Concentrations - Summary of Long Lived Assets by Region (Details) - USD ($) $ in Millions	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Concentration Risk [Line Items]
Long-lived assets	$ 438	$ 442
Long-lived Assets Concentration
Concentration Risk [Line Items]
Long-lived assets	438	442	$ 371
Long-lived Assets Concentration | U.S. Plans
Concentration Risk [Line Items]
Long-lived assets	26	23	21
Long-lived Assets Concentration | Europe
Concentration Risk [Line Items]
Long-lived assets	273	273	219
Long-lived Assets Concentration | Asia
Concentration Risk [Line Items]
Long-lived assets	123	124	109
Long-lived Assets Concentration | Non-US
Concentration Risk [Line Items]
Long-lived assets	$ 16	$ 22	$ 22