Asset Retirement Oblilgations (Tables)

12 Months Ended

Dec. 31, 2019

Asset Retirement Obligations Disclosure [Line Items]

Asset Retirement Obligations By Type [Table Text Block]

The following table presents the Company's ARO liabilities by asset type as of December 31 (in millions):

	2019		2018
Fossil fuel facilities	$	623	$	371
Quad Cities Station	358		345
Wind generating facilities	211		174
Offshore pipeline facilities	15		33
Solar generating facilities	21		20
Other	44		42
Total asset retirement obligations	$	1,272	$	985
Quad Cities Station nuclear decommissioning trust funds	$	599	$	504

Asset Retirement Obligation Disclosure [Table Text Block]

The following table reconciles the beginning and ending balances of the Company's ARO liabilities for the years ended December 31 (in millions):

	2019			2018
Beginning balance	$	985		$	954
Change in estimated costs	257			10
Additions	43			28
Retirements	(61		)	(45		)
Accretion	48			38
Ending balance	$	1,272		$	985
Reflected as:
Other current liabilities	$	167		$	43
Other long-term liabilities	1,105			942
Total ARO liability	$	1,272		$	985

PacifiCorp [Member]

Asset Retirement Obligations Disclosure [Line Items]

Asset Retirement Obligation Disclosure [Table Text Block]

The following table reconciles the beginning and ending balances of PacifiCorp's ARO liabilities for the years ended December 31 (in millions):

	2019			2018
Beginning balance	$	227		$	215
Change in estimated costs	27			9
Additions	9			—
Retirements	(15		)	(5		)
Accretion	9			8
Ending balance	$	257		$	227
Reflected as:
Other current liabilities	$	19		$	21
Other long-term liabilities	238			206
	$	257		$	227

MidAmerican Energy Company [Member]

Asset Retirement Obligations Disclosure [Line Items]

Asset Retirement Obligations By Type [Table Text Block]

The following table presents MidAmerican Energy's ARO liabilities by asset type as of December 31 (in millions):

	2019		2018
Quad Cities Station	$	358	$	345
Fossil-fueled generating facilities	325		93
Wind-powered generating facilities	154		123
Other	2		1
Total asset retirement obligations	$	839	$	562
Quad Cities Station nuclear decommissioning trust funds(1)	$	599	$	504

(1) Refer to Note 6 for a discussion of the Quad Cities Station nuclear decommissioning trust funds.

Asset Retirement Obligation Disclosure [Table Text Block]

The following table reconciles the beginning and ending balances of MidAmerican Energy's ARO liabilities for the years ended December 31 (in millions):

	2019			2018
Beginning balance	$	562		$	559
Change in estimated costs	234			(10		)
Additions	27			17
Retirements	(14		)	(28		)
Accretion	30			24
Ending balance	$	839		$	562
Reflected as:
Other current liabilities	$	135		$	10
Asset retirement obligations	704			552
	$	839		$	562

Nevada Power Company [Member]

Asset Retirement Obligations Disclosure [Line Items]

Asset Retirement Obligations By Type [Table Text Block]

The following table presents Nevada Power's ARO liabilities by asset type as of December 31 (in millions):

	2019		2018
Waste water remediation	$	37	$	37
Evaporative ponds and dry ash landfills	12		12
Asbestos	—		5
Solar	2		2
Other	23		27
Total asset retirement obligations	$	74	$	83

Asset Retirement Obligation Disclosure [Table Text Block]

The following table reconciles the beginning and ending balances of Nevada Power's ARO liabilities for the years ended December 31 (in millions):

	2019			2018
Beginning balance	$	83		$	80
Change in estimated costs	6			11
Retirements	(19		)	(11		)
Accretion	4			3
Ending balance	$	74		$	83
Reflected as:
Other current liabilities	$	14		$	13
Other long-term liabilities	60			70
	$	74		$	83

Sierra Pacific Power Company [Member]

Asset Retirement Obligations Disclosure [Line Items]

Asset Retirement Obligations By Type [Table Text Block]

The following table presents Sierra Pacific's ARO liabilities by asset type as of December 31 (in millions):

	2019		2018
Asbestos	$	5	$	5
Evaporative ponds and dry ash landfills	2		2
Other	3		3
Total asset retirement obligations	$	10	$	10

Asset Retirement Obligation Disclosure [Table Text Block]

The following table reconciles the beginning and ending balances of Sierra Pacific's ARO liabilities for the years ended December 31 (in millions):

	2019		2018
Beginning balance	$	10	$	10
Accretion	—		—
Ending balance	$	10	$	10
Reflected as -
Other long-term liabilities	$	10	$	10