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Income Taxes - Valuation allowance (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Valuation allowance |  |  |
Valuation allowance | $ 7.1 | $ 9.5 |
Provision for income taxes | 43.6 | 1.9 | $ 32.8
Undistributed earnings of the Company's foreign subsidiaries | 346.1 | 366.1 | $ 386.0
U.S. |  |  |
Valuation allowance |  |  |
Valuation allowance | 1.5 | 3.6 |
Provision for income taxes | 0.0 |  |
Austria |  |  |
Valuation allowance |  |  |
Valuation allowance | $ 5.7 | $ 5.9 |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32537-109319 + Details
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