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Operating Leases
 12 Months Ended
May 31, 2014
Leases [Abstract]  
Leases of Lessee Disclosure
Operating Leases

The company leases real property and equipment under agreements that expire on various dates. Certain leases contain renewal provisions and generally require the company to pay utilities, insurance, taxes, and other operating expenses.

Future minimum rental payments required under operating leases that have non-cancelable lease terms as of May 31, 2014, are as follows:
(In millions)
 
2015
$
21.0

2016
$
17.0

2017
$
11.8

2018
$
9.8

2019
$
7.1

Thereafter
$
18.7



Total rental expense charged to operations was $25.6 million, $23.0 million, and $20.7 million, in fiscal 2014, 2013, and 2012, respectively. Substantially all such rental expense represented the minimum rental payments under operating leases.