| Item | Type | Period | Balance | Description | | Components of Deferred Tax Assets | text | | | |
| Components of Deferred Tax Liabilities | text | | | |
| Deferred Tax Assets, Net | text | | | |
| Valuation Allowance | text | | | |
| text | | | |
| Deferred Tax Liabilities, Net | text | | | |
| Deferred Tax Liabilities, Deferred Expense, Reserves and Accruals | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from reserves and accruals. |
| Deferred Tax Assets, Net of Valuation Allowance | text | | | |
| Deferred Tax Liabilities, Gross, Total | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences. |
| $ | instant | debit | |
| Valuation Allowance, Methodologies and Assumptions | text | | | Describes the methodologies and assumptions on which the valuation allowance is based for deferred tax assets for which it is more likely than not that all or a portion of the deferred tax asset will not be realized. |
| Summary of Valuation Allowance | | duration | | Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance. |
| Business Combination or Joint Venture Formation, Valuation Allowance, Deferred Tax Asset, Effect on Goodwill, Increase (Decrease) | $ | duration | credit | Amount of increase (decrease) in valuation allowance for deferred tax asset acquired in business combination or from joint venture formation, or both, and reported as adjustment to goodwill. Excludes change in valuation allowance outside of measurement period. |
| Business Combination or Joint Venture Formation, Valuation Allowance, Deferred Tax Asset, Effect on Income Tax Expense, Increase (Decrease) | $ | duration | credit | Amount of increase (decrease) in valuation allowance for deferred tax asset acquired in business combination or from joint venture formation, or both, and reported as adjustment to income tax expense. Excludes change in valuation allowance within measurement period. |
| $ | duration | credit | |
| Deferred Tax Assets, Net of Valuation Allowance, Total | $ | instant | debit | Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. |
| Deferred Tax Liabilities, Gross | text | | | |
| Deferred Tax Liabilities, Net, Total | $ | instant | credit | Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. |
| Deferred Tax Assets, Gross | text | | | |
| $ | instant | credit | |
| Deferred Tax Assets, Net of Valuation Allowance, Total | $ | instant | debit | Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. |
| Deferred Tax Asset, Valuation Allowance | text | | | Disclosure of information about valuation allowance representing portion of deferred tax asset for which it is more likely than not that tax benefit will not be realized. |
| Deferred Tax Liabilities, Gross, Total | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences. |
| Deferred Tax Liabilities, Property, Plant and Equipment | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment. |
| $ | instant | credit | |
| Deferred Tax Liabilities, Inventory | $ | instant | credit | Amount of deferred tax consequences attributable to taxable temporary differences derived from inventory. |
| Deferred Tax Liabilities, Other Finite-Lived Assets | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from long-lived assets other than property, plant, and equipment. |
| Deferred Tax Liabilities, Regulatory Assets | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from regulatory assets. |
| Deferred Tax Liabilities, Unrealized Gains on Trading Securities | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from unrealized gains on trading securities. |
| $ | instant | credit | |
| Deferred Tax Liabilities, Regulatory Assets and Liabilities | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from regulatory assets and liabilities. |
| Deferred Tax Liabilities, Other Comprehensive Income | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from unrealized gains in other comprehensive income. |
| Deferred Tax Liabilities, Mortgage Servicing Rights | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from mortgage servicing rights. |
| Deferred Tax Liabilities, Derivatives | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from derivatives. |
| $ | instant | credit | |
| Deferred Tax Liabilities, Interests in Financial Assets Continued to be Held | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from interests in financial instruments continued to be held after sale or transfer of related financial instruments. |
| Deferred Tax Liabilities, Investments | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from investments (excludes investments in subsidiaries and equity method investments). |
| Deferred Tax Liabilities, Investment in Noncontrolled Affiliates | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from investments in unconsolidated subsidiaries and investments in other affiliates which are not controlled nor consolidated. |
| Deferred Tax Liabilities, Undistributed Foreign Earnings | $ | instant | credit | 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. |
| $ | instant | credit | |
| Deferred Tax Liabilities, Financing Arrangements | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from financing arrangements. |
| Deferred Tax Liabilities, Tax Deferred Income | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences from tax deferred revenue or income classified as other. |
| Deferred Tax Liabilities, Deferred Expense | text | | | |
| Deferred Tax Liabilities, Goodwill and Intangible Assets | text | | | |
| $ | instant | credit | |
| Deferred Tax Liabilities, Deferred Expense, Deferred Policy Acquisition Cost | $ | instant | credit | The amount as of the balance sheet date of the estimated future tax effects attributable to policy acquisition costs being expensed for tax purposes but capitalized in conformity with generally accepted accounting principles, which will reverse in future periods when amortization of such capitalized costs cannot be deducted for tax purposes. |
| Deferred Tax Liability, Intra-Entity Transfer, Asset Other than Inventory | $ | instant | credit | Amount of deferred tax liability attributable to intra-entity transfer of asset within consolidated group. Excludes intra-entity transfer of inventory. |
| Deferred Tax Liabilities, Other | $ | instant | credit | Amount of deferred tax liability attributable to taxable temporary differences classified as other. |