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Income Taxes - Additional Information (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Income Tax [Line Items] |  |  |
Unrealized excess tax benefits | $ 29.6 | $ 25.4 |
Tax loss and credit carryforwards of certain foreign subsidiaries | 115.1 | 121.4 |
Amount of tax loss and credit carryforwards that will expire between 2017 and 2026 | 81.5 |  |
Amount of tax loss and credit carryforwards that can be carried forward indefinitely | 33.6 |  |
Domestic foreign tax credit carryforwards | 99.6 | 76.7 |
State tax loss carryforwards | 0.8 |  |
Increase in deferred tax assets tax credit carryforwards foreign | $ 22.9 |  |
Percentage of domestic source income reclassified as foreign source income | 50.00% |  |
Deferred tax assets tax credit carryforwards foreign resulting from overall domestic loss | $ 25.7 |  |
Valuation allowance | 115.4 | 121.3 |
Valuation allowance, deferred tax asset, change in amount | 5.9 | 208.7 | $ 82.4
Reductions charged to income tax expenses | (5.6) | (205.6) | 85.7
Other comprehensive income (loss), foreign currency translation gain (loss) arising during period, tax | 0.3 | 3.1 | (3.3)
Unremitted earnings that were permanently reinvested relating to operating subsidiaries | 2,500.0 |  |
Deferred tax asset on unremitted foreign earnings |  | 6.4 |
Deferred tax liability on unremitted foreign earnings | $ 5.5 |  |
Effective tax rate applied | 35.00% |  |
Total amount of unrecognized tax benefits, including related interest and penalties | $ 62.0 | 58.0 | 47.2
Unrecognized tax benefits excluding interest and penalties that if recognized would affect the effective tax rate | 44.8 | 44.1 |
Total accrued interest for tax contingencies | 9.4 | 7.1 | 5.5
Total accrued penalties for tax contingencies | 2.1 | 1.5 | 1.1
Increase in interest expense related to uncertain tax positions | 2.7 | 2.0 | 1.9
Increase in penalties to uncertain tax positions | 0.7 | $ 0.6 | $ 0.3
Amount of unrecognized tax benefits that could decrease within the next 12 months | 11.0 |  |
Decrease in unrecognized tax benefits due to the settlement of audits or resolution of administrative or judicial proceedings | 5.5 |  |
Decrease in unrecognized tax benefits expiration of statute of limitations | $ 5.5 |  |
Earliest Tax Year [Member] |  |  |
Income Tax [Line Items] |  |  |
Open tax years by major tax jurisdiction | 2009 |  |
Domestic [Member] |  |  |
Income Tax [Line Items] |  |  |
Domestic research and development tax credit carryforward | $ 2.2 |  |
State [Member] | Earliest Tax Year [Member] |  |  |
Income Tax [Line Items] |  |  |
Expiration year of tax loss carryforwards | 2021 |  |
State [Member] | Latest Tax Year [Member] |  |  |
Income Tax [Line Items] |  |  |
Expiration year of tax loss carryforwards | 2036 |  |
United States [Member] |  |  |
Income Tax [Line Items] |  |  |
Unremitted earnings that were permanently reinvested | $ 131.9 |  |
Carryforwards expiring in 2021 [Member] |  |  |
Income Tax [Line Items] |  |  |
Expiration date of tax credit carryforwards | Dec. 31, 2021 |  |
Carryforwards expiring in 2026 [Member] |  |  |
Income Tax [Line Items] |  |  |
Expiration date of tax credit carryforwards | Dec. 31, 2026 |  |
Carryforwards expiring in 2024 [Member] |  |  |
Income Tax [Line Items] |  |  |
Expiration date of tax credit carryforwards | Dec. 31, 2024 |  |
Research and Development [Member] | Domestic [Member] |  |  |
Income Tax [Line Items] |  |  |
Expiration year of tax credit carryforwards | 2036 |  |

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