XML 215 R171.htm IDEA: XBRL DOCUMENT v3.20.4
Subsidiary Debt - SPPC - Long-Term Debt (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Debt Instrument [Line Items]    
Par value $ 49,759  
Long-term Debt 49,866 $ 39,353
Subsidiary Debt [Member]    
Debt Instrument [Line Items]    
Par value 36,108  
Sierra Pacific Power Company [Member]    
Debt Instrument [Line Items]    
Par value 1,167  
Long-term Debt 1,164 1,135
Long-term Debt, Excluding Current Maturities 1,164 $ 1,135
NV Energy [Member]    
Debt Instrument [Line Items]    
Par value 3,701  
NV Energy [Member] | Subsidiary Debt [Member]    
Debt Instrument [Line Items]    
Par value 3,701  
NV Energy [Member] | Sierra Pacific Power Company [Member]    
Debt Instrument [Line Items]    
Par value 1,167  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Mortgage securities, 3.375%, Series T due 2023 [Member]    
Debt Instrument [Line Items]    
Par value 250  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Mortgage securities, 2.600%, Series U due 2026 [Member]    
Debt Instrument [Line Items]    
Par value 400  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Mortgage securities, 6.750%, Series P due 2037 [Member]    
Debt Instrument [Line Items]    
Par value 252  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Pollution Control Refunding Revenue Bonds, 1.850%, Series 2016B, due 2029 [Member]    
Debt Instrument [Line Items]    
Par value [1] 30  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Gas and water facilities refunding revenue bonds, 3.000% series 2016B, due 2036 [Member]    
Debt Instrument [Line Items]    
Par value [2] 60  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]    
Debt Instrument [Line Items]    
Par value [3] 30  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]    
Debt Instrument [Line Items]    
Par value [1],[4] 25  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]    
Debt Instrument [Line Items]    
Par value [1],[4] 25  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Water facilities refunding revenue bonds, series 2016F, due 2036 [Member]    
Debt Instrument [Line Items]    
Par value [1] 75  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Water facilities refunding revenue bonds, series 2016G, due 2036 [Member]    
Debt Instrument [Line Items]    
Par value [1] $ 20  
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Mortgage securities, 3.375%, Series T due 2023 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.375% 3.375%
Par value $ 250  
Long-term Debt $ 249 $ 249
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Mortgage securities, 2.600%, Series U due 2026 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.60% 2.60%
Par value $ 400  
Long-term Debt $ 396 $ 396
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Mortgage securities, 6.750%, Series P due 2037 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 6.75% 6.75%
Par value $ 252  
Long-term Debt $ 255 $ 255
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Pollution Control Refunding Revenue Bonds, 1.850%, Series 2016B, due 2029 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 1.85% 1.85%
Par value $ 30  
Long-term Debt [1] $ 29 $ 29
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Gas and water facilities refunding revenue bonds, 3.000% series 2016B, due 2036 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 3.00% 3.00%
Par value $ 60  
Long-term Debt [2] $ 61 $ 62
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016C, due 2036 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 0.625%  
Par value $ 30  
Long-term Debt [3] $ 30 $ 0
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016D, due 2036 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.05% 2.05%
Par value $ 25  
Long-term Debt [1],[4] $ 25 $ 25
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016E, due 2036 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.05% 2.05%
Par value $ 25  
Long-term Debt [1],[4] $ 25 $ 25
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016F, due 2036 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 2.05% 2.05%
Par value $ 75  
Long-term Debt [1] $ 74 $ 74
NV Energy [Member] | Sierra Pacific Power Company [Member] | Subsidiary Debt [Member] | Water facilities refunding revenue bonds, series 2016G, due 2036 [Member]    
Debt Instrument [Line Items]    
Debt Instrument, Interest Rate, Stated Percentage 1.85% 1.85%
Par value $ 20  
Long-term Debt [1] $ 20 $ 20
[1] Subject to mandatory purchase by Sierra Pacific in April 2022 at which date the interest rate may be adjusted.
[2] Subject to mandatory purchase by Sierra Pacific in June 2022 at which date the interest rate may be adjusted.
[3] Bond was purchased by Sierra Pacific during 2019 and re-offered at a fixed rate in September 2020 for a two-year term subject to mandatory purchase by Sierra Pacific in April 2022.
[4] Bonds were purchased by Sierra Pacific during 2019 and re-offered at a fixed interest rate.