Benefit Plans Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016		Dec. 31, 2015		Dec. 31, 2014
Defined Benefit Plan, Change in Benefit Obligation [Roll Forward]
Projected benefit obligation, beginning		$ 127		$ 129
Service cost		9		9		$ 4
Interest cost		3		3		2
Plan combinations	[1]	0		12
Changes in actuarial assumptions and other		9		(4)
Settlements and curtailments	[2]	(12)		(4)
Benefits paid		(3)		0
Net transfer out related to divestitures		(4)
Adjustments for foreign currency translation		1		(18)
Benefit obligation, ending		130		127		129
Defined Benefit Plan, Change in Fair Value of Plan Assets [Roll Forward]
Fair value of plan assets, beginning		72	[3]	63
Plan combinations	[1]	0		9
Actual return on plan assets		(1)		4
Company contributions		9		8
Settlements and curtailments	[2]	(6)		(3)
Acquisitions/divestitures		(4)		0
Adjustments for foreign currency translation		1		(8)
Other––net		(3)		(1)
Fair value of plan assets, ending		68	[3]	72	[3]	$ 63
Funded status—Projected benefit obligation in excess of plan assets at end of year	[4]	$ (62)		(55)
PHARMAQ
Net obligation	[1]			$ 2

[1] Represents the benefit obligations and plan assets acquired in 2015 from Pharmaq (net obligation of approximately $2 million).

[2] For 2016, reflects the impact of employee terminations due to our operational efficiency and supply network strategy initiatives.

[3] Fair values are determined based on valuation inputs categorized as Level 1, 2 or 3 (see Note 3. Significant Accounting Policies—Fair Value). Investment plan assets are valued using Level 1 or Level 2 inputs.

[4] Included in Other noncurrent liabilities.