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Accumulated Other Comprehensive Income (Loss) - Details of Comprehensive Income (Loss) (Parenthetical) (Detail) - USD ($) $ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Accumulated Other Comprehensive Income Loss Net Of Tax [Abstract] |  |  |
Increase decrease in unrecognized pension items | $ 21.8 | $ 13.6 | $ 2.9
Increase decrease in unrealized gain (losses) on cash flow hedging instruments | 2.0 | 1.0 | 0.4
Increase decrease in cumulative translation adjustment | $ 19.8 | $ 12.6 | $ 3.3

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- Definition Increase decrease in unrealized gain loss on Cash flow hedging instruments. + References No definition available. + Details
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- Definition The increase (decrease) in cumulative translation adjustment before transfers included in determining net income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 30 -Section 45 -Paragraph 20 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=6915805&loc=d3e32211-110900 + Details
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