Leases (Tables)

12 Months Ended

Dec. 31, 2017

Leases [Abstract]

Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]

Minimum future obligations on leases in effect at December 31, 2017 were: 

	Operating
(in millions)	Leases
2018	$	10.9
2019	7.4
2020	5.5
2021	5.1
2022	3.9
Thereafter	28.0
Total minimum obligations	$	60.8