Restructuring and Related Implementation Charges (Details 1) (Two Thousand Twelve Restructuring Program [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	$ 155
Restructuring And Related Cost, Incurred Cost to Date, After Tax	122
One-time Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	93
Incremental Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	6
Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	0
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Cost Incurred to Date	$ 56
Pet Nutrition [Member]
Restructuring Cost and Reserve [Line Items]
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate	3.00%
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate	41.00%
North America [Member]
Restructuring Cost and Reserve [Line Items]
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate	1.00%
Latin America [Member]
Restructuring Cost and Reserve [Line Items]
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate	6.00%
Europe/South Pacific [Member]
Restructuring Cost and Reserve [Line Items]
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate	45.00%
Asia Africa Eurasia [Member]
Restructuring Cost and Reserve [Line Items]
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate	4.00%