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Income Taxes - Schedule of Unrecognized Tax Benefits (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Activity related to unrecognized tax benefit |  |  |
Balance at the beginning of the period | $ 16.7 | $ 25.3 | $ 43.1
Additions based on tax positions related to the current year | 5.3 | 7.3 | 1.7
(Reductions) additions for tax positions of prior years | (6.1) | (11.1) | (16.6)
Expiration of the statute of limitations for the assessment of taxes | (4.8) | (4.2) | (0.6)
Other, including currency translation | 1.2 | (0.6) | (2.3)
Balance at the end of the period | $ 12.3 | $ 16.7 | $ 25.3

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- Definition Unrecognized tax benefits increases decreases resulting from prior period tax positions. + References No definition available. + Details
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- Definition The amount of other increases and decreases in unrecognized tax benefits during the period. + References No definition available. + Details
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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. + References No definition available. + Details
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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=84230637&loc=SL6600010-109319 + Details
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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. + 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)(2) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from lapses of applicable statutes of limitations. + 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)(4) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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