Consolidated Statements of Capitalization (MEC) (MidAmerican Energy Company [Member], USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
MidAmerican Energy common shareholder's equity	$ 3,845	$ 3,608
MidAmerican Energy preferred securities	0	27
Long-term debt, excluding current portion	3,202	2,590
Total capitalization	7,047	6,225
MidAmerican Energy Company [Member]
Long-term debt, excluding current portion	3,202	2,590
Obligations under capital leases	0	1
Unamortized debt discount	(19)	(32)
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 2.40%, Due 2019 [Member]
Noncurrent debt, face amount	350	0
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 3.70%, Due 2023 [Member]
Noncurrent debt, face amount	250	0
MidAmerican Energy Company [Member] | MEC First Mortgage Bonds, 4.80%, Due 2043 [Member]
Noncurrent debt, face amount	350	0
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2016 [Member]
Noncurrent debt, face amount	34	34
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2017 [Member]
Noncurrent debt, face amount	4	4
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2023, issued in 1993 [Member]
Noncurrent debt, face amount	7	7
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2023, issued in 2008 [Member]
Noncurrent debt, face amount	57	57
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2024 [Member]
Noncurrent debt, face amount	35	35
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2025 [Member]
Noncurrent debt, face amount	13	13
MidAmerican Energy Company [Member] | Variable-rate tax-exempt obligation series, due 2038 [Member]
Noncurrent debt, face amount	45	45
MidAmerican Energy Company [Member] | Notes, 4.65% Series, due 2014 [Member]
Noncurrent debt, face amount	0	350
MidAmerican Energy Company [Member] | Notes, 5.95% Series, due 2017 [Member]
Noncurrent debt, face amount	250	250
MidAmerican Energy Company [Member] | Notes, 5.3% Series, due 2018 [Member]
Noncurrent debt, face amount	350	350
MidAmerican Energy Company [Member] | Notes, 6.75% Series, due 2031 [Member]
Noncurrent debt, face amount	400	400
MidAmerican Energy Company [Member] | Notes, 5.75% Series, due 2035 [Member]
Noncurrent debt, face amount	300	300
MidAmerican Energy Company [Member] | Notes, 5.8% Series, due 2036 [Member]
Noncurrent debt, face amount	350	350
MidAmerican Energy Company [Member] | Turbine purchase obligation, 1.43%, due 2015 [Member]
Noncurrent debt, face amount	426	426
MidAmerican Energy common shareholder's equity [Member]
MidAmerican Energy common shareholder's equity	3,845	3,608
Common Stock [Member]
Common shares, no par; 350,000,000 authorized; 70,980,203 outstanding	561	562
Retained Earnings [Member]
Retained earnings	3,295	3,070
Accumulated Other Comprehensive Income (Loss) [Member]
Unrealized losses on available-for-sale securities, net of tax of $(3) and $(4)	(4)	(5)
Unrealized losses on cash flow hedges, net of tax of $(4) and $(13)	(7)	(19)
Total preferred securities; (100,000,000 shares authorized); not subject to mandatory redemption: [Member]
MidAmerican Energy preferred securities	$ 0	$ 27