Restructuring and Related Implementation Charges (Details) - 2012 Restructuring Program $ in Millions		3 Months Ended	12 Months Ended
	Oct. 29, 2015	Dec. 31, 2012	Dec. 31, 2015 USD ($) employees
Restructuring Cost and Reserve [Line Items]
Duration Of Restructuring Program		4 years
Duration of Extension of the Restructuring Program	1 year
Expected Percent of Total Charges Resulting In Cash Expenditure			75.00%
Pet Nutrition [Member]
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment For The Duration Of The Program			10.00%
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment For The Duration Of The Program			40.00%
North America [Member]
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment For The Duration Of The Program			15.00%
Europe/South Pacific
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment For The Duration Of The Program			20.00%
Latin America [Member]
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment For The Duration Of The Program			5.00%
Asia [Member]
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment For The Duration Of The Program			5.00%
Africa/Eurasia [Member]
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment For The Duration Of The Program			5.00%
Employee Related Costs [Member]
Restructuring Cost and Reserve [Line Items]
Estimated Percent Of Total Cumulative Pretax Charges Of Implementing Restructuring Program By Category			50.00%
Incremental Depreciation And Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Estimated Percent Of Total Cumulative Pretax Charges Of Implementing Restructuring Program By Category			10.00%
Charges Resulting Directly From Exit Activities [Member]
Restructuring Cost and Reserve [Line Items]
Estimated Percent Of Total Cumulative Pretax Charges Of Implementing Restructuring Program By Category			20.00%
Implementation Of New Strategies [Member]
Restructuring Cost and Reserve [Line Items]
Estimated Percent Of Total Cumulative Pretax Charges Of Implementing Restructuring Program By Category			20.00%
Minimum [Member] | Expected Completion Date 2016 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Program Expected Cost Before Tax			$ 1,285
Restructuring Program Total Expected Cost After Tax			950
Restructuring Program Expected Cost, Upcoming Fiscal Year, Before Tax			285
Restructuring Program Expected Cost, Upcoming Fiscal Year, After Tax			$ 210
Restructuring and Related Cost, Expected Number of Positions Eliminated | employees			2,700
Maximum [Member] | Expected Completion Date 2016 [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Program Expected Cost Before Tax			$ 1,435
Restructuring Program Total Expected Cost After Tax			1,050
Restructuring Program Expected Cost, Upcoming Fiscal Year, Before Tax			435
Restructuring Program Expected Cost, Upcoming Fiscal Year, After Tax			$ 310
Restructuring and Related Cost, Expected Number of Positions Eliminated | employees			3,200