Leases (Tables)

12 Months Ended

Dec. 31, 2011

Leases (Tables) [Abstract]

Lease Rental Costs

	Years Ended December 31,
Lease Rental Costs	2011		2010		2009
	(in millions)
Net Lease Expense on Operating Leases	$	343	$	343	$	354
Amortization of Capital Leases		72		97		83
Interest on Capital Leases		32		26		13
Total Lease Rental Costs	$	447	$	466	$	450

Property, Plant and Equipment Under Capital Leases

	December 31,
Property, Plant and Equipment Under Capital Leases	2011		2010
	(in millions)
Generation	$	104	$	97
Other Property, Plant and Equipment		485		482
Total Property, Plant and Equipment Under Capital Leases		589		579
Accumulated Amortization		137		108
Net Property, Plant and Equipment Under Capital Leases	$	452	$	471

Obligations Under Capital Leases

Obligations Under Capital Leases
Noncurrent Liability	$	384	$	398
Liability Due Within One Year		74		76
Total Obligations Under Capital Leases	$	458	$	474

Future Minimum Lease Payments

				Noncancelable
Future Minimum Lease Payments		Capital Leases		Operating Leases
		(in millions)
2012		$	96	$	316
2013			81		288
2014			67		264
2015			55		245
2016			47		226
Later Years			285		1,235
Total Future Minimum Lease Payments			631	$	2,574
Less Estimated Interest Element			173
Estimated Present Value of Future Minimum
	Lease Payments	$	458

Future Minimum Lease Payments of Rockport Lease

Future Minimum Lease Payments	AEGCo		I&M
	(in millions)
2012	$	74	$	74
2013		74		74
2014		74		74
2015		74		74
2016		74		74
Later Years		443		443
Total Future Minimum Lease Payments	$	813	$	813