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Recent Financing Transactions	3 Months Ended
Recent Financing Transactions	Mar. 31, 2016
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions Long-Term Debt In April 2016, Sierra Pacific issued $400 million of its 2.60% General and Refunding Securities, Series U, due May 2026. The net proceeds will be used, together with cash on hand, to pay at maturity the $450 million principal amount of 6.00% General and Refunding Securities, Series M, maturing in May 2016. In March 2016, BHE repaid at par value $500 million, plus accrued interest, of its junior subordinated debentures due December 2043. Credit Facilities In March 2016, Solar Star Funding, LLC amended its $320 million letter of credit facility reducing the amount available to $301 million and extending the maturity date to March 2026. As of March 31, 2016, Solar Star Funding, LLC had $284 million of letters of credit issued under this facility.
Sierra Pacific Power Company [Member]
Debt Instrument [Line Items]
Recent Financing Transactions	Recent Financing Transactions In April 2016, Sierra Pacific issued $400 million of its 2.60% General and Refunding Securities, Series U, due May 2026. The net proceeds will be used, together with cash on hand, to pay at maturity the $450 million principal amount of 6.00% General and Refunding Securities, Series M, maturing in May 2016. In April 2016, Sierra Pacific repurchased at par value $58 million, plus accrued interest, of its Pollution Control Revenue Bonds Series 2006A, due 2031, and $75 million, plus accrued interest, of its Pollution Control Revenue Bonds Series 2006B, due 2036.