Restructuring and Related Implementation Charges - Restructuring Charges Incurred, by Segment (Details) - Global Growth and Efficiency Program	12 Months Ended		87 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
Percent of total restructuring charges related to segment	100.00%	100.00%
Percent of restructuring charges related to segment, total program accumulated charges			100.00%
Pet Nutrition
Restructuring Cost and Reserve [Line Items]
Percent of total restructuring charges related to segment	2.00%	19.00%
Percent of restructuring charges related to segment, total program accumulated charges			8.00%
Corporate
Restructuring Cost and Reserve [Line Items]
Percent of total restructuring charges related to segment	73.00%	37.00%
Percent of restructuring charges related to segment, total program accumulated charges			42.00%
North America
Restructuring Cost and Reserve [Line Items]
Percent of total restructuring charges related to segment	4.00%	18.00%
Percent of restructuring charges related to segment, total program accumulated charges			17.00%
Latin America
Restructuring Cost and Reserve [Line Items]
Percent of total restructuring charges related to segment	12.00%	10.00%
Percent of restructuring charges related to segment, total program accumulated charges			5.00%
Europe
Restructuring Cost and Reserve [Line Items]
Percent of total restructuring charges related to segment	4.00%	(2.00%)
Percent of restructuring charges related to segment, total program accumulated charges			19.00%
Asia Pacific
Restructuring Cost and Reserve [Line Items]
Percent of total restructuring charges related to segment	6.00%	13.00%
Percent of restructuring charges related to segment, total program accumulated charges			4.00%
Africa/Eurasia
Restructuring Cost and Reserve [Line Items]
Percent of total restructuring charges related to segment	(1.00%)	5.00%
Percent of restructuring charges related to segment, total program accumulated charges			5.00%