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NUCLEAR PLANT (Tables)
3 Months Ended
Mar. 31, 2015
Schedule of Nuclear Decommissioning Trusts Investments [Abstract]  
Schedule of Nuclear Decommissioning Trusts Investments
NUCLEAR DECOMMISSIONING TRUSTS
(Dollars in millions)
GrossGrossEstimated
unrealizedunrealizedfair
Costgainslossesvalue
At March 31, 2015:
Debt securities:
Debt securities issued by the U.S. Treasury and other
U.S. government corporations and agencies(1)$103$8$$111
Municipal bonds(2)1348142
Other securities(3)2119(8)212
Total debt securities44825(8)465
Equity securities218452(4)666
Cash and cash equivalents1919
Total $685$477$(12)$1,150
At December 31, 2014:
Debt securities:
Debt securities issued by the U.S. Treasury and other
U.S. government corporations and agencies$103$6$$109
Municipal bonds1218129
Other securities2067(6)207
Total debt securities43021(6)445
Equity securities215444(4)655
Cash and cash equivalents30131
Total $675$466$(10)$1,131
(1)Maturity dates are 2015-2060.
(2)Maturity dates are 2015-2114.
(3)Maturity dates are 2015-2111.

SALES OF SECURITIES
(Dollars in millions)
Three months ended March 31,
20152014
Proceeds from sales(1)$94$195
Gross realized gains24
Gross realized losses(4)(4)
(1)Excludes securities that are held to maturity.