Employee Benefit Plans (Details) - Schedule of change in fair value of plan assets - USD ($) $ in Millions		12 Months Ended
	Feb. 14, 2018	May 31, 2018	May 31, 2017
Other Postretirement Benefits [Member]
Change in plan assets:
Fair value of plan assets at beginning of year		$ 0.0	$ 0.0
Actual return on plan assets		0.0	0.0
Employer contributions		2.0	2.2
Settlement		0.0	0.0
Benefits paid, including expenses		(2.4)	(2.4)
Plan participants’ contributions		0.4	0.2
Foreign currency translation		0.0	0.0
Fair value of plan assets at end of year		0.0	0.0
Pension Plans [Member]
Change in plan assets:
Fair value of plan assets at beginning of year		161.7
Settlement		0.0	0.0
Fair value of plan assets at end of year		32.4	161.7
U.S. [Member] | Pension Plans [Member]
Change in plan assets:
Fair value of plan assets at beginning of year		132.5	135.1
Actual return on plan assets		0.5	7.0
Employer contributions		0.0	0.0
Settlement	$ (86.3)	(125.2)	0.0
Benefits paid, including expenses		(6.2)	(9.6)
Plan participants’ contributions		0.0	0.0
Foreign currency translation		0.0	0.0
Fair value of plan assets at end of year		1.6	132.5
U.K. [Member] | Pension Plans [Member]
Change in plan assets:
Fair value of plan assets at beginning of year		29.2	29.1
Actual return on plan assets		1.7	3.5
Employer contributions		1.1	1.1
Benefits paid, including expenses		(2.1)	(1.3)
Plan participants’ contributions		0.0	0.0
Foreign currency translation		0.9	(3.2)
Fair value of plan assets at end of year		$ 30.8	$ 29.2