Long-Term Debt Long-Term Debt (Maturities of Long-Term Debt) (Tables)

12 Months Ended

Dec. 31, 2019

Debt Disclosure [Abstract]

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

As of December 31, 2019, principal payments on debt obligations and future minimum rentals on finance lease obligations are as follows (in millions): 

Year	Maturity
2020	$	1.8
2021	2.6
2022	350.3
2023	325.4
2024	0.4
Thereafter	551.0
Total	$	1,231.5