Description of business, including segment and geographic area information - Geographic Area Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Segment Reporting Information [Line Items]
Total revenue		$ 3,771	$ 4,261	$ 11,033	$ 12,067
United States
Segment Reporting Information [Line Items]
Total revenue		504	665	1,468	1,783
Asia
Segment Reporting Information [Line Items]
Total revenue	[1]	2,263	2,520	6,512	7,075
Europe, Middle East and Africa
Segment Reporting Information [Line Items]
Total revenue		699	769	2,151	2,304
Japan
Segment Reporting Information [Line Items]
Total revenue		198	218	607	656
Rest of world
Segment Reporting Information [Line Items]
Total revenue		107	89	295	249
China
Segment Reporting Information [Line Items]
Total revenue		$ 1,900	$ 2,000	$ 5,400	$ 5,300

[1] Revenue from products shipped into China was $1.9 billion and $2.0 billion in the third quarters of 2019 and 2018, respectively, and $5.4 billion and $5.3 billion in the first nine months of 2019 and 2018, respectively