Restructuring and Related Implementation Charges (Details) - 2012 Restructuring Program $ in Millions		6 Months Ended
	Oct. 29, 2015	Jun. 30, 2017 USD ($) position	Mar. 31, 2017 USD ($)
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		5.00%
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
Restructuring Cost and Reserve [Line Items]
Expected percent of total restructuring charges related to segment for the duration of the program		25.00%
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 Pacific
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		45.00%
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		25.00%
Minimum | Expected Completion Date 2017
Restructuring Cost and Reserve [Line Items]
Restructuring program expected cost before tax		$ 1,500	$ 1,405
Restructuring program expected cost after tax		1,120	1,050
Restructuring program expected cost, upcoming fiscal year, before tax		275	180
Restructuring program expected cost, upcoming fiscal year, after tax		$ 210	140
Restructuring and related cost, expected number of positions eliminated (in positions) | position		3,300
Maximum | Expected Completion Date 2017
Restructuring Cost and Reserve [Line Items]
Restructuring program expected cost before tax		$ 1,585	1,585
Restructuring program expected cost after tax		1,170	1,170
Restructuring program expected cost, upcoming fiscal year, before tax		360	360
Restructuring program expected cost, upcoming fiscal year, after tax		$ 260	$ 260
Restructuring and related cost, expected number of positions eliminated (in positions) | position		3,800