Leases (Notes)

12 Months Ended

Dec. 31, 2020

Lessee, Lease, Description [Line Items]

Lessee, Finance Leases [Text Block]

Leases

The following table summarizes the Company's leases recorded on the Consolidated Balance Sheet (in millions):

	As of
	December 31, 2020		December 31, 2019
Right-of-use assets:
Operating leases	$	517	$	525
Finance leases	501		504
Total right-of-use assets	$	1,018	$	1,029
Lease liabilities:
Operating leases	$	569	$	577
Finance leases	514		519
Total lease liabilities	$	1,083	$	1,096

The following table summarizes the Company's lease costs (in millions):

	Years Ended
	December 31, 2020			December 31, 2019
Variable	$	592		$	623
Operating	151			170
Finance:
Amortization	18			16
Interest	40			41
Short-term	20			7
Total lease costs	$	821		$	857
Weighted-average remaining lease term (years):
Operating leases	7.4			7.6
Finance leases	27.5			28.8
Weighted-average discount rate:
Operating leases	4.5		%	5.2		%
Finance leases	8.5		%	8.6		%

The following table summarizes the Company's supplemental cash flow information relating to leases (in millions):

	Years Ended
	December 31, 2020		December 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 leases	19		14

The Company has the following remaining lease commitments as of (in millions):

	December 31, 2020
	Operating		Finance		Total
2021	$	152	$	81	$	233
2022	125		74		199
2023	93		63		156
2024	66		63		129
2025	50		62		112
Thereafter	199		673		872
Total undiscounted lease payments	685		1,016		1,701
Less - amounts representing interest	(116)		(502)		(618)
Lease liabilities	$	569	$	514	$	1,083

Lessee, Operating Leases [Text Block]

Leases

The following table summarizes the Company's leases recorded on the Consolidated Balance Sheet (in millions):

	As of
	December 31, 2020		December 31, 2019
Right-of-use assets:
Operating leases	$	517	$	525
Finance leases	501		504
Total right-of-use assets	$	1,018	$	1,029
Lease liabilities:
Operating leases	$	569	$	577
Finance leases	514		519
Total lease liabilities	$	1,083	$	1,096

The following table summarizes the Company's lease costs (in millions):

	Years Ended
	December 31, 2020			December 31, 2019
Variable	$	592		$	623
Operating	151			170
Finance:
Amortization	18			16
Interest	40			41
Short-term	20			7
Total lease costs	$	821		$	857
Weighted-average remaining lease term (years):
Operating leases	7.4			7.6
Finance leases	27.5			28.8
Weighted-average discount rate:
Operating leases	4.5		%	5.2		%
Finance leases	8.5		%	8.6		%

The following table summarizes the Company's supplemental cash flow information relating to leases (in millions):

	Years Ended
	December 31, 2020		December 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 leases	19		14

The Company has the following remaining lease commitments as of (in millions):

	December 31, 2020
	Operating		Finance		Total
2021	$	152	$	81	$	233
2022	125		74		199
2023	93		63		156
2024	66		63		129
2025	50		62		112
Thereafter	199		673		872
Total undiscounted lease payments	685		1,016		1,701
Less - amounts representing interest	(116)		(502)		(618)
Lease liabilities	$	569	$	514	$	1,083

PacifiCorp [Member]

Lessee, Lease, Description [Line Items]

Lessee, Finance Leases [Text Block]

Leases

The following table summarizes PacifiCorp's leases recorded on the Consolidated Balance Sheets as of December 31 (in millions):

	2020		2019
Right-of-use assets:
Operating leases	$	11	$	12
Finance leases	17		19
Total right-of-use assets	$	28	$	31
Lease liabilities:
Operating leases	$	11	$	12
Finance leases	17		19
Total lease liabilities	$	28	$	31

The following table summarizes PacifiCorp's lease costs for the years ended December 31 (in millions):

	2020			2019
Variable	$	60		$	77
Operating	3			3
Finance:
Amortization	2			1
Interest	2			2
Short-term	1			2
Total lease costs	$	68		$	85
Weighted-average remaining lease term (years):
Operating leases	13.9			14.0
Finance leases	8.4			9.1
Weighted-average discount rate:
Operating leases	3.8		%	3.7		%
Finance leases	10.5		%	10.6		%

Cash payments associated with operating and finance lease liabilities approximated lease cost for the years ended December 31, 2020 and 2019.

