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Subsequent Event	3 Months Ended
Subsequent Event	Mar. 31, 2018
Subsequent Events [Abstract]
Subsequent Events	12. Subsequent Event Repurchase Agreement In April 2018, Brighthouse Life Insurance Company entered into a committed repurchase facility (the “Repurchase Facility”) with a financial institution, pursuant to which Brighthouse Life Insurance Company may enter into repurchase transactions in an aggregate amount up to $2.0 billion in respect of certain eligible securities. The Repurchase Facility has a term of three years, beginning on July 31, 2018 and ending on July 31, 2021.