Basis of Presentation (Details) - USD ($) $ in Millions	6 Months Ended
	Nov. 30, 2019	Jun. 01, 2019	May 31, 2019
New accounting pronouncements adopted
Revenue, practical expedient application of ASC 606	true
Assets of discontinued operations		$ 55.8	$ 29.2
Other current assets	$ 71.9	35.7	36.2
Intangible assets, net	12.6	13.7	22.2
Operating lease ROU assets	103.8	96.6
Other non-current assets	89.6	75.7	77.5
Accrued liabilities	133.2	150.5	140.5
Liabilities of discontinued operations	41.9	54.5	29.2
Operating lease liabilities	84.0	77.7
Other liabilities	24.1	25.2	28.3
Retained earnings	725.4	712.3	709.8
Unamortized deferred gains		2.5
Deferred revenue on long-term contracts	$ 122.5		$ 83.8
Held for sale or Disposed
New accounting pronouncements adopted
Operating lease liabilities		25.3
ASC 842
New accounting pronouncements adopted
Assets of discontinued operations		26.6
Other current assets		(0.5)
Intangible assets, net		(8.5)
Operating lease ROU assets		96.6
Other non-current assets		(1.8)
Accrued liabilities		10.0
Liabilities of discontinued operations		25.3
Operating lease liabilities		77.7
Other liabilities		(3.1)
Retained earnings		2.5
ASC 842 | Right of use including discontinued operations
New accounting pronouncements adopted
Operating lease ROU assets		123.2
Operating lease liabilities		116.8
ASC 842 | Held for sale or Disposed
New accounting pronouncements adopted
Operating lease ROU assets		$ 26.6