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Leases (Tables)
 12 Months Ended
Dec. 31, 2020
Lessee, Lease, Description [Line Items]  
Operating and Finance Lease, Balance Sheet Summary [Table Text Block]
The following table summarizes the Company's leases recorded on the Consolidated Balance Sheet (in millions):
As of
December 31, 2020December 31, 2019
Right-of-use assets:
Operating leases$517 $525 
Finance leases501 504 
Total right-of-use assets$1,018 $1,029 
Lease liabilities:
Operating leases$569 $577 
Finance leases514 519 
Total lease liabilities$1,083 $1,096 
Lease, Cost [Table Text Block]
The following table summarizes the Company's lease costs (in millions):
Years Ended
December 31, 2020December 31, 2019
Variable$592 $623 
Operating151 170 
Finance:
Amortization18 16 
Interest40 41 
Short-term20 7 
Total lease costs$821 $857 
Weighted-average remaining lease term (years):
Operating leases7.47.6
Finance leases27.528.8
Weighted-average discount rate:
Operating leases 4.5 %5.2 %
Finance leases8.5 %8.6 %
Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]
The following table summarizes the Company's supplemental cash flow information relating to leases (in millions):
Years Ended
December 31, 2020December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$(152)$(153)
Operating cash flows from finance leases(40)(42)
Financing cash flows from finance leases(24)(19)
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases$83 $82 
Finance leases19 14 
Operating and Finance Lease, Liability, Maturity [Table Text Block]
The Company has the following remaining lease commitments as of (in millions):
December 31, 2020
OperatingFinanceTotal
2021$152 $81 $233 
2022125 74 199 
202393 63 156 
202466 63 129 
202550 62 112 
Thereafter199 673 872 
Total undiscounted lease payments685 1,016 1,701 
Less - amounts representing interest(116)(502)(618)
Lease liabilities$569 $514 $1,083 
Sierra Pacific has the following remaining lease commitments as of (in millions):
December 31, 2020
OperatingFinanceTotal
2021$2 $17 $19 
20221 17 18 
20231 17 18 
20241 16 17 
20251 16 17 
Thereafter25 170 195 
Total undiscounted lease payments31 253 284 
Less - amounts representing interest(15)(123)(138)
Lease liabilities$16 $130 $146 
PacifiCorp [Member]  
Lessee, Lease, Description [Line Items]  
Operating and Finance Lease, Balance Sheet Summary [Table Text Block]
The following table summarizes PacifiCorp's leases recorded on the Consolidated Balance Sheets as of December 31 (in millions):
20202019
Right-of-use assets:
Operating leases$11 $12 
Finance leases17 19 
Total right-of-use assets$28 $31 
Lease liabilities:
Operating leases$11 $12 
Finance leases17 19 
Total lease liabilities$28 $31 
Lease, Cost [Table Text Block]
The following table summarizes PacifiCorp's lease costs for the years ended December 31 (in millions):
20202019
Variable$60 $77 
Operating3 3 
Finance:
Amortization2 1 
Interest2 2 
Short-term1 2 
Total lease costs$68 $85 
Weighted-average remaining lease term (years):
Operating leases13.914.0
Finance leases8.49.1
Weighted-average discount rate:
Operating leases 3.8 %3.7 %
Finance leases10.5 %10.6 %
Operating and Finance Lease, Liability, Maturity [Table Text Block]
PacifiCorp has the following remaining lease commitments as of (in millions):
December 31, 2020
OperatingFinanceTotal
2021$3 $7 $10 
20222 3 5 
20232 2 4 
20241 2 3 
20251 2 3 
Thereafter6 12 18 
Total undiscounted lease payments15 28 43 
Less - amounts representing interest(4)(11)(15)
Lease liabilities$11 $17 $28 
Nevada Power Company [Member]  
Lessee, Lease, Description [Line Items]  
Operating and Finance Lease, Balance Sheet Summary [Table Text Block]
The following table summarizes Nevada Power's leases recorded on the Consolidated Balance Sheet as of December 31 (in millions):
20202019
Right-of-use assets:
Operating leases$12 $13 
Finance leases351 441 
Total right-of-use assets$363 $454 
Lease liabilities:
Operating leases$15 $17 
Finance leases361 454 
Total lease liabilities$376 $471 
Lease, Cost [Table Text Block]
The following table summarizes Nevada Power's lease costs for the years ended December 31 (in millions):
20202019
Variable$434 $434 
Operating3 3 
Finance:
Amortization12 13 
Interest29 37 
Total lease costs$478 $487 
Weighted-average remaining lease term (years):
Operating leases6.57.5
Finance leases28.730.6
Weighted-average discount rate:
Operating leases 4.5 %4.5 %
Finance leases8.6 %8.7 %
Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]
The following table summarizes Nevada Power's supplemental cash flow information relating to leases as of December 31 (in millions):
20202019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$(3)$(3)
Operating cash flows from finance leases(34)(37)
Financing cash flows from finance leases(15)(14)
Right-of-use assets obtained in exchange for lease liabilities:
Operating leases$1 $— 
Finance leases9 9 
Operating and Finance Lease, Liability, Maturity [Table Text Block]
Nevada Power has the following remaining lease commitments as of (in millions):
December 31, 2020
OperatingFinanceTotal
2021$3 $56 $59 
20223 54 57 
20232 43 45 
20243 43 46 
20253 43 46 
Thereafter4 491 495 
Total undiscounted lease payments18 730 748 
Less - amounts representing interest(3)(369)(372)
Lease liabilities$15 $361 $376 
Sierra Pacific Power Company [Member]  
Lessee, Lease, Description [Line Items]  
Operating and Finance Lease, Balance Sheet Summary [Table Text Block]
The following table summarizes Sierra Pacific's leases recorded on the Balance Sheet as of December 31 (in millions):
20202019
Right-of-use assets:
Operating leases$16 $17 
Finance leases126 43 
Total right-of-use assets$142 $60 
Lease liabilities:
Operating leases$16 $17 
Finance leases130 45 
Total lease liabilities$146 $62 
Lease, Cost [Table Text Block]
The following table summarizes Sierra Pacific's lease costs for the years ended December 31 (in millions):
20202019
Variable$78 $69 
Operating2 1 
Finance:
Amortization4 2 
Interest9 2 
Total lease costs$93 $74 
Weighted-average remaining lease term (years):
Operating leases27.226.3
Finance leases27.820.9
Weighted-average discount rate:
Operating leases 5.0 %5.0 %
Finance leases8.1 %7.1 %
Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]
The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases as of December 31 (in millions):
20202019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$(2)$(3)
Operating cash flows from finance leases(6)(3)
Financing cash flows from finance leases(5)(3)
Right-of-use assets obtained in exchange for lease liabilities:
Finance leases$89 $5 
Eastern Energy Gas Holdings, LLC [Member]  
Lessee, Lease, Description [Line Items]  
Operating and Finance Lease, Balance Sheet Summary [Table Text Block]
The following table summarizes Eastern Energy Gas' leases recorded on the Consolidated Balance Sheet (in millions):

