Income Taxes (Tables)

12 Months Ended

Dec. 31, 2019

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Components of Income Tax Expense (Benefit) [Table Text Block]

Income tax (benefit) expense consists of the following for the years ended December 31 (in millions):

	2019			2018			2017
Current:
Federal	$	(956	)	$	(686	)	$	(653	)
State	(13		)	(9		)	(3		)
Foreign	81			104			83
	(888		)	(591		)	(573		)
Deferred:
Federal	431			165			(76		)
State	(127		)	(131		)	100
Foreign	(8		)	(20		)	2
	296			14			26
Investment tax credits	(6		)	(6		)	(7		)
Total	$	(598	)	$	(583	)	$	(554	)

Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax (benefit) expense is as follows for the years ended December 31:

	2019		2018		2017
Federal statutory income tax rate	21	%	21	%	35	%
Income tax credits	(32	)	(30	)	(20	)
Effects of ratemaking	(6	)	(8	)	(1	)
State income tax, net of federal income tax benefit	(5	)	(6	)	3
Effects of tax rate change and repatriation tax	—		(4	)	(31	)
Income tax effect of foreign income	(2	)	(3	)	(5	)
Equity income	—		1		(2	)
Other, net	(1	)	(1	)	(1	)
Effective income tax rate	(25	)%	(30	)%	(22	)%

Components of Net Deferred Income Tax Liability [Table Text Block]

The net deferred income tax liability consists of the following as of December 31 (in millions):

	2019			2018
Deferred income tax assets:
Regulatory liabilities	$	1,610		$	1,674
Federal, state and foreign carryforwards	575			596
AROs	306			232
Other	590			527
Total deferred income tax assets	3,081			3,029
Valuation allowances	(143		)	(137		)
Total deferred income tax assets, net	2,938			2,892
Deferred income tax liabilities:
Property-related items	(10,439		)	(10,185		)
Investments	(1,137		)	(876		)
Regulatory assets	(631		)	(656		)
Other	(384		)	(222		)
Total deferred income tax liabilities	(12,591		)	(11,939		)
Net deferred income tax liability	$	(9,653	)	$	(9,047	)

Summary of Operating Loss Carryforwards [Table Text Block]

The following table provides the Company's net operating loss and tax credit carryforwards and expiration dates as of December 31, 2019 (in millions):

	Federal		State		Foreign		Total
Net operating loss carryforwards(1)	$	292	$	5,819	$	523	$	6,634
Deferred income taxes on net operating loss carryforwards	61		323		141		525
Expiration dates	2020 - indefinite		2020 - 2039		2035 - 2038
Tax credits	$	23	$	27	$	—	$	50
Expiration dates	2023 - indefinite		2020 - indefinite

(1) The federal net operating loss carryforwards relate principally to net operating loss carryforwards of subsidiaries that are tax residents in both the United States and the United Kingdom. The federal net operating loss carryforwards were generated prior to Berkshire Hathaway Inc.'s ownership and will begin to expire in 2020.

Net Unrecognized Tax Benefits Roll Forward [Table Text Block]

A reconciliation of the beginning and ending balances of the Company's net unrecognized tax benefits is as follows for the years ended December 31 (in millions):

	2019			2018
Beginning balance	$	185		$	181
Additions based on tax positions related to the current year	3			4
Additions for tax positions of prior years	13			38
Reductions for tax positions of prior years	(37		)	(38		)
Statute of limitations	(9		)	2
Settlements	(5		)	(2		)
Interest and penalties	(5		)	—
Ending balance	$	145		$	185

PacifiCorp [Member]

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Components of Income Tax Expense (Benefit) [Table Text Block]

Income tax expense (benefit) consists of the following for the years ended December 31 (in millions):

	2019			2018			2017
Current:
Federal	$	158		$	164		$	249
State	34			40			41
Total	192			204			290
Deferred:
Federal	(132		)	(187		)	59
State	4			(9		)	15
Total	(128		)	(196		)	74
Investment tax credits	(3		)	(3		)	(4		)
Total income tax expense	$	61		$	5		$	360

Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense is as follows for the years ended December 31:

	2019		2018		2017
Federal statutory income tax rate	21	%	21	%	35	%
State income taxes, net of federal income tax benefit	3		4		3
Amortization of excess deferred income taxes	(11	)	(17	)	—
Effects of ratemaking	(2	)	—		1
Federal income tax credits	(3	)	(7	)	(5	)
Other	(1	)	—		(2	)
Effective income tax rate	7	%	1	%	32	%

