Business, Basis of Presentation and Summary of Significant Accounting Policies Discontinued Operations (Details)	Aug. 04, 2017 shares
Brighthouse Financial, Inc
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Brighthouse common stock issued	96,776,670

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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