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Commitments and Contingencies Commitments and Contingencies (Tables)
12 Months Ended
Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract]  
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]
Future estimated minimum lease payments and expected lease administration payments follow (in millions):
2017
$
3.1

2018
2.4

2019
1.6

2020
0.9

2021
0.9

Thereafter
5.7

 
$
14.6