Leases (Tables)

12 Months Ended

Dec. 31, 2018

Leases [Abstract]

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

Minimum future obligations on leases in effect at December 31, 2018 were: 

	Operating
(in millions)	Leases
2019	$	7.7
2020	6.7
2021	6.0
2022	5.6
2023	4.7
Thereafter	30.6
Total minimum obligations	$	61.3