RESTRUCTURING ACTIVITIES - Schedule of Pre-Tax Expenses in Association with the SCAE Plan (Details) - SCAE Plan - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 26, 2017	Nov. 27, 2016	Nov. 26, 2017	Nov. 27, 2016
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	$ 464.8		$ 464.8
Recognized pre-tax expenses	7.1	$ 19.8	18.5	$ 33.9
Cumulative pre-tax expenses	440.8		440.8
Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	125.1		125.1
Recognized pre-tax expenses	4.0		10.2
Cumulative pre-tax expenses	123.2		123.2
Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	43.6		43.6
Cumulative pre-tax expenses	43.6		43.6
Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	4.1		4.1
Recognized pre-tax expenses	0.9		0.9
Cumulative pre-tax expenses	4.1		4.1
Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	7.9		7.9
Cumulative pre-tax expenses	7.9		7.9
Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	284.1		284.1
Recognized pre-tax expenses	2.2		7.4
Cumulative pre-tax expenses	262.0		262.0
Total cost of goods sold
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	98.5		98.5
Recognized pre-tax expenses	3.4		5.7
Cumulative pre-tax expenses	98.0		98.0
Total cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	75.1		75.1
Recognized pre-tax expenses	3.4		5.7
Cumulative pre-tax expenses	74.6		74.6
Total cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	22.2		22.2
Cumulative pre-tax expenses	22.2		22.2
Total cost of goods sold | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Total cost of goods sold | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Total cost of goods sold | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	1.2		1.2
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	1.2		1.2
Pension costs
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	34.4		34.4
Recognized pre-tax expenses	2.1		2.1
Cumulative pre-tax expenses	36.5		36.5
Pension costs | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	32.9		32.9
Recognized pre-tax expenses	2.1		2.1
Cumulative pre-tax expenses	35.0		35.0
Pension costs | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	1.5		1.5
Cumulative pre-tax expenses	1.5		1.5
Pension costs | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Pension costs | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Pension costs | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	52.0		52.0
Recognized pre-tax expenses			1.2
Cumulative pre-tax expenses	52.0		52.0
Accelerated depreciation | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	32.2		32.2
Recognized pre-tax expenses			1.2
Cumulative pre-tax expenses	32.2		32.2
Accelerated depreciation | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	18.6		18.6
Cumulative pre-tax expenses	18.6		18.6
Accelerated depreciation | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Recognized pre-tax expenses			0.0
Cumulative pre-tax expenses	0.0		0.0
Accelerated depreciation | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Accelerated depreciation | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	1.2		1.2
Recognized pre-tax expenses			0.0
Cumulative pre-tax expenses	1.2		1.2
Other cost of goods sold
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	12.1		12.1
Recognized pre-tax expenses	1.3		2.4
Cumulative pre-tax expenses	9.5		9.5
Other cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	10.0		10.0
Recognized pre-tax expenses	1.3		2.4
Cumulative pre-tax expenses	7.4		7.4
Other cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	2.1		2.1
Cumulative pre-tax expenses	2.1		2.1
Other cost of goods sold | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Other cost of goods sold | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Other cost of goods sold | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Total selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	366.3		366.3
Recognized pre-tax expenses	3.7		12.8
Cumulative pre-tax expenses	342.8		342.8
Total selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	50.0		50.0
Recognized pre-tax expenses	0.6		4.5
Cumulative pre-tax expenses	48.6		48.6
Total selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	21.4		21.4
Cumulative pre-tax expenses	21.4		21.4
Total selling, general and administrative expenses | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	4.1		4.1
Recognized pre-tax expenses	0.9		0.9
Cumulative pre-tax expenses	4.1		4.1
Total selling, general and administrative expenses | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	7.9		7.9
Cumulative pre-tax expenses	7.9		7.9
Total selling, general and administrative expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	282.9		282.9
Recognized pre-tax expenses	2.2		7.4
Cumulative pre-tax expenses	260.8		260.8
Severance and related costs, net
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	151.0		151.0
Recognized pre-tax expenses	1.3		3.3
Cumulative pre-tax expenses	149.4		149.4
Severance and related costs, net | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	26.0		26.0
