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Leases (Tables)
12 Months Ended
Dec. 31, 2015
Leases [Abstract]  
Future minimum rental obligations under non-cancelable operating leases
Future minimum rental obligations under non-cancelable operating leases, as of December 31, 2015, are payable as follows:
(in millions)
 
2016
$
38.0

2017
26.6

2018
21.2

2019
17.6

2020
15.0

Thereafter
23.7

Total
$
142.1