Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Aug. 25, 2024	Aug. 27, 2023
Statement of Comprehensive Income [Abstract]
Net income	$ 328.0	$ 418.2
Net income, tax (expense) benefit	138.9	(98.3)
Net income	466.9	319.9
Unrealized derivative adjustments	(2.5)	4.1
Unrealized derivative adjustments, tax expense (benefit)	0.6	(1.0)
Unrealized derivative adjustments, after-tax amount	(1.9)	3.1
Reclassification for derivative adjustments included in net income, pre-tax amount	(1.9)	(2.0)
Reclassification for derivative adjustments included in net income, tax expense (benefit)	(0.5)	(0.5)
Reclassification for derivative adjustments included in net income, after-tax amount	(1.4)	(1.5)
Unrealized currency translation gains (losses)	(19.3)	10.6
Unrealized currency translation gains (losses), after-tax amount	(19.3)	10.6
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
Reclassification for pension and postretirement benefit obligations included in net income	(1.1)	(1.2)
Reclassification for pension and postretirement benefit obligations included in net income, tax (expense) benefit	0.2	0.3
Reclassification for pension and postretirement benefit obligations included in net income, after-tax amount	(0.9)	(0.9)
Unrealized pension and postretirement benefit obligations	1.3	0.2
Unrealized pension and postretirement benefit obligations, tax (expense) benefit	(0.2)	(0.1)
Unrealized pension and postretirement benefit obligations, after-tax amount	1.1	0.1
Comprehensive income	384.3	429.9
Comprehensive income, tax (expense) benefit	140.0	(98.6)
Comprehensive income, after-tax amount	524.3	331.3
Comprehensive income (loss) attributable to noncontrolling interests	38.1	0.1
Comprehensive income (loss) attributable to noncontrolling interests, after-tax amount	38.1	0.1
Comprehensive income attributable to Conagra Brands, Inc.	346.2	429.8
Comprehensive income attributable to Conagra Brands, Inc., tax (expense) benefit	140.0	(98.6)
Comprehensive income attributable to Conagra Brands, Inc., after-tax amount	$ 486.2	$ 331.2