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Income Taxes (Details 5) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Reconciliation of the unrecognized tax benefits |  |  |
Balance beginning of year | $ 49.0 | $ 55.5 | $ 45.2
Increase based on prior year tax positions | 0.0 | 0.0 | 0.5
Decrease based on prior year tax positions | 0.0 | 0.0 | 0.0
Increases in current year tax positions | 0.0 | 9.8 | 9.8
Settlements | 0.0 | 0.0 | 0.0
Reductions related to expirations of statute of limitations | (4.9) | (16.3) | 0.0
Balance end of year | $ 44.1 | $ 49.0 | $ 55.5

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
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