Restructuring Programs - Additional Information (Details) $ in Millions		3 Months Ended						9 Months Ended
		Sep. 30, 2019 USD ($)		Jun. 30, 2019 USD ($)		Mar. 31, 2019 USD ($)		Sep. 30, 2019 USD ($) Employees
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	[1]	$ 8		$ 18		$ 54		$ 80
Restructuring charges		15		26		62
Headcount reductions, number of employees | Employees								450
Restructuring charges, net reversals		7		8		8		$ 23
Early termination of prior period impaired leases								6
Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	[1]	9		7		4
Restructuring charges		12		13		12		37
Restructuring charges, net reversals		3		6		8
Other Contractual Termination Costs
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	[1],[2]	(2)		3		14
Restructuring charges		1	[2]	3	[2]	14	[2]	18
Restructuring charges, net reversals	[2]	3		0		0
Asset Impairments
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	[1],[3]	1		8		36
Restructuring charges	[3]	2		10		36		$ 48
Restructuring charges, net reversals	[3]	$ 1		$ 2		$ 0

[1] Represents net amount recognized within the Condensed Consolidated Statements of Income for the period shown for restructuring and asset impairment charges.

[2] Primarily includes additional costs incurred upon the exit from our facilities including decommissioning costs and associated contractual termination costs.

[3] Primarily related to the exit and abandonment of leased and owned facilities. The charge includes the accelerated write-off of $36 for leased right-of-use asset balances and $12 for owned asset balances upon exit from the facility net of any potential sublease income or other recovery amounts.