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Debt and Credit Agreements Schedule of Maturities of Long-term Debt (Tables) | 12 Months Ended
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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 |

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- Definition Tabular disclosure of the combined aggregate amount of maturities and sinking fund requirements for all long-term borrowings for each of the five years following the date of the latest balance sheet date presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601 + Details
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