Regulatory Matters (Tables)

12 Months Ended

Dec. 31, 2019

Schedule Of Regulatory Assets and Liabilities [Line Items]

Regulatory assets represent costs that are expected to be recovered in future regulated rates. The Company's regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions):



	Weighted
	Average
	Remaining Life	2019		2018

Employee benefit plans⁽¹⁾	15 years	$	667	$	773
Asset retirement obligations	Various	445		375
Asset disposition costs	Various	391		358
Deferred income taxes⁽²⁾	Various	223		196
Deferred operating costs	11 years	134		141
Deferred net power costs	2 years	110		103
Unrealized loss on regulated derivative contracts	3 years	78		120
Unamortized contract values	4 years	60		79
Abandoned projects	3 years	58		134
Other	Various	715		788
Total regulatory assets		$	2,881	$	3,067

Reflected as:
Current assets		$	115	$	171
Noncurrent assets		2,766		2,896
Total regulatory assets		$	2,881	$	3,067


(1)	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.


(2)	Amounts primarily represent income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.

Regulatory Liabilities [Table Text Block]

Regulatory liabilities represent income to be recognized or amounts to be returned to customers in future periods. The Company's regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions):



	Weighted
	Average
	Remaining Life	2019		2018

Deferred income taxes⁽¹⁾	Various	$	3,611	$	3,923
Cost of removal⁽²⁾	27 years	2,370		2,426
Levelized depreciation	29 years	304		329
Asset retirement obligations	33 years	241		163
Impact fees	2 years	72		88
Other	Various	713		577
Total regulatory liabilities		$	7,311	$	7,506

Reflected as:
Current liabilities		$	211	$	160
Noncurrent liabilities		7,100		7,346
Total regulatory liabilities		$	7,311	$	7,506

(1)

Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse. See Note 12 for further discussion of 2017 Tax Reform impacts.


(2)	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.

PacifiCorp [Member]

Schedule Of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets [Table Text Block]

Regulatory assets represent costs that are expected to be recovered in future rates. PacifiCorp's regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions):



	Weighted
	Average
	Remaining
	Life	2019		2018

Employee benefit plans⁽¹⁾	19 years	$	422	$	448
Utah mine disposition⁽²⁾	Various	125		136
Unamortized contract values	4 years	60		79
Deferred net power costs	2 years	106		62
Unrealized loss on derivative contracts	3 years	62		96
Asset retirement obligation	28 years	140		119
Other	Various	208		172
Total regulatory assets		$	1,123	$	1,112

Reflected as:
Current assets		$	63	$	36
Noncurrent assets		1,060		1,076
Total regulatory assets		$	1,123	$	1,112


(1)	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in rates when recognized.


(2)	Amounts represent regulatory assets established as a result of the Utah mine disposition in 2015 for the net property, plant and equipment not considered probable of disallowance and for the portion of losses associated with the assets held for sale, UMWA 1974 Pension Plan withdrawal and closure costs incurred to date considered probable of recove

Regulatory Liabilities [Table Text Block]

Regulatory Liabilities

Regulatory liabilities represent income to be recognized or amounts to be returned to customers in future periods. PacifiCorp's regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions):



	Weighted
	Average
	Remaining
	Life	2019		2018

Cost of removal⁽¹⁾	26 years	$	1,019	$	994
Deferred income taxes⁽²⁾	Various	1,653		1,803
Other	Various	297		258
Total regulatory liabilities		$	2,969	$	3,055

Reflected as:
Current liabilities		$	56	$	77
Noncurrent liabilities		2,913		2,978
Total regulatory liabilities		$	2,969	$	3,055


(1)	Amounts represent estimated costs, as accrued through depreciation rates, of removing property, plant and equipment in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.


(2)	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable of being passed on to customers, offset by income tax benefits related to certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.

MidAmerican Energy Company [Member]

Schedule Of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets [Table Text Block]

Regulatory assets represent costs that are expected to be recovered in future regulated rates. MidAmerican Energy's regulatory assets reflected on the Balance Sheets consist of the following as of December 31 (in millions):



	Average
	Remaining Life	2019		2018

Asset retirement obligations⁽¹⁾	6 years	$	223	$	160
Employee benefit plans⁽²⁾	12 years	26		62
Unrealized loss on regulated derivative contracts	1 year	7		19
Other	Various	33		32
Total		$	289	$	273


(1)	Amount predominantly relates to asset retirement obligations for fossil-fueled and wind-powered generating facilities. Refer to Note 11 for a discussion of asset retirement obligations.


(2)	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.

Regulatory Liabilities [Table Text Block]

latory liabilities represent income to be recognized or amounts to be returned to customers in future periods. MidAmerican Energy's regulatory liabilities reflected on the Balance Sheets consist of the following as of December 31 (in millions):



	Average
	Remaining Life	2019		2018

Cost of removal accrual⁽¹⁾	29 years	$	572	$	708
Deferred income taxes⁽²⁾	Various	478		626
Asset retirement obligations⁽³⁾	33 years	241		160
Employee benefit plans⁽⁴⁾	10 years	32		—
Pre-funded AFUDC on transmission MVPs⁽⁵⁾	53 years	35		36
Iowa electric revenue sharing accrual⁽⁶⁾	1 year	22		70
Other	Various	26		20
Total		$	1,406	$	1,620


(1)	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing utility plant in accordance with accepted regulatory practices. Amounts are deducted from rate base or otherwise accrue a carrying cost.

