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Debt and Credit Agreements Schedule of Maturities of Long-term Debt (Tables)
12 Months Ended
Dec. 31, 2018
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, 2018.
2019
$
0.1

2020
496.9

2021
896.8

2022
248.2

2023
497.7

Thereafter
1,520.6

Total long-term debt
$
3,660.3