Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Shareholders' equity:
Common Stock, Shares Authorized	115,000,000	115,000,000
Common Stock, stated value per share	$ 0	$ 0
Common Stock, Shares, Issued	76,000,000	77,000,000
Common Stock, Shares, Outstanding	76,000,000	77,000,000
Total equity	$ 46,977	$ 32,578	$ 29,723	$ 28,308
Proceeds from Issuance of Preferred Stock and Preference Stock	3,750	0	0
Dividends, Preferred Stock	(26)	0	0
Acquisition of public interest in Northeast Midstream	(33)
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	(3,916)
Distributions	(121)	(22)	(23)
Common stock, value, repurchased	(126)	(293)	(107)
Other equity transactions	$ 1	$ 3	11
PacifiCorp [Member]
Shareholders' equity:
Common Stock, Shares Authorized	750,000,000	750,000,000
Common Stock, stated value per share	$ 0	$ 0
Common Stock, Shares, Issued	357,000,000	357,000,000
Common Stock, Shares, Outstanding	357,000,000	357,000,000
MidAmerican Energy Company [Member]
Shareholders' equity:
Other equity transactions	$ (1)	$ 1
Nevada Power Company [Member]
Shareholders' equity:
Common Stock, Shares Authorized	1,000	1,000
Common Stock, stated value per share	$ 1.00	$ 1.00
Common Stock, Shares, Issued	1,000	1,000
Common Stock, Shares, Outstanding	1,000	1,000
Other equity transactions	$ 2
Sierra Pacific Power Company [Member]
Shareholders' equity:
Common Stock, Shares Authorized	20,000,000	20,000,000
Common Stock, stated value per share	$ 3.75	$ 3.75
Common Stock, Shares, Issued	1,000	1,000
Common Stock, Shares, Outstanding	1,000	1,000
Other equity transactions		$ (1)
Common Stock [Member]
Shareholders' equity:
Distributions	$ 0	0	0
Common stock, value, repurchased	0	0	0
Other equity transactions	0	0	0
Common Stock, Value, Outstanding	$ 0	$ 0	$ 0	$ 0
Common Stock [Member] | MidAmerican Energy Company [Member]
Shareholders' equity:
Common Stock, Shares Authorized	350,000,000	350,000,000
Common Stock, stated value per share	$ 0	$ 0
Common Stock, Shares, Issued	71,000,000	71,000,000
Common Stock, Shares, Outstanding	71,000,000	71,000,000
Common Stock [Member] | Nevada Power Company [Member]
Shareholders' equity:
Common Stock, Shares, Outstanding	1,000	1,000	1,000	1,000
Common Stock [Member] | Sierra Pacific Power Company [Member]
Shareholders' equity:
Common Stock, Shares, Outstanding	1,000	1,000	1,000	1,000
Preferred Stock [Member]
Shareholders' equity:
Proceeds from Issuance of Preferred Stock and Preference Stock	$ 3,750
Preferred Stock, Value, Outstanding	3,750	$ 0	$ 0	$ 0
Additional Paid-in Capital [Member]
Shareholders' equity:
Total equity	6,377	6,389	6,371	6,368
Acquisition of public interest in Northeast Midstream	(5)
Distributions	0	0	0
Common stock, value, repurchased	(6)	(15)	(6)
Other equity transactions	(1)	0	9
Retained Earnings [Member]
Shareholders' equity:
Total equity	35,093	28,296	25,624	22,206
Dividends, Preferred Stock	(26)
Distributions	0	0	0
Common stock, value, repurchased	(120)	(278)	(101)
Other equity transactions	0	0	1
Retained Earnings [Member] | MidAmerican Energy Company [Member]
Shareholders' equity:
Other equity transactions	(1)	1
Retained Earnings [Member] | Nevada Power Company [Member]
Shareholders' equity:
Other equity transactions	1
Retained Earnings [Member] | Sierra Pacific Power Company [Member]
Shareholders' equity:
Other equity transactions			(1)
Noncontrolling Interest [Member]
Shareholders' equity:
Total equity	3,967	129	130	132
Acquisition of public interest in Northeast Midstream	28
Noncontrolling Interest, Increase from Sale of Parent Equity Interest	3,916
Distributions	(121)	(22)	(23)
Common stock, value, repurchased	0	0	0
Other equity transactions	1	3	1
Long-term income tax receivable [Member]
Shareholders' equity:
Distributions	0	0	0
Common stock, value, repurchased	0	0	0
Other equity transactions	0	0	0
Accumulated Other Comprehensive Income (Loss) [Member]
Shareholders' equity:
Total equity	(1,552)	(1,706)	(1,945)	$ (398)
Distributions	0	0	0
Common stock, value, repurchased	0	0	0
Other equity transactions	1	0	0
Accumulated Other Comprehensive Income (Loss) [Member] | Nevada Power Company [Member]
Shareholders' equity:
Other equity transactions	$ 1
Accumulated Other Comprehensive Income (Loss) [Member] | Sierra Pacific Power Company [Member]
Shareholders' equity:
Other equity transactions		$ (1)	$ 1