Accounts Receivable Sale Programs (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended
Feb. 03, 2023	Mar. 31, 2025	Mar. 31, 2024
Receivables [Abstract]
Maximum amount of trade accounts receivable sales permitted	$ 200.0	$ 200.0
Trade accounts receivable sold		185.0	$ 135.1
Amount received from trade accounts receivable sold to third party		$ 183.8	$ 134.1

Amount received upon sale of trade accounts receivable to third party.

No definition available.

Name:	bhe_AmountReceivedFromTradeAccountsReceivableSoldToThirdParty
Namespace Prefix:	bhe_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration