Income Taxes - Deferred Tax Assets and Liabilities (Detail) (USD $)
In Millions, unless otherwise specified |
Dec. 31, 2014
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Dec. 31, 2013
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Income Tax Disclosure [Abstract] | ||
Alternative minimum tax and other credit carryforwards | $ 233.4ajg_DeferredTaxAssetsAlternativeMinimumTaxAndOtherCreditCarryforwards | $ 147.4ajg_DeferredTaxAssetsAlternativeMinimumTaxAndOtherCreditCarryforwards |
Accrued and unfunded compensation and employee benefits | 166.9ajg_DeferredTaxAssetsAccruedAndUnfundedCompensationAndEmployeeBenefits | 136.6ajg_DeferredTaxAssetsAccruedAndUnfundedCompensationAndEmployeeBenefits |
Amortizable intangible assets | 66.7us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets | 12.5us-gaap_DeferredTaxAssetsGoodwillAndIntangibleAssets |
Compensation expense related to stock options | 14.7us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost | 14.2us-gaap_DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsShareBasedCompensationCost |
Accrued liabilities | 31.0us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities | 30.2us-gaap_DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities |
Accrued pension liability | 24.3ajg_DeferredTaxAssetsAccruedPensionLiability | 9.2ajg_DeferredTaxAssetsAccruedPensionLiability |
Investments | 10.0us-gaap_DeferredTaxAssetsInvestments | 9.0us-gaap_DeferredTaxAssetsInvestments |
Net operating loss carryforwards | 10.0us-gaap_DeferredTaxAssetsOperatingLossCarryforwards | 11.9us-gaap_DeferredTaxAssetsOperatingLossCarryforwards |
Deferred rent liability | 8.5us-gaap_DeferredRentCreditCurrent | 8.2us-gaap_DeferredRentCreditCurrent |
Other | 4.8us-gaap_DeferredTaxAssetsOther | 6.8us-gaap_DeferredTaxAssetsOther |
Total deferred tax assets | 570.3us-gaap_DeferredTaxAssetsGross | 386.0us-gaap_DeferredTaxAssetsGross |
Valuation allowance for deferred tax assets | (75.5)us-gaap_DeferredTaxAssetsValuationAllowance | (21.3)us-gaap_DeferredTaxAssetsValuationAllowance |
Deferred tax assets | 494.8us-gaap_DeferredTaxAssetsNet | 364.7us-gaap_DeferredTaxAssetsNet |
Nondeductible amortizable intangible assets | 338.7us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets | 184.0us-gaap_DeferredTaxLiabilitiesGoodwillAndIntangibleAssetsIntangibleAssets |
Investment-related partnerships | 26.6ajg_DeferredTaxLiabilitiesInvestmentRelatedPartnerships | 13.2ajg_DeferredTaxLiabilitiesInvestmentRelatedPartnerships |
Depreciable fixed assets | 8.8ajg_DeferredTaxLiabilitiesDepreciableFixedAssets | 5.2ajg_DeferredTaxLiabilitiesDepreciableFixedAssets |
Other prepaid items | 4.3ajg_DeferredTaxLiabilitiesOtherPrepaidItems | 4.7ajg_DeferredTaxLiabilitiesOtherPrepaidItems |
Accrued liabilities | 2.4ajg_DeferredTaxLiabilitiesAccruedLiabilities | |
Total deferred tax liabilities | 378.4us-gaap_DeferredTaxLiabilities | 209.5us-gaap_DeferredTaxLiabilities |
Net deferred tax assets | $ 116.4us-gaap_DeferredTaxAssetsLiabilitiesNet | $ 155.2us-gaap_DeferredTaxAssetsLiabilitiesNet |
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- Definition
Deferred Tax Assets, Accrued and unfunded compensation and employee benefits. No definition available.
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- Definition
Deferred tax assets, accrued pension liability No definition available.
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- Definition
Deferred Tax Assets, Alternative minimum tax and other credit carryforwards. No definition available.
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- Definition
Deferred tax liabilities, accrued liabilities No definition available.
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- Definition
Deferred tax liabilities, depreciable fixed assets No definition available.
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- Definition
Deferred tax liabilities, investment-related partnerships No definition available.
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- Definition
Deferred tax liabilities, other prepaid items No definition available.
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- Definition
For a classified balance sheet, the cumulative difference as of the balance sheet date between the payments required by a lease agreement and the rental income or expense recognized on a straight-line basis, or other systematic and rational basis more representative of the time pattern in which use or benefit is granted or derived from the leased property, expected to be recognized in income or expense, by the lessor or lessee, respectively, within one year of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from intangible assets including goodwill. No definition available.
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from investments (excludes investments in subsidiaries and equity method investments). No definition available.
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards, net of deferred tax liability attributable to taxable temporary differences. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible operating loss carryforwards. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences not separately disclosed. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from share-based compensation. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from accrued liabilities. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Details
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