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Subsidiary Debt - BHE Renewables (Details) - USD ($)
$ in Millions
Dec. 31, 2015
Dec. 31, 2014
Debt Instrument [Line Items]    
Par value $ 38,133  
Subsidiary Debt [Member]    
Debt Instrument [Line Items]    
Par value 27,314  
Other long-term debt 27,214 $ 26,848
BHE Renewables [Member] | Subsidiary Debt [Member]    
Debt Instrument [Line Items]    
Par value 3,394  
Other long-term debt 3,356 2,934
BHE Renewables [Member] | Subsidiary Debt [Member] | CE Generation Bonds 7.416% due 2018 [Member]    
Debt Instrument [Line Items]    
Par value [1] 96  
Other long-term debt [1] $ 97 $ 125
Debt Instrument, Interest Rate, Stated Percentage 7.416% 7.416%
BHE Renewables [Member] | Subsidiary Debt [Member] | Salton Sea Funding Corporation Bonds 7.475% due 2018 [Member]    
Debt Instrument [Line Items]    
Par value [1] $ 50  
Other long-term debt [1] $ 51 $ 71
Debt Instrument, Interest Rate, Stated Percentage 7.475% 7.475%
BHE Renewables [Member] | Subsidiary Debt [Member] | Cordova Funding Corporation Bonds, 8.48% to 9.07%, due 2019 [Member]    
Debt Instrument [Line Items]    
Par value [1] $ 112  
Other long-term debt [1] $ 113 $ 125
BHE Renewables [Member] | Subsidiary Debt [Member] | Cordova Funding Corporation Bonds, 8.48% to 9.07%, due 2019 [Member] | Minimum [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 8.48% 8.48%
BHE Renewables [Member] | Subsidiary Debt [Member] | Cordova Funding Corporation Bonds, 8.48% to 9.07%, due 2019 [Member] | Maximum [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 9.07% 9.07%
BHE Renewables [Member] | Subsidiary Debt [Member] | Bishop Hill Holdings Senior Notes, 5.125%, due 2032 [Member]    
Debt Instrument [Line Items]    
Par value [1] $ 104  
Other long-term debt [1] $ 102 $ 107
Debt Instrument, Interest Rate, Stated Percentage 5.125% 5.125%
BHE Renewables [Member] | Subsidiary Debt [Member] | Solar Star Funding LLC Series B Senior Secured Notes 3.95% due June 2016 through June 2035 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.95% 0.00%
BHE Renewables [Member] | Subsidiary Debt [Member] | Solar Star Funding, LLC Series A Senior Secured Notes, 3.950%, due June 2035 [Member]    
Debt Instrument [Line Items]    
Par value [1] $ 325  
Other long-term debt [1] 321 $ 0
BHE Renewables [Member] | Subsidiary Debt [Member] | Solar Star Funding, LLC Series A Senior Secured Notes, 5.375%, due June 2016 through June 2035 [Member]    
Debt Instrument [Line Items]    
Par value [1] 1,000  
Other long-term debt [1] $ 988 $ 987
Debt Instrument, Interest Rate, Stated Percentage 5.375% 5.375%
BHE Renewables [Member] | Subsidiary Debt [Member] | Topaz Solar Farms Senior Notes, 5.75%, due 2039 [Member]    
Debt Instrument [Line Items]    
Par value [1] $ 826  
Other long-term debt [1] $ 815 $ 838
Debt Instrument, Interest Rate, Stated Percentage 5.75% 5.75%
BHE Renewables [Member] | Subsidiary Debt [Member] | Topaz Solar Farms Senior Notes, 4.875%, due 2039    
Debt Instrument [Line Items]    
Par value [1] $ 242  
Other long-term debt [1] $ 239 $ 247
Debt Instrument, Interest Rate, Stated Percentage 4.875% 4.875%
BHE Renewables [Member] | Subsidiary Debt [Member] | Other debt obligations [Member]    
Debt Instrument [Line Items]    
Par value [1] $ 25  
Other long-term debt [1] 25 $ 27
BHE Renewables [Member] | Subsidiary Debt [Member] | Pinyon Pines I and II Term Loans, due 2019 [Member]    
Debt Instrument [Line Items]    
Par value [1],[2] 380  
Other long-term debt [1],[2] $ 378 $ 398
Variable interest rate 2.23% 1.88%
Derivative, interest rate swap, portion of debt fixed 75.00%  
Interest rate swaps average fixed rate   3.55%
BHE Renewables [Member] | Subsidiary Debt [Member] | Wailuku Special Purpose Revenue Bonds, 0.09% due 2021 [Member]    
Debt Instrument [Line Items]    
Par value [1] $ 8  
Other long-term debt [1] $ 8 $ 9
Debt Instrument, Interest Rate, Stated Percentage 0.09% 0.00%
BHE Renewables [Member] | Subsidiary Debt [Member] | TX Jumbo Road Term Loan, 3.626% due 2025 [Member]    
Debt Instrument [Line Items]    
Par value [1] $ 226  
Other long-term debt [1] $ 219 $ 0
Debt Instrument, Interest Rate, Stated Percentage 3.626% 0.00%
[1] Amortizes quarterly or semiannually.
[2] The term loans have variable interest rates based on LIBOR plus a spread that varies during the term of the agreement. The weighted average variable interest rate as of December 31, 2015 and 2014 was 2.23% and 1.88%, respectively. The Company has entered into interest rate swaps that fix the interest rate on 75% of the outstanding debt. The weighted average fixed interest rate for the 75% portion is fixed at 3.55% as of December 31, 2015 and 2014.