Restructuring Programs - Additional Information (Details) $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2021 USD ($)	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2021 USD ($) employee	Sep. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	$ 3	$ 4	$ 21		$ 28
Restructuring charges	6	9	25
Headcount reductions, number of employees | employee					435
Restructuring charges, net reversals	3	5	4		$ 12
Payments for restructuring	12			$ 11	61	$ 63
Restructuring related reserve	22				22		$ 21
HCL Technologies
Restructuring Cost and Reserve [Line Items]
Payments for restructuring	3			$ 15	9	$ 23
Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	2	3	10
Restructuring charges	5	6	14		25
Restructuring charges, net reversals	3	3	4
Other Contractual Termination Costs
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	1	0	1
Restructuring charges	1	1	1		3
Restructuring charges, net reversals	0	1	0
Asset Impairments
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	0	1	10
Restructuring charges	0	2	10		$ 12
Restructuring charges, net reversals	$ 0	$ 1	$ 0