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Leases (Tables)
12 Months Ended
Dec. 31, 2016
Leases [Abstract]  
Future Minimum Rental Obligations Under Non-Cancelable Operating Leases
Future minimum rental obligations under non-cancelable operating leases as of December 31, 2016 are payable as follows:
(in millions)
 
2017
$
19.9

2018
14.4

2019
12.7

2020
11.7

2021
11.2

Thereafter
27.5

Total
$
97.4