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Operating Units Future minimum receipts of lease payments (Tables)

12 Months Ended

Dec. 31, 2011

Future Minimum Lease Receipts [Abstract]

Schedule of Future Minimum Rental Receipts [Table Text Block]

The following is a summary of the anticipated future receipts of the minimum lease payments receivable under the financing and operating method at December 31, 2011:

Year		Amount
		(in millions)
2012		$	52
2013		52
2014		48
2015		48
2016		46
Thereafter		178
		$	424

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Schedule of Future Minimum Rental Receipts [Table Text Block]

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