Restructuring and Related Implementation Charges (Details 1) (Two Thousand Twelve Restructuring Program [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 102	$ 168
Restructuring And Related Cost, Incurred Cost, After Tax	79	131
Restructuring and Related Cost, Cost Incurred to Date		257
Restructuring And Related Cost, Incurred Cost to Date, After Tax		201
One-time Termination Benefits [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	71	86
Restructuring and Related Cost, Cost Incurred to Date		164
Incremental Depreciation [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	9	15
Restructuring and Related Cost, Cost Incurred to Date		15
Asset Impairment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	1	1
Restructuring and Related Cost, Cost Incurred to Date		1
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	21	66
Restructuring and Related Cost, Cost Incurred to Date		77
Pet Nutrition [Member]
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment for the duration of the program	15.00%	15.00%
Percent Of Total Restructuring Charges Related To Segment for the period	4.00%	4.00%
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate		3.00%
Corporate [Member]
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment for the duration of the program	35.00%	35.00%
Percent Of Total Restructuring Charges Related To Segment for the period	16.00%	27.00%
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate		31.00%
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%	15.00%
Percent Of Total Restructuring Charges Related To Segment for the period	35.00%	21.00%
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate		15.00%
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%	5.00%
Percent Of Total Restructuring Charges Related To Segment for the period		6.00%
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate		4.00%
Europe/South Pacific [Member]
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment for the duration of the program	20.00%	20.00%
Percent Of Total Restructuring Charges Related To Segment for the period	42.00%	38.00%
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate		44.00%
Asia Africa Eurasia [Member]
Restructuring Cost and Reserve [Line Items]
Expected Percent Of Total Restructuring Charges Related To Segment for the duration of the program	10.00%	10.00%
Percent Of Total Restructuring Charges Related To Segment for the period	3.00%	4.00%
PercentOfRestructuringChargesReportableSegmentProgramChargesIncurredToDate		3.00%
Cost of Sales [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	10	18
Selling, General and Administrative Expenses [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	14	22
Other (Income) Expense, Net [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	$ 78	$ 128