Income Taxes Unrecognized Benefits (Details) - USD ($)	3 Months Ended
	Mar. 31, 2020	Jun. 30, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Unrecognized tax benefit — Permanent tax positions		$ 36,000,000	$ 35,000,000
Unrecognized tax benefit — Temporary tax positions		10,000,000	9,000,000
Total unrecognized tax benefit		46,000,000	44,000,000
NOL and tax credit carryforwards		41,000,000	40,000,000
Net Deferred Tax Liability associated with the Unrecognized Tax Benefit Amounts and Related NOLs and Tax Credit Carryforwards		(31,000,000)	(29,000,000)
Decrease in Unrecognized Tax Benefits is Reasonably Possible		23,000,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued	$ 0
Unrecognized Tax Benefits, Income Tax Penalties Accrued		$ 0	$ 0