RESTRUCTURING ACTIVITIES - Schedule of Pre-Tax Expenses in Association with the SCAE Plan (Details) - SCAE Plan - USD ($) $ in Millions	3 Months Ended
	Aug. 26, 2018	Aug. 27, 2017
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	$ 469.8
Recognized pre-tax expenses	0.6	$ 11.4
Cumulative pre-tax expenses	460.9
Total
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	467.5
Recognized pre-tax expenses	1.2
Cumulative pre-tax expenses	458.6
Total | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	131.1
Recognized pre-tax expenses	0.1
Cumulative pre-tax expenses	126.1
Total | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	42.4
Cumulative pre-tax expenses	42.2
Total | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	4.9
Recognized pre-tax expenses	0.2
Cumulative pre-tax expenses	4.9
Total | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	7.9
Cumulative pre-tax expenses	7.9
Total | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	281.2
Recognized pre-tax expenses	0.9
Cumulative pre-tax expenses	277.5
Total cost of goods sold
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	103.2
Recognized pre-tax expenses	2.3
Cumulative pre-tax expenses	99.8
Total cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	81.3
Recognized pre-tax expenses	2.3
Cumulative pre-tax expenses	77.9
Total cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	20.7
Cumulative pre-tax expenses	20.7
Total cost of goods sold | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Total cost of goods sold | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Total cost of goods sold | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	1.2
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	1.2
Multi-employer pension costs
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	32.5
Recognized pre-tax expenses	0.2
Cumulative pre-tax expenses	32.5
Multi-employer pension costs | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	32.5
Recognized pre-tax expenses	0.2
Cumulative pre-tax expenses	32.5
Multi-employer pension costs | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Multi-employer pension costs | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Multi-employer pension costs | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Multi-employer pension costs | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	57.0
Recognized pre-tax expenses	1.4
Cumulative pre-tax expenses	54.2
Accelerated depreciation | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	37.2
Recognized pre-tax expenses	1.4
Cumulative pre-tax expenses	34.4
Accelerated depreciation | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	18.6
Cumulative pre-tax expenses	18.6
Accelerated depreciation | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	1.2
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	1.2
Other cost of goods sold
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	13.7
Recognized pre-tax expenses	0.7
Cumulative pre-tax expenses	13.1
Other cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	11.6
Recognized pre-tax expenses	0.7
Cumulative pre-tax expenses	11.0
Other cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	2.1
Cumulative pre-tax expenses	2.1
Other cost of goods sold | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Other cost of goods sold | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Other cost of goods sold | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Total selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	364.3
Recognized pre-tax expenses	(1.1)
Cumulative pre-tax expenses	358.8
Total selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	49.8
Recognized pre-tax expenses	(2.2)
Cumulative pre-tax expenses	48.2
Total selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	21.7
Cumulative pre-tax expenses	21.5
Total selling, general and administrative expenses | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	4.9
Recognized pre-tax expenses	0.2
Cumulative pre-tax expenses	4.9
Total selling, general and administrative expenses | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	7.9
Cumulative pre-tax expenses	7.9
Total selling, general and administrative expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	280.0
Recognized pre-tax expenses	0.9
Cumulative pre-tax expenses	276.3
Severance and related costs, net
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	150.5
Recognized pre-tax expenses	(1.7)
Cumulative pre-tax expenses	148.6
Severance and related costs, net | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	26.3
Recognized pre-tax expenses	(1.3)
Cumulative pre-tax expenses	25.2
Severance and related costs, net | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	10.3
Cumulative pre-tax expenses	10.3
Severance and related costs, net | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	3.9
Recognized pre-tax expenses	0.2
Cumulative pre-tax expenses	3.9
Severance and related costs, net | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	7.9
Cumulative pre-tax expenses	7.9
Severance and related costs, net | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	102.1
Recognized pre-tax expenses	(0.6)
Cumulative pre-tax expenses	101.3
Fixed asset impairment (net of gains on disposal)
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	23.3
Recognized pre-tax expenses	(0.9)
Cumulative pre-tax expenses	23.3
Fixed asset impairment (net of gains on disposal) | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	5.2
Recognized pre-tax expenses	(0.9)
Cumulative pre-tax expenses	5.2
Fixed asset impairment (net of gains on disposal) | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	6.9
Cumulative pre-tax expenses	6.9
Fixed asset impairment (net of gains on disposal) | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Fixed asset impairment (net of gains on disposal) | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Fixed asset impairment (net of gains on disposal) | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	11.2
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	11.2
Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	4.1
Cumulative pre-tax expenses	4.1
Accelerated depreciation | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	4.1
Cumulative pre-tax expenses	4.1
Contract/lease termination expenses
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	87.5
Recognized pre-tax expenses	0.5
Cumulative pre-tax expenses	87.3
Contract/lease termination expenses | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	1.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	1.0
Contract/lease termination expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.6
Cumulative pre-tax expenses	0.6
Contract/lease termination expenses | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.9
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.9
Contract/lease termination expenses | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Contract/lease termination expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	85.0
Recognized pre-tax expenses	0.5
Cumulative pre-tax expenses	84.8
Consulting/professional fees
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	55.3
Recognized pre-tax expenses	0.1
Cumulative pre-tax expenses	53.8
Consulting/professional fees | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	1.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	1.0
Consulting/professional fees | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.4
Cumulative pre-tax expenses	0.4
Consulting/professional fees | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.1
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.1
Consulting/professional fees | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Consulting/professional fees | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	53.8
Recognized pre-tax expenses	0.1
Cumulative pre-tax expenses	52.3
Other selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	43.6
Recognized pre-tax expenses	0.9
Cumulative pre-tax expenses	41.7
Other selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	16.3
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	15.8
Other selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	3.5
Cumulative pre-tax expenses	3.3
Other selling, general and administrative expenses | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Other selling, general and administrative expenses | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	0.0
Cumulative pre-tax expenses	0.0
Other selling, general and administrative expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	23.8
Recognized pre-tax expenses	0.9
Cumulative pre-tax expenses	22.6
Pension and postretirement non-service income
Restructuring Cost and Reserve [Line Items]
Charges incurred or expected to be incurred	2.3
Recognized pre-tax expenses	(0.6)
Cumulative pre-tax expenses	$ 2.3