Other Current Assets [Member]    
Refundable income taxes and income taxes payable [Line Items]    
Refundable income taxes, Current 9 $ 14
Other assets and deferred charges    
Refundable income taxes and income taxes payable [Line Items]    
Refundable income taxes, Noncurrent 7  
Accrued Liabilities [Member]    
Refundable income taxes and income taxes payable [Line Items]    
Taxes Payable, Current $ 12 $ 6