Restructuring Programs - Additional Information (Details) $ in Millions		3 Months Ended				6 Months Ended
		Jun. 30, 2019 USD ($)		Mar. 31, 2019 USD ($)		Jun. 30, 2019 USD ($) Employees
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	[1]	$ 18		$ 54		$ 72
Restructuring charges		26		62
Headcount reductions, number of employees | Employees						300
Restructuring charges, net reversals		8		8		$ 16
Early termination of prior period impaired leases						2
Severance and Related Costs
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	[1]	7		4
Restructuring charges		13		12		25
Restructuring charges, net reversals		6		8
Other Contractual Termination Costs
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	[1],[2]	3		14
Restructuring charges		3	[2]	14	[2]	17
Restructuring charges, net reversals	[2]	0		0
Asset Impairments
Restructuring Cost and Reserve [Line Items]
Net restructuring and asset impairment charges	[1]	8	[2]	36	[3]
Restructuring charges		10	[2]	36	[3]	$ 46	[3]
Restructuring charges, net reversals		$ 2	[2]	$ 0	[3]

[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 $34 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.