Segment and Geographic Area Information - Geographic Information Table (Details) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule Of Geographical Information [Line Items]
Revenues from external customers	$ 11,763,000,000	$ 9,274,000,000	$ 8,597,000,000
Long-lived assets	4,268,000,000	1,765,000,000
United States
Schedule Of Geographical Information [Line Items]
Revenues from external customers	4,488,000,000	3,632,000,000	3,512,000,000
Long-lived assets	1,341,000,000	655,000,000
China
Schedule Of Geographical Information [Line Items]
Revenues from external customers	1,553,000,000	1,283,000,000	1,186,000,000
Long-lived assets	687,000,000	280,000,000
Germany
Schedule Of Geographical Information [Line Items]
Revenues from external customers	1,212,000,000	798,000,000	764,000,000
Long-lived assets	543,000,000	144,000,000
Poland
Schedule Of Geographical Information [Line Items]
Revenues from external customers	731,000,000	488,000,000	385,000,000
Long-lived assets	319,000,000	219,000,000
United Kingdom
Schedule Of Geographical Information [Line Items]
Revenues from external customers	499,000,000	482,000,000	387,000,000
Long-lived assets	116,000,000	48,000,000
Mexico
Schedule Of Geographical Information [Line Items]
Revenues from external customers	543,000,000	416,000,000	352,000,000
Long-lived assets	239,000,000	75,000,000
India
Schedule Of Geographical Information [Line Items]
Revenues from external customers	316,000,000	216,000,000	159,000,000
Long-lived assets	167,000,000	46,000,000
Turkey
Schedule Of Geographical Information [Line Items]
Revenues from external customers	7,000,000	9,000,000	9,000,000
Long-lived assets	276,000,000	0
Other Foreign
Schedule Of Geographical Information [Line Items]
Revenues from external customers	2,414,000,000	1,950,000,000	1,843,000,000
Long-lived assets	687,000,000	298,000,000
Reclass & Elims
Schedule Of Geographical Information [Line Items]
Revenues from external customers	0	0	$ 0
Long-lived assets	$ (107,000,000)	$ 0