Income Taxes Income Taxes - Operating Loss Carryforwards (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating Loss Carryforwards [Line Items]
Net operating loss and capital loss carryforwards	$ 70	$ 84
State Operating Loss Carryforwards	571
Non-U.S. Tax Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards	212
Operating Loss Carryforwards subject to expiration	147
Operating Loss Carryforwards not subject to expiration	65
Operating Loss Carryforwards valuation allowance	134
Net operating loss and capital loss carryforwards	212
Tax Credit Carryforward, Amount	13
Tax Credit Carryforward, Valuation Allowance	2
Non-U.S. income tax holidays	26	$ 28
State and Local Jurisdiction
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards valuation allowance	504
Deferred Tax Assets, Tax Credit Carryforwards, Other	21
Tax Credit Carryforward, Valuation Allowance	$ 19