Leases (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011
Future minimum operating lease payments
2012	$ 258
2013	252
2014	240
2015	283
2016	315
Years thereafter	1,799
Total minimum lease payments	3,147
Lease Payments [Member]
Future minimum operating lease payments
2012	383
2013	382
2014	371
2015	373
2016	344
Years thereafter	1,803
Total minimum lease payments	3,656
Capital Trusts [Member]
Future minimum operating lease payments
2012	125	[1]
2013	130	[1]
2014	131	[1]
2015	90	[1]
2016	29	[1]
Years thereafter	4	[1]
Total minimum lease payments	509	[1]
FES
Future minimum operating lease payments
2012	237
2013	241
2014	236
2015	239
2016	230
Years thereafter	1,662
Total minimum lease payments	2,845
OE
Future minimum operating lease payments
2012	147	[2]
2013	146	[2]
2014	145	[2]
2015	145	[2]
2016	117	[2]
Years thereafter	49	[2]
Total minimum lease payments	749	[2]
CEI
Future minimum operating lease payments
2012	4
2013	3
2014	3
2015	2
2016	3
Years thereafter	4
Total minimum lease payments	19
TE
Future minimum operating lease payments
2012	64	[2]
2013	64	[2]
2014	64	[2]
2015	64	[2]
2016	64	[2]
Years thereafter	14	[2]
Total minimum lease payments	334	[2]
JCP&L
Future minimum operating lease payments
2012	7
2013	7
2014	6
2015	5
2016	5
Years thereafter	48
Total minimum lease payments	78
Met-Ed
Future minimum operating lease payments
2012	4
2013	4
2014	3
2015	4
2016	3
Years thereafter	37
Total minimum lease payments	55
Penelec
Future minimum operating lease payments
2012	3
2013	3
2014	2
2015	2
2016	2
Years thereafter	12
Total minimum lease payments	$ 24

[1] PNBV and Shippingport purchased a portion of the lease obligation bonds associated with certain sale and leaseback transactions. These arrangements effectively reduce lease costs related to those transactions.

[2] Includes certain minimum lease payments associated with NGC's lessor equity interests in Perry and Beaver Valley Unit 2 that are eliminated in consolidation.