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Segment Reporting - Revenues by Geographic Area (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Revenue from External Customer [Line Items]
Sales	$ 10,872	$ 11,760	$ 22,929	$ 22,575
United States
Revenue from External Customer [Line Items]
Sales	4,634	5,193	9,771	9,748
Europe, Middle East and Africa
Revenue from External Customer [Line Items]
Sales	3,071	3,163	6,605	6,265
China
Revenue from External Customer [Line Items]
Sales	834	763	1,699	1,509
Japan
Revenue from External Customer [Line Items]
Sales	867	921	1,678	1,720
Asia Pacific (other than China and Japan)
Revenue from External Customer [Line Items]
Sales	666	716	1,394	1,461
Latin America
Revenue from External Customer [Line Items]
Sales	510	658	1,066	1,219
Other
Revenue from External Customer [Line Items]
Sales	$ 290	$ 346	$ 716	$ 653

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