Debt and Credit Agreements Schedule of Maturities of Long-term Debt (Tables)

12 Months Ended

Dec. 31, 2017

Long-term Debt, Fiscal Year Maturity [Abstract]

Schedule of Maturities of Long-term Debt [Table Text Block]

Annual maturities are scheduled as follows based on the book value as of December 31, 2017.

2018	$	2.0
2019	3.1
2020	1.0
2021	0.0
2022	247.6
Thereafter	1,033.9
Total long-term debt	$	1,287.6