PacifiCorp has the following remaining lease commitments as of (in millions):

	December 31, 2020
	Operating		Finance		Total
2021	$	3	$	7	$	10
2022	2		3		5
2023	2		2		4
2024	1		2		3
2025	1		2		3
Thereafter	6		12		18
Total undiscounted lease payments	15		28		43
Less - amounts representing interest	(4)		(11)		(15)
Lease liabilities	$	11	$	17	$	28

Lessee, Operating Leases [Text Block]

Leases

The following table summarizes PacifiCorp's leases recorded on the Consolidated Balance Sheets as of December 31 (in millions):

	2020		2019
Right-of-use assets:
Operating leases	$	11	$	12
Finance leases	17		19
Total right-of-use assets	$	28	$	31
Lease liabilities:
Operating leases	$	11	$	12
Finance leases	17		19
Total lease liabilities	$	28	$	31

The following table summarizes PacifiCorp's lease costs for the years ended December 31 (in millions):

	2020			2019
Variable	$	60		$	77
Operating	3			3
Finance:
Amortization	2			1
Interest	2			2
Short-term	1			2
Total lease costs	$	68		$	85
Weighted-average remaining lease term (years):
Operating leases	13.9			14.0
Finance leases	8.4			9.1
Weighted-average discount rate:
Operating leases	3.8		%	3.7		%
Finance leases	10.5		%	10.6		%

Cash payments associated with operating and finance lease liabilities approximated lease cost for the years ended December 31, 2020 and 2019.

PacifiCorp has the following remaining lease commitments as of (in millions):

	December 31, 2020
	Operating		Finance		Total
2021	$	3	$	7	$	10
2022	2		3		5
2023	2		2		4
2024	1		2		3
2025	1		2		3
Thereafter	6		12		18
Total undiscounted lease payments	15		28		43
Less - amounts representing interest	(4)		(11)		(15)
Lease liabilities	$	11	$	17	$	28

Nevada Power Company [Member]

Lessee, Lease, Description [Line Items]

Lessee, Finance Leases [Text Block]

Leases

The following table summarizes Nevada Power's leases recorded on the Consolidated Balance Sheet as of December 31 (in millions):

	2020		2019
Right-of-use assets:
Operating leases	$	12	$	13
Finance leases	351		441
Total right-of-use assets	$	363	$	454
Lease liabilities:
Operating leases	$	15	$	17
Finance leases	361		454
Total lease liabilities	$	376	$	471

The following table summarizes Nevada Power's lease costs for the years ended December 31 (in millions):

	2020			2019
Variable	$	434		$	434
Operating	3			3
Finance:
Amortization	12			13
Interest	29			37
Total lease costs	$	478		$	487
Weighted-average remaining lease term (years):
Operating leases	6.5			7.5
Finance leases	28.7			30.6
Weighted-average discount rate:
Operating leases	4.5		%	4.5		%
Finance leases	8.6		%	8.7		%

The following table summarizes Nevada Power's supplemental cash flow information relating to leases as of December 31 (in millions):

	2020		2019
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 leases	9		9

Nevada Power has the following remaining lease commitments as of (in millions):

	December 31, 2020
	Operating		Finance		Total
2021	$	3	$	56	$	59
2022	3		54		57
2023	2		43		45
2024	3		43		46
2025	3		43		46
Thereafter	4		491		495
Total undiscounted lease payments	18		730		748
Less - amounts representing interest	(3)		(369)		(372)
Lease liabilities	$	15	$	361	$	376