(2)

Amounts primarily represent income tax liabilities primarily related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to state accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.


(3)	Amount represents the excess of nuclear decommission trust assets over the related asset retirement obligation. Refer to Note 11 for a discussion of asset retirement obligations.


(4)	Represents amounts not yet recognized as a component of net periodic benefit cost that are to be returned to customers in future periods when recognized.


(5)	Represents AFUDC accrued on transmission MVPs that is deducted from rate base as a result of the inclusion of related construction work-in-progress in rate base.


(6)	Represents current-year accruals under a regulatory arrangement in Iowa in which equity returns exceeding specified thresholds reduce utility plant upon final determination.

Nevada Power Company [Member]

Schedule Of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets [Table Text Block]

Regulatory assets represent costs that are expected to be recovered in future rates. Nevada Power's regulatory assets reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions):



	Weighted
	Average
	Remaining Life	2019		2018

Decommissioning costs⁽²⁾	3 years	$	241	$	222
Deferred operating costs	9 years	136		152
Merger costs from 1999 merger	25 years	120		125
Employee benefit plans⁽¹⁾	8 years	87		105
Asset retirement obligations	6 years	67		68
Legacy meters	13 years	49		53
ON Line deferrals	34 years	45		46
Abandoned projects	1 year	12		46
Deferred energy costs	1 year	—		47
Other	Various	44		53
Total regulatory assets		$	801	$	917

Reflected as:
Current assets		$	1	$	39
Noncurrent assets		800		878
Total regulatory assets		$	801	$	917


(1)	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.


(2)	Amount includes regulatory assets with an indeterminate life of $104 million and $81 million as of December 31, 2019 and 2018, respectively.

Regulatory Liabilities [Table Text Block]

Regulatory liabilities represent amounts that are expected to be returned to customers in future periods. Nevada Power's regulatory liabilities reflected on the Consolidated Balance Sheets consist of the following as of December 31 (in millions):



	Weighted
	Average
	Remaining Life	2019		2018

Deferred income taxes⁽¹⁾	Various	$	681	$	677
Cost of removal⁽²⁾	33 years	332		320
Impact fees⁽³⁾	2 years	72		86
Other	Various	171		103
Total regulatory liabilities		$	1,256	$	1,186

Reflected as:
Current liabilities		$	93	$	49
Noncurrent liabilities		1,163		1,137
Total regulatory liabilities		$	1,256	$	1,186


(1)	Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to accelerated tax depreciation and certain property-related basis differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.


(2)	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices.


(3)	Amounts reduce rate base or otherwise accrue a carrying cost.

Sierra Pacific Power Company [Member]

Schedule Of Regulatory Assets and Liabilities [Line Items]

Regulatory Assets [Table Text Block]

Regulatory assets represent costs that are expected to be recovered in future rates. Sierra Pacific's regulatory assets reflected on the Balance Sheets consist of the following as of December 31 (in millions):



	Weighted
	Average
	Remaining Life	2019		2018

Employee benefit plans⁽¹⁾	8 years	$	107	$	132
Merger costs from 1999 merger	27 years	71		74
Abandoned projects	7 years	24		29
Deferred Operating Costs	12 years	23		15
Losses on reacquired debt	15 years	17		19
Other	Various	53		52
Total regulatory assets		$	295	$	321

Reflected as:
Current assets		$	12	$	7
Noncurrent assets		283		314
Total regulatory assets		$	295	$	321


(1)	Represents amounts not yet recognized as a component of net periodic benefit cost that are expected to be included in regulated rates when recognized.

Regulatory Liabilities [Table Text Block]

Regulatory liabilities represent amounts that are expected to be returned to customers in future periods. Sierra Pacific's regulatory liabilities reflected on the Balance Sheets consist of the following as of December 31 (in millions):



	Weighted
	Average
	Remaining Life	2019		2018

Deferred income taxes⁽¹⁾	Various	$	263	$	270
Cost of removal⁽²⁾	38 years	217		210
Other	Various	58		29
Total regulatory liabilities		$	538	$	509

Reflected as:
Current liabilities		$	49	$	18
Noncurrent liabilities		489		491
Total regulatory liabilities		$	538	$	509

(1)

Amounts primarily represent income tax liabilities related to the federal tax rate change from 35% to 21% that are probable to be passed on to customers, offset by income tax benefits related to accelerated tax depreciation and certain property-related basis differences and other various differences that were previously passed on to customers and will be included in regulated rates when the temporary differences reverse.


(2)	Amounts represent estimated costs, as accrued through depreciation rates and exclusive of ARO liabilities, of removing regulated property, plant and equipment in accordance with accepted regulatory practices.