Leases (Details 2) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014
Future minimum operating lease payments
2015	$ 205
2016	184
2017	119
2018	128
2019	109
Years thereafter	1,482
Total minimum lease payments	2,227
Lease Payments
Future minimum operating lease payments
2015	245
2016	197
2017	122
2018	128
2019	109
Years thereafter	1,482
Total minimum lease payments	2,283
PNBV Capital Trust
Future minimum operating lease payments
2015	40
2016	13
2017	3
2018	0
2019	0
Years thereafter	0
Total minimum lease payments	56
FES
Future minimum operating lease payments
2015	142
2016	131
2017	81
2018	101
2019	97
Years thereafter	1,383
Total minimum lease payments	$ 1,935

Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 2

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 10

-Section 55

-Paragraph 40

-Subparagraph (Note 3)

-URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due in the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Amount of required minimum rental payments for operating leases having an initial or remaining non-cancelable lease term in excess of one year due after the fifth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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