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Commitments (Tables)

12 Months Ended

Dec. 31, 2012

Operating Leases Of Lessee Disclosure Text Block

		Future Commitments for
December 31,		Capital Leases		Operating Leases
		(in millions)
2013	.	$	12	$	53
2014	.		12		51
2015	.		11		48
2016	.		11		47
2017	.		11		47
Thereafter			160		517
Total			217	$	763
Less: Imputed interest			138
Present value of total minimum lease payments		$	79

Electricity Purchase Contract Commitment

		Electricity Purchase Contracts		Fuel Purchase Contracts		Other Purchase Contracts
Actual purchases during the year ended December 31,		(in millions)

2010	.	$	2,422	$	1,686	$	1,652
2011	.		2,463		1,577		1,767
2012	.		2,819		1,860		1,701


Future commitments for the year ending December 31,
2013	.	$	2,599	$	1,555	$	1,976
2014	.		3,008		998		1,743
2015	.		2,952		555		1,629
2016	.		2,971		428		1,202
2017	.		2,351		416		1,093
Thereafter			25,001		4,618		11,153
Total		$	38,882	$	8,570	$	18,796

- Definition

Tabular disclosure of a lessee's leasing arrangements including: (1) the basis on which contingent rental payments are determined, (2) the existence and terms of renewal or purchase options and escalation clauses, (3) restrictions imposed by lease arrangements, such as those concerning dividends, additional debt, and further leasing, (4) rent holidays, rent concessions, or leasehold improvement incentives and unusual provisions or conditions. Disclosure may also include the specific period used to amortize material leasehold improvements made at the inception of the lease or during the lease term. Additionally, for operating leases having initial or remaining noncancelable lease terms in excess of one year: (a) future minimum rental payments required as of the date of the latest balance sheet presented, in the aggregate and for each of the five succeeding fiscal years, (b) the total of minimum rentals to be received in the future under noncancelable subleases as of the date of the latest balance sheet presented, and (c) for all operating leases, rental expense for each period for which an income statement is presented, with separate amounts for minimum rentals, contingent rentals, and sublease rentals. Rental payments under leases with terms of a month or less that were not renewed need not be included.

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