Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions |
12 Months Ended | ||
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Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward] | |||
| Unrecognized tax benefits, beginning balance | $ 81.9 | $ 76.1 | $ 70.1 |
| Gross change for current year positions | 1.3 | 5.7 | 5.3 |
| Increases (decreases) for prior period positions | (78.2) | 0.1 | 0.7 |
| Unrecognized tax benefits, ending balance | $ 5.0 | $ 81.9 | $ 76.1 |
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. No definition available.
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- Definition Amount of unrecognized tax benefits. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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