Commitments and Contingencies (Tables)

12 Months Ended

Dec. 31, 2017

Contractual Obligation [Line Items]

Contractual Obligation, Fiscal Year Maturity Schedule

The Company has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2017 are as follows (in millions):

											2023 and
	2018		2019		2020		2021		2022		Thereafter		Total
Contract type:
Fuel, capacity and transmission contract commitments	$	2,098	$	1,637	$	1,435	$	1,210	$	1,055	$	10,044	$	17,479
Construction commitments	1,120		57		5		—		—		—		1,182
Operating leases and easements	180		157		141		121		111		1,297		2,007
Maintenance, service and other contracts	246		249		238		231		253		1,055		2,272
	$	3,644	$	2,100	$	1,819	$	1,562	$	1,419	$	12,396	$	22,940

PacifiCorp [Member]

Contractual Obligation [Line Items]

Contractual Obligation, Fiscal Year Maturity Schedule

PacifiCorp has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2017 are as follows (in millions):

	2018		2019		2020		2021		2022		2023 and Thereafter		Total
Contract type:
Purchased electricity contracts -
commercially operable	$	276	$	165	$	161	$	150	$	145	$	1,574	$	2,471
Purchased electricity contracts -
non-commercially operable	9		18		26		26		27		451		557
Fuel contracts	695		619		591		453		337		1,268		3,963
Construction commitments	85		29		3		—		—		—		117
Transmission	112		96		66		49		39		428		790
Operating leases and easements	7		7		7		7		6		97		131
Maintenance, service and
other contracts	36		34		22		25		14		80		211
Total commitments	$	1,220	$	968	$	876	$	710	$	568	$	3,898	$	8,240

MidAmerican Energy Company [Member]

Contractual Obligation [Line Items]

Contractual Obligation, Fiscal Year Maturity Schedule

MidAmerican Energy had the following firm commitments that are not reflected on the Balance Sheet. Minimum payments as of December 31, 2017, are as follows (in millions):

											2023 and
	2018		2019		2020		2021		2022		Thereafter		Total
Contract type:
Coal and natural gas for generation	$	112	$	56	$	12	$	9	$	8	$	—	$	197
Electric capacity and transmission	34		31		31		27		16		43		182
Natural gas contracts for gas operations	122		75		73		57		42		42		411
Construction commitments	790		28		2		—		—		—		820
Easements and operating leases	22		21		21		21		21		713		819
Maintenance and services contracts	96		102		119		114		154		233		818
	$	1,176	$	313	$	258	$	228	$	241	$	1,031	$	3,247

Nevada Power Company [Member]

Contractual Obligation [Line Items]

Contractual Obligation, Fiscal Year Maturity Schedule

Nevada Power has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2017 are as follows (in millions):

	2018		2019		2020		2021		2022		2023 and Thereafter		Total
Contract type:
Fuel, capacity and transmission contract commitments	$	591	$	450	$	377	$	378	$	380	$	5,208	$	7,384
Fuel and capacity contract commitments (not commercially operable)	—		15		22		24		25		421		507
Operating leases and easements	7		7		8		8		7		54		91
Maintenance, service and other contracts	46		44		43		39		37		40		249
Total commitments	$	644	$	516	$	450	$	449	$	449	$	5,723	$	8,231

Sierra Pacific Power Company [Member]

Contractual Obligation [Line Items]

Contractual Obligation, Fiscal Year Maturity Schedule

Sierra Pacific has the following firm commitments that are not reflected on the Consolidated Balance Sheet. Minimum payments as of December 31, 2017 are as follows (in millions):

											2023 and
	2018		2019		2020		2021		2022		Thereafter		Total
Contract type:
Fuel, capacity and transmission contract commitments	$	200	$	155	$	114	$	74	$	71	$	515	$	1,129
Fuel and capacity contract commitments (not commercially operable)	—		7		17		22		22		590		658
Operating leases and easements	4		4		4		3		2		54		71
Maintenance, service and other contracts	6		6		6		7		5		12		42
Total commitments	$	210	$	172	$	141	$	106	$	100	$	1,171	$	1,900