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Management of Capital (Tables) | 12 Months Ended
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Dec. 31, 2017
Disclosure of objectives, policies and processes for managing capital [abstract] |
Schedule of Managed Capital |
| December 31, 2017 | December 31, 2016
Shareholder's equity | $2,681.2 |  | $1,759.4 |
Current portion of debt and financing obligations | 4.2 |  | 3.6 |
Long-term debt and financing obligations | 3.3 |  | 301.3 |
| $2,688.7 |  | $2,064.3 |

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