Contingencies (Details) $ in Millions	1 Months Ended		3 Months Ended		12 Months Ended
	Mar. 31, 2016 USD ($) case	Sep. 30, 2015 appeal	Mar. 31, 2016 USD ($) case country_and_territory	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2010 USD ($)	Dec. 31, 2009 USD ($)
Loss Contingency [Abstract]
Minimum Number of Countries and Territories Serving Consumers (more than) | country_and_territory			200
Range of reasonably possible losses, minimum	$ 0		$ 0
Range of reasonably possible losses, maximum	200		200
Brazilian internal revenue authority, matter 1	84		84
Number of Appeals Lost | appeal		1
Brazilian internal revenue authority, matter 2	53		$ 53
European competition matters - Swiss competition law authority								$ 6
European competition matters - Italian competition law authority							$ 3
Fine Imposed French Competition Authority						$ 57
Fine Imposed French Competition Authority - As a result of Sanex Acquisition						$ 25
Loss Contingency Accrual, Period Increase (Decrease)					$ 14
Litigation Settlement, Fine, Amount	13
Litigation Settlement, Cost Reimbursement, Amount	$ 1
Loss Contingency, Pending Claims, Number | case	51		51
Loss Contingency, New Claims Filed, Number | case			22
Loss Contingency, Claims Dismissed, Number | case			27
Loss Contingency, Claims Settled, Number | case			16
Loss Contingency, Damages Sought, Approximate Value				$ 2,500