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Equity (Capital Transactions - Narrative) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2022 USD ($)
Equity [Abstract]
Capital Contributions To Subsidiaries	$ 100

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- Definition

Capital Contributions To Subsidiaries

+ References

No definition available.

+ Details

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Namespace Prefix:	bhl_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_EquityAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration