LONG-TERM DEBT - Additional information (Details) - BHE Seller notes $ in Millions	Dec. 31, 2020 USD ($)
Long-term Debt and Capital Lease Obligations, Including Current Maturities [Abstract]
2021	$ 45.6
2022	43.7
2023	42.8
2024	495.4
2025	15.2
Thereafter	5.7
Total	648.4
Equipment and real estate term loans
Long-term Debt and Capital Lease Obligations, Including Current Maturities [Abstract]
2021	40.6
2022	38.7
2023	37.8
2024	26.9
2025	15.2
Thereafter	5.7
Total	164.9
Term loan facility
Long-term Debt and Capital Lease Obligations, Including Current Maturities [Abstract]
2021	5.0
2022	5.0
2023	5.0
2024	468.5
Total	$ 483.5

Amount, after unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 4
-Subparagraph (b)(3)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16))
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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the next rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing after the fifth rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of long-term debt payable, sinking fund requirements, and other securities issued that are redeemable by holder at fixed or determinable prices and dates maturing in the second rolling twelve months following the latest balance sheet. For interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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