v3.21.2

Investments (Changes in Net Unrealized Investment Gains (Losses)) (Details) $ in Millions	6 Months Ended
	Jun. 30, 2021 USD ($)
Investments, Debt and Equity Securities [Abstract]
Unrealized investment gains (losses), beginning of period	$ 258
Unrealized investment gains (losses) during the period	(86)
Unrealized investment gains (losses) relating to: Future policy benefits	6
Unrealized investment gains (losses) relating to: DAC and DSI	1
Unrealized investment gains (losses) relating to: Deferred income tax benefit (expense)	16
Unrealized investment gains (losses), end of period	195
Change in net unrealized investment gains (losses)	$ (63)

This item presents the increase (decrease) in net unrealized investment gains (losses) attributable to the Company.

+ References

No definition available.

+ Details

Name:	bhny_ChangesInNetUnrealizedInvestmentGainsLossesAttributableToCompany
Namespace Prefix:	bhny_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This item presents the increase (decrease) in net unrealized investment gains (losses) related to DAC and VOBA.

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No definition available.

+ Details

Name:	bhny_ChangesInNetUnrealizedInvestmentGainsLossesRelatedToDacAndVoba
Namespace Prefix:	bhny_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This item presents the increase (decrease) in net unrealized investment gains (losses) related to insurance liability gain (loss) recognition.

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No definition available.

+ Details

Name:	bhny_ChangesInNetUnrealizedInvestmentGainsLossesRelatedToInsuranceLiabilityGainLossRecognition
Namespace Prefix:	bhny_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

This item presents the increase (decrease) in net unrealized investment gains (losses) related to unrealized investment gains (losses) during the period.

+ References

No definition available.

+ Details

Name:	bhny_ChangesInNetUnrealizedInvestmentGainsLossesRelatedToUnrealizedInvestmentGainsLossesDuringPeriod
Namespace Prefix:	bhny_
Data Type:	xbrli:monetaryItemType
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- Definition

This item represents the tax effects occurring during the period which are related to the net unrealized gain (loss) resulting from changes in the fair [carrying] value during the period of available-for-sale securities and from changes in certain insurance related assets and liabilities. Such tax affects would have been charged or credited directly to other comprehensive income or to related components of shareholders' equity.

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No definition available.

+ Details

Name:	bhny_IncomeTaxExpenseOnChangeInUnrealizedGainOrLoss
Namespace Prefix:	bhny_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

This item presents net unrealized investment gains (losses) attributable to the Company.

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No definition available.

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Name:	bhny_NetUnrealizedInvestmentGainsLossesIncludedInAccumulatedOtherComprehensiveIncomeLossAttributableToCompany
Namespace Prefix:	bhny_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

Name:	us-gaap_InvestmentsDebtAndEquitySecuritiesAbstract
Namespace Prefix:	us-gaap_
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BRIGHTHOUSE LIFE INSURANCE Co OF NY 10-Q