Operating and Finance Lease Obligations

Nevada Power's lease obligation primarily consists of a transmission line One Nevada Transmission Line ("ON Line"), which was placed in-service on December 31, 2013. Nevada Power and Sierra Pacific, collectively the ("Nevada Utilities"), entered into a long-term transmission use agreement, in which the Nevada Utilities have a 25% interest and Great Basin Transmission South, LLC has a 75% interest. The Nevada Utilities' share of the long-term transmission use agreement and ownership interest is split at 75% for Nevada Power and 25% for Sierra Pacific, previously split 95% for Nevada Power and 5% for Sierra Pacific. In December 2019, the PUCN ordered the Nevada Utilities to complete the necessary procedures to change the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. In August 2020, the FERC approved the amended agreement between the Nevada Utilities and Great Basin Transmission, LLC that reallocated the PUCN-approved ownership percentage change from Nevada Power to Sierra Pacific. The term of the lease is 41 years with the agreement ending December 31, 2054. Total ON Line finance lease obligations of $295 million and $385 million were included on the Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively. See Note 2 for further discussion of Nevada Power's other lease obligations.

Lessee, Operating Leases [Text Block]

Leases

The following table summarizes Nevada Power's leases recorded on the Consolidated Balance Sheet as of December 31 (in millions):

	2020		2019
Right-of-use assets:
Operating leases	$	12	$	13
Finance leases	351		441
Total right-of-use assets	$	363	$	454
Lease liabilities:
Operating leases	$	15	$	17
Finance leases	361		454
Total lease liabilities	$	376	$	471

The following table summarizes Nevada Power's lease costs for the years ended December 31 (in millions):

	2020			2019
Variable	$	434		$	434
Operating	3			3
Finance:
Amortization	12			13
Interest	29			37
Total lease costs	$	478		$	487
Weighted-average remaining lease term (years):
Operating leases	6.5			7.5
Finance leases	28.7			30.6
Weighted-average discount rate:
Operating leases	4.5		%	4.5		%
Finance leases	8.6		%	8.7		%

The following table summarizes Nevada Power's supplemental cash flow information relating to leases as of December 31 (in millions):

	2020		2019
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 leases	9		9

Nevada Power has the following remaining lease commitments as of (in millions):

	December 31, 2020
	Operating		Finance		Total
2021	$	3	$	56	$	59
2022	3		54		57
2023	2		43		45
2024	3		43		46
2025	3		43		46
Thereafter	4		491		495
Total undiscounted lease payments	18		730		748
Less - amounts representing interest	(3)		(369)		(372)
Lease liabilities	$	15	$	361	$	376

Operating and Finance Lease Obligations

Nevada Power's lease obligation primarily consists of a transmission line One Nevada Transmission Line ("ON Line"), which was placed in-service on December 31, 2013. Nevada Power and Sierra Pacific, collectively the ("Nevada Utilities"), entered into a long-term transmission use agreement, in which the Nevada Utilities have a 25% interest and Great Basin Transmission South, LLC has a 75% interest. The Nevada Utilities' share of the long-term transmission use agreement and ownership interest is split at 75% for Nevada Power and 25% for Sierra Pacific, previously split 95% for Nevada Power and 5% for Sierra Pacific. In December 2019, the PUCN ordered the Nevada Utilities to complete the necessary procedures to change the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. In August 2020, the FERC approved the amended agreement between the Nevada Utilities and Great Basin Transmission, LLC that reallocated the PUCN-approved ownership percentage change from Nevada Power to Sierra Pacific. The term of the lease is 41 years with the agreement ending December 31, 2054. Total ON Line finance lease obligations of $295 million and $385 million were included on the Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively. See Note 2 for further discussion of Nevada Power's other lease obligations.

Sierra Pacific Power Company [Member]

Lessee, Lease, Description [Line Items]

Lessee, Finance Leases [Text Block]

Leases

The following table summarizes Sierra Pacific's leases recorded on the Balance Sheet as of December 31 (in millions):

	2020		2019
Right-of-use assets:
Operating leases	$	16	$	17
Finance leases	126		43
Total right-of-use assets	$	142	$	60
Lease liabilities:
Operating leases	$	16	$	17
Finance leases	130		45
Total lease liabilities	$	146	$	62

The following table summarizes Sierra Pacific's lease costs for the years ended December 31 (in millions):

