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Restructuring Programs - Additional Information (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) employee	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($)
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	$ 21
Restructuring charges	$ 25
Headcount reductions, number of employees \| employee	350
Restructuring charges, net reversals	$ 4
Payments for restructuring	27	$ 35
Restructuring related reserve	13		$ 21
HCL Technologies
Restructuring Cost and Reserve [Line Items]
Payments for restructuring	3	$ 0
Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	10
Restructuring charges	14
Restructuring charges, net reversals	4
Other Contractual Termination Costs
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	1
Restructuring charges	1
Restructuring charges, net reversals	0
Asset Impairments
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	10
Restructuring charges	10
Restructuring charges, net reversals	$ 0