Income Taxes - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Operating Loss Carryforwards [Line Items]
Decrease in unrecognized tax benefits is reasonably possible	$ 58,000,000
Components of the net operating loss carryforwards as of December 31, 2019	122,000,000
Income tax penalties and interest expense		$ 0	$ 0
Interest on income taxes accrued		0
Unrecognized tax benefits, income tax penalties accrued		0
Income tax paid	648,000,000	731,000,000	$ 968,000,000
Current income tax payable	124,000,000	$ 124,000,000
US Federal
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	93,000,000
Foreign
Operating Loss Carryforwards [Line Items]
Components of the net operating loss carryforwards as of December 31, 2019	$ 29,000,000