Recognized pre-tax expenses	(0.2)		1.8
Cumulative pre-tax expenses	25.7		25.7
Severance and related costs, net | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	10.3		10.3
Cumulative pre-tax expenses	10.3		10.3
Severance and related costs, net | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	3.4		3.4
Recognized pre-tax expenses	0.9		0.9
Cumulative pre-tax expenses	3.4		3.4
Severance and related costs, net | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	7.9		7.9
Cumulative pre-tax expenses	7.9		7.9
Severance and related costs, net | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	103.4		103.4
Recognized pre-tax expenses	0.6		0.6
Cumulative pre-tax expenses	102.1		102.1
Fixed asset impairment (net of gains on disposal)
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	24.0		24.0
Recognized pre-tax expenses	(1.5)		3.0
Cumulative pre-tax expenses	24.0		24.0
Fixed asset impairment (net of gains on disposal) | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	5.9		5.9
Recognized pre-tax expenses	(1.5)		(1.4)
Cumulative pre-tax expenses	5.9		5.9
Fixed asset impairment (net of gains on disposal) | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	6.9		6.9
Cumulative pre-tax expenses	6.9		6.9
Fixed asset impairment (net of gains on disposal) | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Fixed asset impairment (net of gains on disposal) | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Fixed asset impairment (net of gains on disposal) | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	11.2		11.2
Recognized pre-tax expenses	0.0		4.4
Cumulative pre-tax expenses	11.2		11.2
Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	4.7		4.7
Recognized pre-tax expenses	0.7		1.3
Cumulative pre-tax expenses	3.9		3.9
Accelerated depreciation | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Accelerated depreciation | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Accelerated depreciation | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Accelerated depreciation | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Accelerated depreciation | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	4.7		4.7
Recognized pre-tax expenses	0.7		1.3
Cumulative pre-tax expenses	3.9		3.9
Contract/lease cancellation expenses
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	88.3		88.3
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	73.3		73.3
Contract/lease cancellation expenses | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.9		0.9
Recognized pre-tax expenses	0.1		0.1
Cumulative pre-tax expenses	0.9		0.9
Contract/lease cancellation expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.6		0.6
Cumulative pre-tax expenses	0.6		0.6
Contract/lease cancellation expenses | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.6		0.6
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.6		0.6
Contract/lease cancellation expenses | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Contract/lease cancellation expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	86.2		86.2
Recognized pre-tax expenses	(0.1)		(0.1)
Cumulative pre-tax expenses	71.2		71.2
Consulting/professional fees
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	55.7		55.7
Recognized pre-tax expenses	0.5		0.7
Cumulative pre-tax expenses	53.3		53.3
Consulting/professional fees | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	1.1		1.1
Recognized pre-tax expenses	0.1		0.1
Cumulative pre-tax expenses	1.0		1.0
Consulting/professional fees | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.4		0.4
Cumulative pre-tax expenses	0.4		0.4
Consulting/professional fees | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.1		0.1
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.1		0.1
Consulting/professional fees | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Consulting/professional fees | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	54.1		54.1
Recognized pre-tax expenses	0.4		0.6
Cumulative pre-tax expenses	51.8		51.8
Other selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	42.6		42.6
Recognized pre-tax expenses	2.7		4.5
Cumulative pre-tax expenses	38.9		38.9
Other selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	16.1		16.1
Recognized pre-tax expenses	2.1		3.9
Cumulative pre-tax expenses	15.1		15.1
Other selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	3.2		3.2
Cumulative pre-tax expenses	3.2		3.2
Other selling, general and administrative expenses | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Recognized pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Other selling, general and administrative expenses | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0		0.0
Cumulative pre-tax expenses	0.0		0.0
Other selling, general and administrative expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	23.3		23.3
Recognized pre-tax expenses	0.6		0.6
Cumulative pre-tax expenses	$ 20.6		$ 20.6