Leases (Details 1) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Future minimum capital lease payments
2013	$ 36
2014	35
2015	32
2016	29
2017	24
Years thereafter	55
Total minimum lease payments	211
Interest portion	(35)
Net minimum lease payments	176
Less current portion	32
Noncurrent portion	144
FES
Future minimum capital lease payments
2013	6
2014	6
2015	6
2016	5
2017	5
Years thereafter	2
Total minimum lease payments	30
Interest portion	(3)
Net minimum lease payments	27
Less current portion	5
Noncurrent portion	22
OE
Future minimum capital lease payments
2013	4
2014	4
2015	4
2016	4
2017	4
Years thereafter	13
Total minimum lease payments	33
Interest portion	(4)
Net minimum lease payments	29
Less current portion	3
Noncurrent portion	$ 26

Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal, through the balance sheet date and due to be paid within one year (or one operating cycle, if longer) of the balance sheet date.

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Amount of minimum lease payments maturing in the next fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the fifth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the forth fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the third fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing in the second fiscal year following the latest fiscal year for capital leases.

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Amount of minimum lease payments maturing after the fifth fiscal year following the latest fiscal year for capital leases.

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Amount necessary to reduce net minimum lease payments to present value for capital leases.

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Present value of minimum lease payments for capital leases net of executory costs, including amounts paid by the lessee to the lessor for insurance, maintenance and taxes.

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