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Income Taxes - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Tax Note Textuals [Line Items] |  |  |  |
Unrecognized Tax Benefits Impact on Effective Tax Rate | $ (13.0) |  |  |
Tax Matters Agreement Receivable, Continuing Operations | 1.6 |  |  |
Tax Matters Agreement Receivable, Discontinued Operations | 13.2 |  |  |
Additional deferred tax liability | (21.5) |  |  |
Deferred taxes not provided for excess of financial reporting over tax basis of investments in foreign subsidiaries | 809.7 |  |  |
Cash and Cash Equivalents | 415.7 | $ 584.0 | $ 507.3 | $ 544.5
Income Tax Holiday, Aggregate Dollar Amount | $ (4.1) |  |  |
Income Tax Holiday, Income Tax Benefits Per Share | $ (0.05) |  |  |
Deferred income tax benefit | $ 70.1 | 71.3 | $ (309.6) |
Net operating loss carryforwards in Luxembourg | 191.9 |  |  |
Excess income tax benefit from stock-based compensation | $ 3.4 | 10.4 |  |
The tax benefits recognized in the Consolidated Financial Statements from such positions are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement | The tax benefits recognized in the Consolidated Financial Statements from such positions are measured based on the largest benefit that has a greater than 50% likelihood of being realized upon ultimate settlement. |  |  |
Estimated change in unrecognized tax benefits | $ 16.0 |  |  |
Interest (income) expense related to tax matters | (5.7) | 0.8 |  |
Interest accrued from income tax examinations | 9.8 | $ 19.4 |  |
Tax Matters Agreement Receivable, Total | 14.8 |  |  |
Continuing Operations [Member] |  |  |  |
Tax Note Textuals [Line Items] |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions | 18.0 |  |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 38.2 |  |  |
Discontinued Operations [Member] |  |  |  |
Tax Note Textuals [Line Items] |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions | 20.9 |  |  |
Unrecognized Tax Benefits that Would Impact Effective Tax Rate | 3.7 |  |  |
Foreign net operating losses [Member] |  |  |  |
Tax Note Textuals [Line Items] |  |  |  |
Decrease in valuation allowance | 11.4 |  |  |
Non US Subsidiaries [Member] |  |  |  |
Tax Note Textuals [Line Items] |  |  |  |
Cash and Cash Equivalents | 432.7 |  |  |
Tax Benefit from Audit Adjustments [Member] | Continuing Operations [Member] |  |  |  |
Tax Note Textuals [Line Items] |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions | 8.0 |  |  |
Tax Benefit from Audit Adjustments [Member] | Discontinued Operations [Member] |  |  |  |
Tax Note Textuals [Line Items] |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions | 17.4 |  |  |
Recognition of Previously Unrecognized Tax Position [Member] | Continuing Operations [Member] |  |  |  |
Tax Note Textuals [Line Items] |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions | 10.0 |  |  |
Recognition of Previously Unrecognized Tax Position [Member] | Discontinued Operations [Member] |  |  |  |
Tax Note Textuals [Line Items] |  |  |  |
Tax Adjustments, Settlements, and Unusual Provisions | $ 38.3 |  |  |

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- Definition Amount of increase (decrease) to previously recorded tax expense. Includes, but is not limited to, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, and IRS tax settlement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=51675352&loc=d3e28446-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51675352&loc=d3e28511-109314 + Details
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