Goodwill and Intangible Assets, Net of Accumulated Amortization (Tables)

12 Months Ended

May 31, 2017

Goodwill and Intangible Assets, Net of Accumulated Amortization [Abstract]

Components of Intangible Assets, at Cost

	May 31,
In millions	2017		2016
Client lists	$	293.5	$	289.2
Other intangible assets		5.4		5.4
Total intangible assets, gross		298.9		294.6
Less: Accumulated amortization		241.3		225.1
Intangible assets, net of accumulated amortization	$	57.6	$	69.5

Estimated Amortization Expense

In millions	Estimated amortization
Year ending May 31,	expense
2018	$	15.4
2019		12.3
2020		9.5
2021		7.3
2022		5.2