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Income Taxes (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2020
Income Taxes [Line Items]          
Effective tax rate 20.90% 24.10% 21.40% 22.20%  
Change in regulations     $ 93    
Minimum [Member]          
Income Taxes [Line Items]          
Statue of limitations     3 years    
Maximum [Member]          
Income Taxes [Line Items]          
Statue of limitations     5 years    
Tax Years 2015-2018 [Member]          
Income Taxes [Line Items]          
Dividend repatriation reduction       $ 67  
Forecast [Member] | Minimum [Member]          
Income Taxes [Line Items]          
Effective tax rate         22.00%
Forecast [Member] | Maximum [Member]          
Income Taxes [Line Items]          
Effective tax rate         23.00%
RBH [Member]          
Income Taxes [Line Items]          
Tax adjustments       $ 49