As of
December 31, 2020December 31, 2019
Right-of-use assets:
Operating leases$31 $37 
Finance leases8 6 
Total right-of-use assets$39 $43 
Lease liabilities:
Operating leases$29 $35 
Finance leases6 6 
Total lease liabilities$35 $41 
Lease, Cost [Table Text Block]
The following table summarizes Eastern Energy Gas' lease costs (in millions):

Years Ended
December 31, 2020December 31, 2019
Operating$7 $7 
Short-term5 7 
Total lease costs$12 $14 
Weighted-average remaining lease term (years):
Operating leases11.511.2
Finance leases4.75.6
Weighted-average discount rate:
Operating leases4.4 %4.4 %
Finance leases2.6 %4.1 %
Operating and Finance Lease, Supplemental Cash Flow [Table Text Block]
The following table summarizes Eastern Energy Gas' supplemental cash flow information relating to leases (in millions):

Years Ended
December 31, 2020December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases$12 $14 
Operating and Finance Lease, Liability, Maturity [Table Text Block]
Eastern Energy Gas has the following remaining lease commitments as of (in millions):

December 31, 2020
OperatingFinanceTotal
2021$6 $2 $8 
20225 2 7 
20234 1 5 
20242 1 3 
20252 1 3 
Thereafter19 — 19 
Total undiscounted lease payments$38 $7 $45 
Less - amounts representing interest(9)(1)(10)
Lease liabilities$29 $6 $35