RESTRUCTURING ACTIVITIES (Consolidated Amounts) (Details) - SCAE Plan - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Nov. 29, 2015	Nov. 23, 2014	Nov. 29, 2015	Nov. 23, 2014
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	$ 472.9		$ 472.9
Recognized pre-tax expense	133.0	$ 10.3	150.4	$ 26.0
Cumulative pre-tax expense	229.4		229.4
Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	369.5		369.5
Recognized pre-tax expense	123.5		134.2
Cumulative pre-tax expense	151.8		151.8
Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	95.3		95.3
Recognized pre-tax expense	9.5		16.1
Cumulative pre-tax expense	69.5		69.5
Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	8.1		8.1
Recognized pre-tax expense	0.0		0.1
Cumulative pre-tax expense	8.1		8.1
Total cost of goods sold
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	47.1		47.1
Recognized pre-tax expense	5.7		9.5
Cumulative pre-tax expense	35.6		35.6
Total cost of goods sold | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	1.2		1.2
Recognized pre-tax expense	0.1		0.2
Cumulative pre-tax expense	1.2		1.2
Total cost of goods sold | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	45.9		45.9
Recognized pre-tax expense	5.6		9.3
Cumulative pre-tax expense	34.4		34.4
Total cost of goods sold | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Recognized pre-tax expense	0.0		0.0
Cumulative pre-tax expense	0.0		0.0
Multi-employer pension costs
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	1.5		1.5
Cumulative pre-tax expense	1.5		1.5
Multi-employer pension costs | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Cumulative pre-tax expense	0.0		0.0
Multi-employer pension costs | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	1.5		1.5
Cumulative pre-tax expense	1.5		1.5
Multi-employer pension costs | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Cumulative pre-tax expense	0.0		0.0
Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	39.5		39.5
Recognized pre-tax expense	5.4		9.1
Cumulative pre-tax expense	31.6		31.6
Accelerated depreciation | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	1.2		1.2
Recognized pre-tax expense	0.1		0.2
Cumulative pre-tax expense	1.2		1.2
Accelerated depreciation | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	38.3		38.3
Recognized pre-tax expense	5.3		8.9
Cumulative pre-tax expense	$ 30.4		$ 30.4
Accelerated depreciation | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense
Recognized pre-tax expense	$ 0.0		$ 0.0
Cumulative pre-tax expense	0.0		0.0
Other cost of goods sold
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	6.1		6.1
Recognized pre-tax expense	0.3		0.4
Cumulative pre-tax expense	2.5		2.5
Other cost of goods sold | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Recognized pre-tax expense	0.0		0.0
Cumulative pre-tax expense	0.0		0.0
Other cost of goods sold | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	6.1		6.1
Recognized pre-tax expense	0.3		0.4
Cumulative pre-tax expense	2.5		2.5
Other cost of goods sold | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Recognized pre-tax expense	0.0		0.0
Cumulative pre-tax expense	0.0		0.0
Total selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	425.8		425.8
Recognized pre-tax expense	127.3		140.9
Cumulative pre-tax expense	193.8		193.8
Total selling, general and administrative expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	368.3		368.3
Recognized pre-tax expense	123.4		134.0
Cumulative pre-tax expense	150.6		150.6
Total selling, general and administrative expenses | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	49.4		49.4
Recognized pre-tax expense	3.9		6.8
Cumulative pre-tax expense	35.1		35.1
Total selling, general and administrative expenses | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	8.1		8.1
Recognized pre-tax expense	0.0		0.1
Cumulative pre-tax expense	8.1		8.1
Severance and related costs (recoveries)
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	222.9		222.9
Recognized pre-tax expense	56.1		60.6
Cumulative pre-tax expense	98.0		98.0
Severance and related costs (recoveries) | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	184.5		184.5
Recognized pre-tax expense	51.8		55.4
Cumulative pre-tax expense	63.2		63.2
Severance and related costs (recoveries) | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	30.3		30.3
Recognized pre-tax expense	4.3		5.1
Cumulative pre-tax expense	26.7		26.7
Severance and related costs (recoveries) | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	8.1		8.1
Recognized pre-tax expense	0.0		0.1
Cumulative pre-tax expense	8.1		8.1
Fixed asset impairment/Net gain on disposal
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	1.0		1.0
Recognized pre-tax expense			(0.1)
Cumulative pre-tax expense	1.0		1.0
Fixed asset impairment/Net gain on disposal | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Recognized pre-tax expense			0.0
Cumulative pre-tax expense	0.0		0.0
Fixed asset impairment/Net gain on disposal | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	1.0		1.0
Recognized pre-tax expense			(0.1)
Cumulative pre-tax expense	1.0		1.0
Fixed asset impairment/Net gain on disposal | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Recognized pre-tax expense			0.0
Cumulative pre-tax expense	0.0		0.0
Accelerated depreciation
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	1.5		1.5
Recognized pre-tax expense	0.1		0.1
Cumulative pre-tax expense	0.9		0.9
Accelerated depreciation | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	1.5		1.5
Recognized pre-tax expense	0.1		0.1
Cumulative pre-tax expense	0.9		0.9
Accelerated depreciation | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Recognized pre-tax expense	0.0		0.0
Cumulative pre-tax expense	0.0		0.0
Accelerated depreciation | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Recognized pre-tax expense	0.0		0.0
Cumulative pre-tax expense	0.0		0.0
Contract/Lease cancellation expenses
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	60.6		60.6
Recognized pre-tax expense	50.9		51.1
Cumulative pre-tax expense	52.8		52.8
Contract/Lease cancellation expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	59.1		59.1
Recognized pre-tax expense	51.8		51.8
Cumulative pre-tax expense	52.1		52.1
Contract/Lease cancellation expenses | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	1.5		1.5
Recognized pre-tax expense	(0.9)		(0.7)
Cumulative pre-tax expense	0.7		0.7
Contract/Lease cancellation expenses | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Recognized pre-tax expense	0.0		0.0
Cumulative pre-tax expense	0.0		0.0
Consulting/Professional fees
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	66.9		66.9
Recognized pre-tax expense	18.9		25.2
Cumulative pre-tax expense	29.0		29.0
Consulting/Professional fees | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	65.9		65.9
Recognized pre-tax expense	18.9		25.2
Cumulative pre-tax expense	28.0		28.0
Consulting/Professional fees | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	1.0		1.0
Recognized pre-tax expense	0.0		0.0
Cumulative pre-tax expense	1.0		1.0
Consulting/Professional fees | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Recognized pre-tax expense	0.0		0.0
Cumulative pre-tax expense	0.0		0.0
Other selling, general and administrative expenses
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	72.9		72.9
Recognized pre-tax expense	1.3		4.0
Cumulative pre-tax expense	12.1		12.1
Other selling, general and administrative expenses | Corporate
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	57.3		57.3
Recognized pre-tax expense	0.8		1.5
Cumulative pre-tax expense	6.4		6.4
Other selling, general and administrative expenses | Consumer Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	15.6		15.6
Recognized pre-tax expense	0.5		2.5
Cumulative pre-tax expense	5.7		5.7
Other selling, general and administrative expenses | Commercial Foods | Reporting segments
Restructuring Cost and Reserve [Line Items]
Anticipated pre-tax expense	0.0		0.0
Recognized pre-tax expense	0.0		0.0
Cumulative pre-tax expense	$ 0.0		$ 0.0