RESTRUCTURING ACTIVITIES - Schedule of Pre-Tax Expenses in Association with the SCAE Plan (Details) - SCAE Plan - USD ($) $ in Millions	3 Months Ended
	Aug. 27, 2017	Aug. 28, 2016
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	$ 450.1
Recognized pre-tax expenses	11.4	$ 14.1
Cumulative pre-tax expenses	433.7
Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	126.8
Recognized pre-tax expenses	6.2
Cumulative pre-tax expenses	119.2
Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	43.6
Cumulative pre-tax expenses	43.6
Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	3.2
Cumulative pre-tax expenses	3.2
Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	7.9
Cumulative pre-tax expenses	7.9
Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	268.6
Recognized pre-tax expenses	5.2
Cumulative pre-tax expenses	259.8
Total cost of goods sold
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	99.2
Recognized pre-tax expenses	2.3
Cumulative pre-tax expenses	94.6
Total cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	75.8
Recognized pre-tax expenses	2.3
Cumulative pre-tax expenses	71.2
Total cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	22.2
Cumulative pre-tax expenses	22.2
Total cost of goods sold | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated 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]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Total cost of goods sold | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	1.2
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	1.2
Pension costs
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	34.4
Cumulative pre-tax expenses	34.4
Pension costs | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	32.9
Cumulative pre-tax expenses	32.9
Pension costs | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	1.5
Cumulative pre-tax expenses	1.5
Pension costs | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Pension costs | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Pension costs | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	53.5
Recognized pre-tax expenses	1.2
Cumulative pre-tax expenses	52.0
Accelerated depreciation | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	33.7
Recognized pre-tax expenses	1.2
Cumulative pre-tax expenses	32.2
Accelerated depreciation | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	18.6
Cumulative pre-tax expenses	18.6
Accelerated depreciation | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	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]
Anticipated pre-tax expenses	11.3
Recognized pre-tax expenses	1.1
Cumulative pre-tax expenses	8.2
Other cost of goods sold | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	9.2
Recognized pre-tax expenses	1.1
Cumulative pre-tax expenses	6.1
Other cost of goods sold | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	2.1
Cumulative pre-tax expenses	2.1
Other cost of goods sold | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated 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]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Other cost of goods sold | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	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]
Anticipated pre-tax expenses	350.9
Recognized pre-tax expenses	9.1
Cumulative pre-tax expenses	339.1
Total selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	51.0
Recognized pre-tax expenses	3.9
Cumulative pre-tax expenses	48.0
Total selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	21.4
Cumulative pre-tax expenses	21.4
Total selling, general and administrative expenses | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	3.2
Cumulative pre-tax expenses	3.2
Total selling, general and administrative expenses | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	7.9
Cumulative pre-tax expenses	7.9
Total selling, general and administrative expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	267.4
Recognized pre-tax expenses	5.2
Cumulative pre-tax expenses	258.6
Severance and related costs, net
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	149.7
Recognized pre-tax expenses	2.0
Cumulative pre-tax expenses	148.1
Severance and related costs, net | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	26.9
Recognized pre-tax expenses	2.0
Cumulative pre-tax expenses	25.9
Severance and related costs, net | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	10.3
Cumulative pre-tax expenses	10.3
Severance and related costs, net | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	2.5
Cumulative pre-tax expenses	2.5
Severance and related costs, net | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	7.9
Cumulative pre-tax expenses	7.9
Severance and related costs, net | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	102.1
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	101.5
Fixed asset impairment (net of gains on disposal)
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	25.5
Recognized pre-tax expenses	4.5
Cumulative pre-tax expenses	25.5
Fixed asset impairment (net of gains on disposal) | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	7.4
Recognized pre-tax expenses	0.1
Cumulative pre-tax expenses	7.4
Fixed asset impairment (net of gains on disposal) | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	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]
Anticipated 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]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Fixed asset impairment (net of gains on disposal) | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	11.2
Recognized pre-tax expenses	4.4
Cumulative pre-tax expenses	11.2
Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	4.4
Recognized pre-tax expenses	0.6
Cumulative pre-tax expenses	3.2
Accelerated depreciation | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Accelerated depreciation | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	4.4
Recognized pre-tax expenses	0.6
Cumulative pre-tax expenses	3.2
Contract/lease cancellation expenses
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	74.6
Cumulative pre-tax expenses	73.3
Contract/lease cancellation expenses | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.8
Cumulative pre-tax expenses	0.8
Contract/lease cancellation expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.6
Cumulative pre-tax expenses	0.6
Contract/lease cancellation expenses | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.6
Cumulative pre-tax expenses	0.6
Contract/lease cancellation expenses | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Contract/lease cancellation expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	72.6
Cumulative pre-tax expenses	71.3
Consulting/professional fees
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	54.1
Recognized pre-tax expenses	0.2
Cumulative pre-tax expenses	52.8
Consulting/professional fees | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.9
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	0.9
Consulting/professional fees | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.4
Cumulative pre-tax expenses	0.4
Consulting/professional fees | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.1
Cumulative pre-tax expenses	0.1
Consulting/professional fees | Reporting segments | Foodservice
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Consulting/professional fees | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	52.7
Recognized pre-tax expenses	0.2
Cumulative pre-tax expenses	51.4
Other selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	42.6
Recognized pre-tax expenses	1.8
Cumulative pre-tax expenses	36.2
Other selling, general and administrative expenses | Reporting segments | Grocery & Snacks
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	15.0
Recognized pre-tax expenses	1.8
Cumulative pre-tax expenses	13.0
Other selling, general and administrative expenses | Reporting segments | Refrigerated & Frozen
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	3.2
Cumulative pre-tax expenses	3.2
Other selling, general and administrative expenses | Reporting segments | International
Restructuring Cost and Reserve [Line Items]
Anticipated 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]
Anticipated pre-tax expenses	0.0
Cumulative pre-tax expenses	0.0
Other selling, general and administrative expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expenses	24.4
Recognized pre-tax expenses	0.0
Cumulative pre-tax expenses	$ 20.0