Accumulated Other Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI Beginning Balance	$ 385	$ 426	$ 425
Other comprehensive income (loss) before reclassifications	52	120	118
Amounts reclassified from AOCI	(153)	(161)	(117)
Other comprehensive income (loss), net of tax	(101)	(41)	1
AOCI Ending Balance	284	385	426
FES
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI Beginning Balance	72	76	62
Other comprehensive income (loss) before reclassifications	29	54	41
Amounts reclassified from AOCI	(47)	(58)	(27)
Other comprehensive income (loss), net of tax	(18)	(4)	14
AOCI Ending Balance	54	72	76
Gains & Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI Beginning Balance	(38)	(39)	(54)
Other comprehensive income (loss) before reclassifications	0	0	(9)
Amounts reclassified from AOCI	2	1	24
Other comprehensive income (loss), net of tax	2	1	15
AOCI Ending Balance	(36)	(38)	(39)
Gains & Losses on Cash Flow Hedges | FES
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI Beginning Balance	3	8	1
Other comprehensive income (loss) before reclassifications	0	0	(9)
Amounts reclassified from AOCI	(4)	(5)	16
Other comprehensive income (loss), net of tax	(4)	(5)	7
AOCI Ending Balance	(1)	3	8
Unrealized Gains on AFS Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI Beginning Balance	15	19	7
Other comprehensive income (loss) before reclassifications	29	41	49
Amounts reclassified from AOCI	(35)	(45)	(37)
Other comprehensive income (loss), net of tax	(6)	(4)	12
AOCI Ending Balance	9	15	19
Unrealized Gains on AFS Securities | FES
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI Beginning Balance	13	16	6
Other comprehensive income (loss) before reclassifications	26	38	42
Amounts reclassified from AOCI	(31)	(41)	(32)
Other comprehensive income (loss), net of tax	(5)	(3)	10
AOCI Ending Balance	8	13	16
Defined Benefit Pension & OPEB Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI Beginning Balance	408	446	472
Other comprehensive income (loss) before reclassifications	23	79	78
Amounts reclassified from AOCI	(120)	(117)	(104)
Other comprehensive income (loss), net of tax	(97)	(38)	(26)
AOCI Ending Balance	311	408	446
Defined Benefit Pension & OPEB Plans | FES
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
AOCI Beginning Balance	56	52	55
Other comprehensive income (loss) before reclassifications	3	16	8
Amounts reclassified from AOCI	(12)	(12)	(11)
Other comprehensive income (loss), net of tax	(9)	4	(3)
AOCI Ending Balance	$ 47	$ 56	$ 52