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Debt And Credit Arrangements Tables (Tables) | 12 Months Ended
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Dec. 31, 2017
Debt Instrument [Line Items] |
Schedule of Debt [Table Text Block] | The following table represents the components of our borrowings:
| December 31,
| 2017 |  | 2016
Convertible notes due November 2024: |  |  |
Principal amount | $ | 258.8 |  |  | $ | — |
Unamortized discount | (57.6 | ) |  | — |
Unamortized debt issuance costs | (5.1 | ) |  | — |
Convertible notes due November 2024, net of unamortized discount and debt issuance costs | 196.1 |  |  | — |
Convertible notes due August 2018: |  |  |
Principal amount | 57.1 |  |  | 250.0 |
Unamortized discount | (1.9 | ) |  | (21.9 | )
Unamortized debt issuance costs | (0.1 | ) |  | (1.1 | )
Convertible notes due August 2018, net of unamortized discount and debt issuance costs | 55.1 |  |  | 227.0 |
Senior secured revolving credit facility due November 2022 | 239.0 |  |  | — |
Foreign facilities | 7.9 |  |  | 13.2 |
Total debt, net of unamortized discount and debt issuance costs | 498.1 |  |  | 240.2 |
Less: current maturities (1) | (58.9 | ) |  | (6.5 | )
Long-term debt | $ | 439.2 |  |  | $ | 233.7 |
_______________
(1) | Current maturities at December 31, 2017 includes $55.1 of Convertible notes due August 2018, net of unamortized discount and debt issuance costs.
Schedule of Maturities of Long-term Debt [Table Text Block] | annual maturities of debt at December 31, 2017, are as follows:
Year | Amount
2018 (1) | $ | 60.9 |
2019 | 4.1 |
2022 | 239.0 |
Thereafter | 258.8 |
Total | $ | 562.8 |
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(1) | Includes the $57.1 fully accreted amount of our 2018 Notes and $3.8 current maturities related to foreign facilities.
Cash paid for
Convertible Notes, due 2024 [Member] |
Debt Instrument [Line Items] |
Schedule of Interest Accretion, Loss on Extinguishment, and Amortization of Financing Costs [Table Text Block] | The following table summarizes interest accretion of the 2024 Notes discount, 1.0% contractual interest coupon and financing costs amortization associated with the 2024 Notes:
| Year Ended December 31, 2017
2024 Notes, interest accretion of convertible notes discount | $ | 1.1 |
2024 Notes, 1.0% contractual interest coupon | 0.4 |
2024 Notes, total interest expense | $ | 1.5 |
2024 Notes, financing costs amortization | $ | 0.1 |
Convertible Notes, Due 2018 [Member] |
Debt Instrument [Line Items] |
Schedule of Interest Accretion, Loss on Extinguishment, and Amortization of Financing Costs [Table Text Block] | The following table summarizes interest accretion of the 2018 Notes discount, 2.0% contractual interest coupon, loss on extinguishment of debt and financing costs amortization associated with the 2018 Notes:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
2018 Notes, interest accretion of convertible notes discount | $ | 11.8 |  |  | $ | 12.5 |  |  | $ | 11.5 |
2018 Notes, 2.0% contractual interest coupon | 4.3 |  |  | 5.0 |  |  | 5.0 |
2018 Notes, total interest expense | $ | 16.1 |  |  | $ | 17.5 |  |  | $ | 16.5 |
2018 Notes, loss on extinguishment of debt, bond cost portion | 4.3 |  |  | — |  |  | — |
2018 Notes, write off of unamortized debt issuance costs | 0.4 |  |  | — |  |  | — |
2018 Notes, total loss on extinguishment of debt (1) | $ | 4.7 |  |  | $ | — |  |  | $ | — |
2018 Notes, financing costs amortization | $ | 0.6 |  |  | $ | 0.7 |  |  | $ | 0.7 |

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