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Restructuring, Impairment, and Other Exit Costs (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Feb. 24, 2019	Nov. 25, 2018	Feb. 25, 2018	Feb. 24, 2019	Feb. 25, 2018
Restructuring and Related Cost [Line Items]
Impairment charges	$ 192.6	$ 192.6		$ 192.6
Payments for other project-related costs				0.3	$ 8.0
Restructuring charges (recoveries), impairment, and other exit costs	59.8		$ 7.6	268.0	27.3
Certain actions [Member]
Restructuring and Related Cost [Line Items]
Expected cash payments for restructuring	30.0
Cash payments for restructuring	0.3
Europe & Australia segment [Member]
Restructuring and Related Cost [Line Items]
Expected net expense of restructuring action	20.0			20.0
Severance costs	11.8
Other restructuring costs	0.4
Europe & Australia segment [Member] \| Severance [Member]
Restructuring and Related Cost [Line Items]
Expected net expense of restructuring action	12.0			12.0
Europe & Australia segment [Member] \| Other Restructuring [Member]
Restructuring and Related Cost [Line Items]
Expected net expense of restructuring action	8.0			8.0
Restructuring actions previously announced [Member]
Restructuring and Related Cost [Line Items]
Cash payments for restructuring				0.0	0.0
Restructuring charges (recoveries), impairment, and other exit costs	(0.2)		$ 7.6	2.2	$ 27.3
Carson, California yogurt manufacturing facility [Member]
Restructuring and Related Cost [Line Items]
Expected net expense of restructuring action	105.0			105.0
Severance costs	9.3
Other restructuring costs	37.3
Carson, California yogurt manufacturing facility [Member] \| Facility Closing [Member]
Restructuring and Related Cost [Line Items]
Expected net expense of restructuring action	2.0			2.0
Carson, California yogurt manufacturing facility [Member] \| Severance [Member]
Restructuring and Related Cost [Line Items]
Expected net expense of restructuring action	13.0			13.0
Carson, California yogurt manufacturing facility [Member] \| Other Restructuring [Member]
Restructuring and Related Cost [Line Items]
Expected net expense of restructuring action	$ 92.0			$ 92.0