Consolidated Statements of Changes in Equity (LLC) (MidAmerican Funding, LLC and Subsidiaries [Domain], USD $) In Millions, unless otherwise specified	MidAmerican Funding, LLC and Subsidiaries [Domain] USD ($)	MidAmerican Funding, LLC and Subsidiaries [Domain] Additional Paid-in Capital [Member] USD ($)	MidAmerican Funding, LLC and Subsidiaries [Domain] Retained Earnings [Member] USD ($)	MidAmerican Funding, LLC and Subsidiaries [Domain] Accumulated Other Comprehensive Income (Loss) [Member] USD ($)	MidAmerican Funding, LLC and Subsidiaries [Domain] Noncontrolling Interest [Member] USD ($)
Balance at Dec. 31, 2010	$ 3,701	$ 1,679	$ 2,023	$ (29)	$ 28
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	305		304		1
Other comprehensive income (loss)	(5)			(5)
Distributions to noncontrolling interests	(1)				(1)
Balance at Dec. 31, 2011	4,000	1,679	2,327	(34)	28
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	71
Balance at Mar. 31, 2012
Balance at Dec. 31, 2011	4,000	1,679	2,327	(34)	28
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	343		342		1
Other comprehensive income (loss)	10			10
Disposition of subsidiary	(1)				(1)
Distributions to noncontrolling interests	(1)				(1)
Balance at Dec. 31, 2012	4,351	1,679	2,669	(24)	27
Balance at Sep. 30, 2012
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	58
Balance at Dec. 31, 2012	4,351	1,679
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	100
Balance at Mar. 31, 2013
Balance at Dec. 31, 2012	4,351	1,679	2,669	(24)	27
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	341		340		1
Other comprehensive income (loss)	13			13
Redemption of preferred securities of subsidiary	(28)				(28)
Balance at Dec. 31, 2013	4,677	1,679	3,009	(11)	0
Balance at Sep. 30, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	76
Balance at Dec. 31, 2013	$ 4,677	$ 1,679