	2020			2019
Variable	$	78		$	69
Operating	2			1
Finance:
Amortization	4			2
Interest	9			2
Total lease costs	$	93		$	74
Weighted-average remaining lease term (years):
Operating leases	27.2			26.3
Finance leases	27.8			20.9
Weighted-average discount rate:
Operating leases	5.0		%	5.0		%
Finance leases	8.1		%	7.1		%

The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases as of December 31 (in millions):

	2020		2019
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

Sierra Pacific has the following remaining lease commitments as of (in millions):

	December 31, 2020
	Operating		Finance		Total
2021	$	2	$	17	$	19
2022	1		17		18
2023	1		17		18
2024	1		16		17
2025	1		16		17
Thereafter	25		170		195
Total undiscounted lease payments	31		253		284
Less - amounts representing interest	(15)		(123)		(138)
Lease liabilities	$	16	$	130	$	146

Operating and Finance Lease Obligations

Sierra Pacific's operating and finance lease obligations consist mainly of ON Line and Truckee-Carson Irrigation District ("TCID"). ON Line was placed in-service on December 31, 2013. Sierra Pacific and Nevada Power, collectively the ("Nevada Utilities"), entered into a long-term transmission use agreement, in which the Nevada Utilities have a 25% interest and Great Basin Transmission South, LLC has a 75% interest. The Nevada Utilities' share of the long-term transmission use agreement and ownership interest is split at 75% for Nevada Power and 25% for Sierra Pacific, previously split 95% for Nevada Power and 5% for Sierra Pacific. In December 2019, the PUCN ordered the Nevada Utilities to complete the necessary procedures to change the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. In August 2020, the FERC approved the amended agreement between the Nevada Utilities and Great Basin Transmission, LLC that reallocated the PUCN-approved ownership percentage change from Nevada Power to Sierra Pacific. The term of the lease is 41 years with the agreement ending December 31, 2054. In 1999, Sierra Pacific entered into a 50-year agreement with TCID to lease electric distribution facilities. Total finance lease obligations of $122 million and $35 million were included on the Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively, for these leases. See Note 2 for further discussion of Sierra Pacific's remaining lease obligations.

Lessee, Operating Leases [Text Block]

Leases

The following table summarizes Sierra Pacific's leases recorded on the Balance Sheet as of December 31 (in millions):

	2020		2019
Right-of-use assets:
Operating leases	$	16	$	17
Finance leases	126		43
Total right-of-use assets	$	142	$	60
Lease liabilities:
Operating leases	$	16	$	17
Finance leases	130		45
Total lease liabilities	$	146	$	62

The following table summarizes Sierra Pacific's lease costs for the years ended December 31 (in millions):

	2020			2019
Variable	$	78		$	69
Operating	2			1
Finance:
Amortization	4			2
Interest	9			2
Total lease costs	$	93		$	74
Weighted-average remaining lease term (years):
Operating leases	27.2			26.3
Finance leases	27.8			20.9
Weighted-average discount rate:
Operating leases	5.0		%	5.0		%
Finance leases	8.1		%	7.1		%

The following table summarizes Sierra Pacific's supplemental cash flow information relating to leases as of December 31 (in millions):

	2020		2019
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

Sierra Pacific has the following remaining lease commitments as of (in millions):

	December 31, 2020
	Operating		Finance		Total
2021	$	2	$	17	$	19
2022	1		17		18
2023	1		17		18
2024	1		16		17
2025	1		16		17
Thereafter	25		170		195
Total undiscounted lease payments	31		253		284
Less - amounts representing interest	(15)		(123)		(138)
Lease liabilities	$	16	$	130	$	146

