Restructuring Programs - Additional Information (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) employee	Jun. 30, 2020 USD ($)	Dec. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	$ 4	$ 21		$ 25
Restructuring charges	9	25
Headcount reductions, number of employees | employee				400
Restructuring charges, net reversals	5	4		$ 9
Payments for restructuring	22		$ 17	49	$ 52
Restructuring related reserve	18			18		$ 21
HCL Technologies
Restructuring Cost and Reserve [Line Items]
Payments for restructuring	3		$ 8	6	$ 8
Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	3	10
Restructuring charges	6	14		20
Restructuring charges, net reversals	3	4
Other Contractual Termination Costs
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	0	1
Restructuring charges	1	1		2
Restructuring charges, net reversals	1	0
Asset Impairments
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	1	10
Restructuring charges	2	10		$ 12
Restructuring charges, net reversals	$ 1	$ 0