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Accounts Receivable Sale Program (Narrative) (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Feb. 03, 2023 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Receivables [Abstract] |  |  |  |
Maximum amount of trade accounts receivable sales permitted | $ 200.0 | $ 200.0 |  |
Trade accounts receivable sold |  | 565.4 | $ 445.4 | $ 394.6
Amount Received From Trade Accounts Receivable Sold To Third Party |  | $ 560.9 | $ 443.6 | $ 394.0

X
- Definition Amount received upon sale of trade accounts receivable to third party. + References No definition available. + Details
Name: | bhe_AmountReceivedFromTradeAccountsReceivableSoldToThirdParty
Namespace Prefix: | bhe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Maximum permitted amount of accounts receivable sale. + References No definition available. + Details
Name: | bhe_MaximumAmountOfTradeAccountsReceivableSalesPermitted
Namespace Prefix: | bhe_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount decrease in trade accounts receivable that have been sold to a third party. + References No definition available. + Details
Name: | bhe_TradeAccountsReceivablesSold
Namespace Prefix: | bhe_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ReceivablesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration