Description of business, including segment and geographic area information - Geographic Area Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Total revenue		$ 4,151	$ 4,532	$ 11,634	$ 13,442
Revenue from Contract with Customer, Product and Service Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total revenue		$ 4,151	$ 4,532	$ 11,634	$ 13,442
Concentration risk, percentage		100.00%	100.00%	100.00%	100.00%
United States | Revenue from Contract with Customer, Product and Service Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total revenue		$ 1,639	$ 1,541	$ 4,335	$ 4,391
Concentration risk, percentage		39.00%	34.00%	37.00%	33.00%
China | Revenue from Contract with Customer, Product and Service Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total revenue		$ 823	$ 813	$ 2,191	$ 2,561
Concentration risk, percentage		20.00%	18.00%	19.00%	19.00%
Rest of Asia | Revenue from Contract with Customer, Product and Service Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total revenue		$ 431	$ 434	$ 1,249	$ 1,263
Concentration risk, percentage		10.00%	10.00%	11.00%	10.00%
Europe, Middle East and Africa | Revenue from Contract with Customer, Product and Service Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total revenue	[1]	$ 880	$ 1,193	$ 2,733	$ 3,657
Concentration risk, percentage	[1]	21.00%	26.00%	23.00%	27.00%
Japan | Revenue from Contract with Customer, Product and Service Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total revenue		$ 313	$ 455	$ 935	$ 1,373
Concentration risk, percentage		8.00%	10.00%	8.00%	10.00%
Rest of world | Revenue from Contract with Customer, Product and Service Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Total revenue		$ 65	$ 96	$ 191	$ 197
Concentration risk, percentage		2.00%	2.00%	2.00%	1.00%
Germany | Revenue from Contract with Customer, Product and Service Benchmark | Geographic Concentration Risk
Segment Reporting Information [Line Items]
Concentration risk, percentage		11.00%	13.00%	12.00%	13.00%

[1] Revenue from end customers headquartered in Germany was 11% and 13% in the third quarters of 2024 and 2023, respectively, and 12% and 13% in the first nine months of 2024 and 2023, respectively.