Components of Net Deferred Income Tax Liability [Table Text Block]

The net deferred income tax liability consists of the following as of December 31 (in millions):

	2019			2018
Deferred income tax assets:
Regulatory liabilities	$	731		$	752
Employee benefits	83			91
Derivative contracts and unamortized contract values	33			45
State carryforwards	70			77
Asset retirement obligations	61			53
Other	68			56
	1,046			1,074
Deferred income tax liabilities:
Property, plant and equipment	(3,312		)	(3,335		)
Regulatory assets	(276		)	(273		)
Other	(21		)	(9		)
	(3,609		)	(3,617		)
Net deferred income tax liability	$	(2,563	)	$	(2,543	)

Summary of Operating Loss Carryforwards [Table Text Block]

The following table provides PacifiCorp's net operating loss and tax credit carryforwards and expiration dates as of December 31, 2019 (in millions):

	State
Net operating loss carryforwards	$	1,140
Deferred income taxes on net operating loss carryforwards	$	51
Expiration dates	2023 - 2032
Tax credit carryforwards	$	19
Expiration dates	2020 - indefinite

MidAmerican Energy Company [Member]

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Components of Income Tax Expense (Benefit) [Table Text Block]

MidAmerican Energy's income tax benefit from continuing operations consists of the following for the years ended December 31 (in millions):

	2019			2018			2017
Current:
Federal	$	(478	)	$	(276	)	$	(490	)
State	(47		)	(12		)	(25		)
	(525		)	(288		)	(515		)
Deferred:
Federal	166			42			335
State	(11		)	(8		)	(2		)
	155			34			333
Investment tax credits	(1		)	(1		)	(1		)
Total	$	(371	)	$	(255	)	$	(183	)

Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the federal statutory income tax rate to MidAmerican Energy's effective income tax rate applicable to income before income tax benefit from continuing operations is as follows for the years ended December 31:

	2019		2018		2017
Federal statutory income tax rate	21	%	21	%	35	%
Income tax credits	(90	)	(73	)	(68	)
State income tax, net of federal income tax benefit	(11	)	(4	)	(4	)
Effects of ratemaking	(8	)	(5	)	(7	)
Other, net	—		1		1
Effective income tax rate	(88	)%	(60	)%	(43	)%

Components of Net Deferred Income Tax Liability [Table Text Block]

MidAmerican Energy's net deferred income tax liability consists of the following as of December 31 (in millions):

	2019			2018
Deferred income tax assets:
Regulatory liabilities	$	368		$	405
Asset retirement obligations	234			164
Employee benefits	26			47
Other	71			80
Total deferred income tax assets	699			696
Deferred income tax liabilities:
Depreciable property	(3,253		)	(2,945		)
Regulatory assets	(68		)	(61		)
Other	(4		)	(12		)
Total deferred income tax liabilities	(3,325		)	(3,018		)
Net deferred income tax liability	$	(2,626	)	$	(2,322	)

Net Unrecognized Tax Benefits Roll Forward [Table Text Block]

A reconciliation of the beginning and ending balances of MidAmerican Energy's net unrecognized tax benefits is as follows for the years ended December 31 (in millions):

	2019			2018
Beginning balance	$	10		$	12
Additions based on tax positions related to the current year	5			4
Additions for tax positions of prior years	10			47
Reductions based on tax positions related to the current year	(5		)	(4		)
Reductions for tax positions of prior years	(12		)	(48		)
Interest and penalties	—			(1		)
Ending balance	$	8		$	10

MidAmerican Funding, LLC and Subsidiaries [Domain]

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Components of Income Tax Expense (Benefit) [Table Text Block]

MidAmerican Funding's income tax benefit from continuing operations consists of the following for the years ended December 31 (in millions):

	2019			2018			2017
Current:
Federal	$	(480	)	$	(280	)	$	(505	)
State	(49		)	(14		)	(31		)
	(529		)	(294		)	(536		)
Deferred:
Federal	164			42			338
State	(11		)	(9		)	(3		)
	153			33			335
Investment tax credits	(1		)	(1		)	(1		)
Total	$	(377	)	$	(262	)	$	(202	)

Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the federal statutory income tax rate to MidAmerican Funding's effective income tax rate applicable to income before income tax benefit from continuing operations is as follows for the years ended December 31:

	2019		2018		2017
Federal statutory income tax rate	21	%	21	%	35	%
Income tax credits	(94	)	(76	)	(77	)
State income tax, net of federal income tax benefit	(12	)	(4	)	(6	)
Effects of ratemaking	(8	)	(6	)	(8	)
Other, net	—		1		2
Effective income tax rate	(93	)%	(64	)%	(54	)%

