Contingencies (Details) $ in Millions		1 Months Ended		3 Months Ended	9 Months Ended	12 Months Ended
	Jul. 21, 2016 case	Mar. 31, 2016 USD ($)	Sep. 30, 2015 appeal	Sep. 30, 2016 USD ($) case	Sep. 30, 2016 USD ($) case country_and_territory	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)
Loss Contingencies [Line Items]
Minimum number of countries and territories serving consumers (more than) (in countries and territories) | country_and_territory					200
Brazilian internal revenue authority, matter 1				$ 142	$ 142
Loss contingency, number of appeals lost (in appeals) | appeal			1
Brazilian internal revenue authority, matter 2				$ 59	$ 59
Fine imposed french competition authority							$ 57
Fine imposed french competition authority - as a result of Sanex acquisition							$ 25
European competition matters - Swiss competition law authority									$ 6
European competition matters - Italian competition law authority								$ 3
Loss contingency accrual, period increase (decrease)						$ 14
Litigation settlement, fine, amount		$ 14
Loss contingency, pending claims, number (in cases) | case				101	101
Loss contingency, new claims filed, number (in cases) | case				27
Loss contingency, claims settled and dismissed, number (in cases) | case	1
Loss contingency, claims dismissed, number (in cases) | case				29
Loss contingency, claims settled, number (in cases) | case				20
Minimum
Loss Contingencies [Line Items]
Range of reasonably possible losses				$ 0	$ 0
Maximum
Loss Contingencies [Line Items]
Range of reasonably possible losses				$ 250	$ 250