Restructuring and Related Implementation Charges (Details) - Two Thousand Twelve Restructuring Program [Member] $ in Millions	3 Months Ended	6 Months Ended
	Dec. 31, 2012	Jun. 30, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Duration of the Restructuring Program	4 years
Expected percent of total charges resulting in cash expenditure		75.00%
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%
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 [Member]
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%
Expected Completion Date 2016 [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring program expected cost before tax		$ 1,285
Restructuring program expected cost after tax		$ 950
Restructuring and Related Cost, Positions Eliminated [Abstract]
Restructuring and Related Cost, Expected Number of Positions Eliminated		2,000
Expected Completion Date 2016 [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring program expected cost before tax		$ 1,435
Restructuring program expected cost after tax		$ 1,050
Restructuring and Related Cost, Positions Eliminated [Abstract]
Restructuring and Related Cost, Expected Number of Positions Eliminated		2,500
Expected Completion Date December 2015 [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring program expected cost before tax		$ 330
Restructuring program expected cost after tax		245
Expected Completion Date December 2015 [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring program expected cost before tax		385
Restructuring program expected cost after tax		$ 285