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Fair Value (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 9 Months Ended
Jul. 01, 2019
Sep. 30, 2020
Sep. 30, 2019
Jun. 30, 2019
Sep. 30, 2020
Dec. 31, 2019
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Unrealized loss on cash flow hedge $ 0 $ (1) $ 0 $ 0 $ (19)  
Derivative notional amount, Interest Rate Swap   300     300 $ 300
Interest Rate Derivative Assets, at Fair Value           3
Interest Rate Derivative Liabilities, at Fair Value   (16)     (16)  
Long-term Debt   1,833     1,833 1,785
Long-term Debt, fair value   1,845     1,845 1,815
Fair Value Inputs, Level 1 [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Long-term Debt, fair value   0     0 0
Fair Value Inputs, Level 2 [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Long-term Debt, fair value   1,791     1,791 1,751
Fair Value Inputs, Level 3 [Member]            
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]            
Long-term Debt, fair value   $ 54     $ 54 $ 64