Components of Net Deferred Income Tax Liability [Table Text Block]

MidAmerican Funding's net deferred income tax liability consists of the following as of December 31 (in millions):

	2019			2018
Deferred income tax assets:
Regulatory liabilities	$	368		$	405
Asset retirement obligations	234			164
Employee benefits	26			47
Other	76			85
Total deferred income tax assets	704			701
Deferred income tax liabilities:
Depreciable property	(3,253		)	(2,947		)
Regulatory assets	(68		)	(62		)
Other	(4		)	(11		)
Total deferred income tax liabilities	(3,325		)	(3,020		)
Net deferred income tax liability	$	(2,621	)	$	(2,319	)

Net Unrecognized Tax Benefits Roll Forward [Table Text Block]

A reconciliation of the beginning and ending balances of MidAmerican Funding's net unrecognized tax benefits is as follows for the years ended December 31 (in millions):

	2019			2018
Beginning balance	$	10		$	12
Additions based on tax positions related to the current year	5			4
Additions for tax positions of prior years	10			47
Reductions based on tax positions related to the current year	(5		)	(4		)
Reductions for tax positions of prior years	(12		)	(48		)
Interest and penalties	—			(1		)
Ending balance	$	8		$	10

Nevada Power Company [Member]

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Components of Income Tax Expense (Benefit) [Table Text Block]

Income tax expense (benefit) consists of the following for the years ended December 31 (in millions):

	2019			2018			2017
Current – Federal	$	105		$	84		$	62
Deferred – Federal	(31		)	(13		)	95
Uncertain tax positions	—			2			—
Investment tax credits	(1		)	(1		)	(1		)
Total income tax expense	$	73		$	72		$	156

Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the federal statutory income tax rate to the effective income tax rate applicable to income before income tax expense is as follows for the years ended December 31:

	2019		2018		2017
Federal statutory income tax rate	21	%	21	%	35	%
Non-deductible expenses	—		3		—
Effect of ratemaking	—		—		1
Effect of tax rate change	—		—		1
Other	1		—		1
Effective income tax rate	22	%	24	%	38	%

Components of Net Deferred Income Tax Liability [Table Text Block]

The net deferred income tax liability consists of the following as of December 31 (in millions):

	2019			2018
Deferred income tax assets:
Regulatory liabilities	$	211		$	209
Operating and finance leases	99			97
Employee benefits	14			15
Customer advances	19			18
Other	9			9
Total deferred income tax assets	352			348
Deferred income tax liabilities:
Property related items	(797		)	(799		)
Regulatory assets	(166		)	(196		)
Operating and finance leases	(95		)	(94		)
Other	(8		)	(8		)
Total deferred income tax liabilities	(1,066		)	(1,097		)
Net deferred income tax liability	$	(714	)	$	(749	)

Sierra Pacific Power Company [Member]

Schedule of Effective Income Tax Rate Reconciliation [Line Items]

Components of Income Tax Expense (Benefit) [Table Text Block]

Income tax expense (benefit) consists of the following for the years ended December 31 (in millions):

	2019			2018			2017
Current – Federal	$	19		$	23		$	—
Deferred – Federal	10			7			56
Uncertain tax positions	—			1			—
Investment tax credits	(1		)	(1		)	(1		)
Total income tax expense	$	28		$	30		$	55

Effective Income Tax Rate Reconciliation [Table Text Block]

A reconciliation of the federal statutory income rate to the effective income tax rate applicable to income before income tax expense is as follows for the years ended December 31:

	2019		2018		2017
Federal statutory income tax rate	21	%	21	%	35	%
Non-deductible expenses	—		4		—
Effect of tax rate change	—		—		(1	)
Effective income tax rate	21	%	25	%	34	%

Components of Net Deferred Income Tax Liability [Table Text Block]

The net deferred income tax liability consists of the following as of December 31 (in millions):

	2019			2018
Deferred income tax assets:
Regulatory liabilities	$	70		$	70
Employee benefit plans	6			10
Operating and finance leases	13			8
Customer Advances	9			8
Other	6			6
Total deferred income tax assets	104			102
Deferred income tax liabilities:
Property related items	(370		)	(346		)
Regulatory assets	(62		)	(73		)
Operating and finance leases	(13		)	(8		)
Other	(6		)	(6		)
Total deferred income tax liabilities	(451		)	(433		)
Net deferred income tax liability	$	(347	)	$	(331	)