Income Taxes - Components of Aon's deferred tax assets and liabilities (Details) - USD ($) $ in Millions |
Dec. 31, 2020 |
Dec. 31, 2019 |
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Deferred tax assets: | ||
Net operating loss, capital loss, interest, and tax credit carryforwards | $ 653 | $ 440 |
Employee benefit plans | 312 | 373 |
Lease liabilities | 248 | 247 |
Other accrued expenses | 103 | 68 |
Deferred revenue | 36 | 24 |
Investment basis differences | 28 | 28 |
Lease and service guarantees | 2 | 3 |
Accrued interest | 0 | 116 |
Other | 54 | 57 |
Total | 1,436 | 1,356 |
Valuation allowance on deferred tax assets | (205) | (200) |
Total | 1,231 | 1,156 |
Deferred tax liabilities: | ||
Intangibles and property, plant and equipment | (291) | (251) |
Lease right-of-use asset | (211) | (219) |
Deferred costs | (141) | (128) |
Unremitted earnings | (37) | (28) |
Unrealized foreign exchange gains | (26) | (26) |
Other accrued expenses | (22) | (25) |
Other | (41) | (33) |
Total | (769) | (710) |
Net deferred tax asset | $ 462 | $ 446 |
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- Definition Deferred Tax Assets, Accrued Interest No definition available.
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- Definition Deferred Tax Assets, Lease Guarantees No definition available.
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- Definition Deferred Tax Assets, Lease Liability No definition available.
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- Definition The sum of the tax effects as of the balance sheet date of the amount of (1) excess of tax deductions over gross income in a year which cannot be used on the tax returns in the current year but can be carried forward to reduce taxable income or income taxes payable in a future year, for which there must be sufficient tax-basis income to utilize a portion or all of the carryforward amount to realize the deferred tax asset, and capital losses that cannot be utilized on the tax return during a period that have been carried forward to reduce taxable income or taxes payable in a future year and (2) future tax deductions arising from all unused tax credit carryforwards which have been reduced by a valuation allowance. No definition available.
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from intangible assets other than goodwill and from property, plant, and equipment. No definition available.
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- Definition Deferred Tax Liabilities, Lease Right-of-Use Asset No definition available.
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- Definition The cumulative amount of the estimated future tax effects attributable to other accrued expenses not otherwise specified in this taxonomy that were expensed for tax purposes but capitalized in conformity with generally accepted accounting principles. No definition available.
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- References No definition available.
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- References No definition available.
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- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences from deferred income. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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/disclosureRef
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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 and deferred tax liability, of deferred tax asset attributable to deductible differences and carryforwards, without jurisdictional netting. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from employee benefits, classified as other. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount, before allocation of valuation allowance, of deferred tax asset attributable to deductible temporary differences from reserves and accruals, classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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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/disclosureRef
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- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from tax deferred revenue or income classified as other. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiary and other recognized entity not within country of domicile. Includes, but is not limited to, other basis differences. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of deferred tax liability attributable to taxable temporary differences from unrealized gains on foreign currency transactions. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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