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Restructuring and Related Implementation Charges - Narrative (Details) - USD ($) $ in Millions		3 Months Ended
	Jul. 31, 2025	Mar. 31, 2026	Mar. 31, 2025
Postretirement Benefits
Restructuring Cost and Reserve [Line Items]
Postretirement benefit enhancements		$ 7	$ 6
Strategic Growth and Productivity Program
Restructuring Cost and Reserve [Line Items]
Restructuring program period in force	3 years
Strategic Growth and Productivity Program | Employee-Related Costs | Postretirement Benefits
Restructuring Cost and Reserve [Line Items]
Postretirement benefit enhancements		5
Strategic Growth and Productivity Program | Minimum
Restructuring Cost and Reserve [Line Items]
Foreign exchange		$ 350
Restructuring and related cost, expected cost, cash (in percent)		80.00%
Strategic Growth and Productivity Program | Minimum | Pet Nutrition
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		10.00%
Strategic Growth and Productivity Program | Minimum | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		20.00%
Strategic Growth and Productivity Program | Minimum | North America
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		5.00%
Strategic Growth and Productivity Program | Minimum | Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		15.00%
Strategic Growth and Productivity Program | Minimum | Europe, Middle East & Africa
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		25.00%
Strategic Growth and Productivity Program | Minimum | Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		10.00%
Strategic Growth and Productivity Program | Minimum | Employee-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		70.00%
Strategic Growth and Productivity Program | Minimum | Other
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		20.00%
Strategic Growth and Productivity Program | Maximum
Restructuring Cost and Reserve [Line Items]
Foreign exchange		$ 550
Restructuring and related cost, expected cost, cash (in percent)		90.00%
Strategic Growth and Productivity Program | Maximum | Pet Nutrition
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		15.00%
Strategic Growth and Productivity Program | Maximum | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		25.00%
Strategic Growth and Productivity Program | Maximum | North America
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		10.00%
Strategic Growth and Productivity Program | Maximum | Latin America
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		20.00%
Strategic Growth and Productivity Program | Maximum | Europe, Middle East & Africa
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		30.00%
Strategic Growth and Productivity Program | Maximum | Asia Pacific
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		15.00%
Strategic Growth and Productivity Program | Maximum | Employee-Related Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		80.00%
Strategic Growth and Productivity Program | Maximum | Other
Restructuring Cost and Reserve [Line Items]
Restructuring and related cost, expected cost (in percent)		30.00%

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