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Derivatives and Hedging Activities - Effect of Derivative Instruments on Condensed Consolidated Statements of Operations (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Derivative Instruments Gain Loss [Line Items] |  |  |
Gain (loss) on interest rate and currency swaps | $ (52.3) | $ 67.8 | $ 17.7
Interest expenses | 213.1 | 227.7 | 287.7
Interest Rate and Currency Swap [Member] | Designated as Hedging Instruments [Member] |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Gain (loss) on interest rate and currency swaps | 20.8 | 31.6 | 16.5
Interest expenses | $ 5.1 | $ 5.9 | $ 3.0

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5618551-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (a),(c),(d),(e) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624171-113959 + Details
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