Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Income Tax [Line Items]
Expected annualized effective tax rate	24.50%	24.50%	24.50%	24.50%
Income tax expense	$ 25	$ 36	$ 50	$ 75
RGHL Group
Income Tax [Line Items]
Income tax expense				$ 23