Income Taxes (Details 5) $ in Millions	Dec. 31, 2018 USD ($)
Net operating loss (NOL) carryforwards
U.S. foreign tax credits available for carryforward	$ 12
U.S. state taxing jurisdictions
Net operating loss (NOL) carryforwards
NOL carryforwards	164
Gross deferred income tax asset associated with NOL carryforwards	13
NOL carryforwards, Valuation allowance	2
U.S. state taxing jurisdictions | Expiration Date 2019
Net operating loss (NOL) carryforwards
NOL carryforwards	4
U.S. state taxing jurisdictions | Expiration Date 2020
Net operating loss (NOL) carryforwards
NOL carryforwards	0
U.S. state taxing jurisdictions | Expiration Date 2021
Net operating loss (NOL) carryforwards
NOL carryforwards	5
U.S. state taxing jurisdictions | Expiration Date 2022
Net operating loss (NOL) carryforwards
NOL carryforwards	5
U.S. state taxing jurisdictions | Expiration Date 2023-2038
Net operating loss (NOL) carryforwards
NOL carryforwards	148
U.S. state taxing jurisdictions | Unlimited
Net operating loss (NOL) carryforwards
NOL carryforwards	2
Non-U.S. taxing jurisdictions
Net operating loss (NOL) carryforwards
NOL carryforwards	140
Non-U.S. taxing jurisdictions | Expiration Date 2019
Net operating loss (NOL) carryforwards
NOL carryforwards	0
Non-U.S. taxing jurisdictions | Expiration Date 2020
Net operating loss (NOL) carryforwards
NOL carryforwards	0
Non-U.S. taxing jurisdictions | Expiration Date 2021
Net operating loss (NOL) carryforwards
NOL carryforwards	17
Non-U.S. taxing jurisdictions | Expiration Date 2022
Net operating loss (NOL) carryforwards
NOL carryforwards	3
Non-U.S. taxing jurisdictions | Expiration Date 2023-2038
Net operating loss (NOL) carryforwards
NOL carryforwards	15
Non-U.S. taxing jurisdictions | Unlimited
Net operating loss (NOL) carryforwards
NOL carryforwards	105
Maximum | Non-U.S. taxing jurisdictions
Net operating loss (NOL) carryforwards
NOL carryforwards, Valuation allowance	$ 1