Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets, Net of Accumulated Amortization (Narrative) (Details)

v3.10.0.1
Goodwill and Intangible Assets, Net of Accumulated Amortization (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Aug. 31, 2018
Aug. 31, 2017
May 31, 2018
[1]
Goodwill and Intangible Assets, Net of Accumulated Amortization [Abstract]      
Goodwill $ 813.3   $ 814.0
Amortization expense $ 6.5 $ 3.9  
[1] Amounts have been adjusted to reflect the adoption of ASC Topic 606.