Wells Fargo Annualized New Business Premiums

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date.

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Amount of investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier.

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Commitments and Contingent Liabilities (Narrative) (Details) - USD ($) $ in Millions	31 Months Ended
	Dec. 31, 2016	Dec. 31, 2018	Dec. 31, 2017	Jul. 31, 2017
Commitments and Contingent Liabilities [Line Items]
Litigation and regulatory matters loss contingency, range of possible loss, maximum (less than)		$ 100
Total annualized new business premiums associated with sales through Well Fargo	$ 4
Commitments \| Commercial mortgage loans
Commitments and Contingent Liabilities [Line Items]
Total outstanding commercial mortgage loan commitments		14	$ 15
Commitments \| Investments
Commitments and Contingent Liabilities [Line Items]
Commitments to purchase investment (excluding commercial mortgage loans)		$ 257	$ 196
Indonesia
Commitments and Contingent Liabilities [Line Items]
Joint Venture with CT Corp, Ownership Percentage				49.00%