Restructuring and Related Implementation Charges (Details) - 2012 Restructuring Program $ in Millions		3 Months Ended
	Oct. 29, 2015	Mar. 31, 2016 USD ($) position	Dec. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Duration of Extension of the Restructuring Program	1 year
Expected percent of total charges resulting in cash expenditure		75.00%
Hill’s Pet Nutrition
Restructuring Cost and Reserve [Line Items]
Expected percent of total restructuring charges related to segment for the duration of the program		10.00%
Corporate
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
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
Restructuring Cost and Reserve [Line Items]
Expected percent of total restructuring charges related to segment for the duration of the program		5.00%
Asia
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
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
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
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
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
Restructuring Cost and Reserve [Line Items]
Estimated percent of total cumulative pretax charges of implementing restructuring program by category		20.00%
Minimum | Expected Completion Date 2017
Restructuring Cost and Reserve [Line Items]
Restructuring program expected cost before tax		$ 1,405	$ 1,285
Restructuring program expected cost after tax		$ 1,050	950
Restructuring and Related Cost, Expected Number of Positions Eliminated | position		3,300
Minimum | Expected Completion Date 2016
Restructuring Cost and Reserve [Line Items]
Restructuring program expected cost before tax		$ 270	285
Restructuring program expected cost after tax		200	210
Maximum | Expected Completion Date 2017
Restructuring Cost and Reserve [Line Items]
Restructuring program expected cost before tax		1,585	1,435
Restructuring program expected cost after tax		$ 1,170	1,050
Restructuring and Related Cost, Expected Number of Positions Eliminated | position		3,800
Maximum | Expected Completion Date 2016
Restructuring Cost and Reserve [Line Items]
Restructuring program expected cost before tax		$ 310	435
Restructuring program expected cost after tax		$ 230	$ 310