Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Aug. 24, 2025	Aug. 25, 2024
Statement of Comprehensive Income [Abstract]
Net income	$ 289.1	$ 328.0
Net income, tax (expense) benefit	(124.6)	138.9
Net income	164.5	466.9
Unrealized derivative adjustments	1.0	(2.5)
Unrealized derivative adjustments, tax expense (benefit)	(0.3)	0.6
Unrealized derivative adjustments, after-tax amount	0.7	(1.9)
Reclassification for derivative adjustments included in net income, pre-tax amount	(1.4)	(1.9)
Reclassification for derivative adjustments included in net income, tax expense (benefit)	0.3	0.5
Reclassification for derivative adjustments included in net income, after-tax amount	(1.1)	(1.4)
Unrealized currency translation gains (losses)	1.1	(19.3)
Unrealized currency translation gains (losses), after-tax amount	1.1	(19.3)
Reclassification for currency translation losses in connection with the sale of Agro Tech Foods Limited		79.8
Reclassification for currency translation losses in connection with the sale of Agro Tech Foods Limited, after-tax amount		79.8
Unrealized pension and postretirement benefit obligations	0.4	1.3
Unrealized pension and postretirement benefit obligations, tax (expense) benefit		(0.2)
Unrealized pension and postretirement benefit obligations, after-tax amount	0.4	1.1
Reclassification for pension and postretirement benefit obligations included in net income	(0.9)	(1.1)
Reclassification for pension and postretirement benefit obligations included in net income, tax (expense) benefit	0.2	0.2
Reclassification for pension and postretirement benefit obligations included in net income, after-tax amount	(0.7)	(0.9)
Comprehensive income	289.3	384.3
Comprehensive income, tax (expense) benefit	(124.4)	140.0
Comprehensive income, after-tax amount	164.9	524.3
Comprehensive income attributable to noncontrolling interests (see Note 3)		38.1
Comprehensive income attributable to noncontrolling interests, after-tax amount (see Note 3)		38.1
Comprehensive income attributable to Conagra Brands, Inc.	289.3	346.2
Comprehensive income attributable to Conagra Brands, Inc., tax (expense) benefit	(124.4)	140.0
Comprehensive income attributable to Conagra Brands, Inc., after-tax amount	$ 164.9	$ 486.2