Operating and Finance Lease Obligations

Sierra Pacific's operating and finance lease obligations consist mainly of ON Line and Truckee-Carson Irrigation District ("TCID"). ON Line was placed in-service on December 31, 2013. Sierra Pacific and Nevada Power, collectively the ("Nevada Utilities"), entered into a long-term transmission use agreement, in which the Nevada Utilities have a 25% interest and Great Basin Transmission South, LLC has a 75% interest. The Nevada Utilities' share of the long-term transmission use agreement and ownership interest is split at 75% for Nevada Power and 25% for Sierra Pacific, previously split 95% for Nevada Power and 5% for Sierra Pacific. In December 2019, the PUCN ordered the Nevada Utilities to complete the necessary procedures to change the ownership split to 75% for Nevada Power and 25% for Sierra Pacific, effective January 1, 2020. In August 2020, the FERC approved the amended agreement between the Nevada Utilities and Great Basin Transmission, LLC that reallocated the PUCN-approved ownership percentage change from Nevada Power to Sierra Pacific. The term of the lease is 41 years with the agreement ending December 31, 2054. In 1999, Sierra Pacific entered into a 50-year agreement with TCID to lease electric distribution facilities. Total finance lease obligations of $122 million and $35 million were included on the Consolidated Balance Sheets as of December 31, 2020 and 2019, respectively, for these leases. See Note 2 for further discussion of Sierra Pacific's remaining lease obligations.

Eastern Energy Gas Holdings, LLC [Member]

Lessee, Lease, Description [Line Items]

Lessee, Finance Leases [Text Block]

Leases

The following table summarizes Eastern Energy Gas' leases recorded on the Consolidated Balance Sheet (in millions):

	As of
	December 31, 2020		December 31, 2019
Right-of-use assets:
Operating leases	$	31	$	37
Finance leases	8		6
Total right-of-use assets	$	39	$	43
Lease liabilities:
Operating leases	$	29	$	35
Finance leases	6		6
Total lease liabilities	$	35	$	41

The following table summarizes Eastern Energy Gas' lease costs (in millions):

	Years Ended
	December 31, 2020			December 31, 2019
Operating	$	7		$	7
Short-term	5			7
Total lease costs	$	12		$	14
Weighted-average remaining lease term (years):
Operating leases	11.5			11.2
Finance leases	4.7			5.6
Weighted-average discount rate:
Operating leases	4.4		%	4.4		%
Finance leases	2.6		%	4.1		%

The following table summarizes Eastern Energy Gas' supplemental cash flow information relating to leases (in millions):

	Years Ended
	December 31, 2020		December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	12	$	14

Eastern Energy Gas has the following remaining lease commitments as of (in millions):

	December 31, 2020
	Operating		Finance		Total
2021	$	6	$	2	$	8
2022	5		2		7
2023	4		1		5
2024	2		1		3
2025	2		1		3
Thereafter	19		—		19
Total undiscounted lease payments	$	38	$	7	$	45
Less - amounts representing interest	(9)		(1)		(10)
Lease liabilities	$	29	$	6	$	35

Lessee, Operating Leases [Text Block]

Leases

The following table summarizes Eastern Energy Gas' leases recorded on the Consolidated Balance Sheet (in millions):

	As of
	December 31, 2020		December 31, 2019
Right-of-use assets:
Operating leases	$	31	$	37
Finance leases	8		6
Total right-of-use assets	$	39	$	43
Lease liabilities:
Operating leases	$	29	$	35
Finance leases	6		6
Total lease liabilities	$	35	$	41

The following table summarizes Eastern Energy Gas' lease costs (in millions):

	Years Ended
	December 31, 2020			December 31, 2019
Operating	$	7		$	7
Short-term	5			7
Total lease costs	$	12		$	14
Weighted-average remaining lease term (years):
Operating leases	11.5			11.2
Finance leases	4.7			5.6
Weighted-average discount rate:
Operating leases	4.4		%	4.4		%
Finance leases	2.6		%	4.1		%

The following table summarizes Eastern Energy Gas' supplemental cash flow information relating to leases (in millions):

	Years Ended
	December 31, 2020		December 31, 2019
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$	12	$	14

Eastern Energy Gas has the following remaining lease commitments as of (in millions):

	December 31, 2020
	Operating		Finance		Total
2021	$	6	$	2	$	8
2022	5		2		7
2023	4		1		5
2024	2		1		3
2025	2		1		3
Thereafter	19		—		19
Total undiscounted lease payments	$	38	$	7	$	45
Less - amounts representing interest	(9)		(1)		(10)
Lease liabilities	$	29	$	6	$	35