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Operating Units (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2012
Future minimum operating lease revneue [Line Items] |
Schedule of Future Minimum Rental Receipts [Table Text Block] | . Consolidated Anticipated Future Receipts The following is a summary of the anticipated future receipts of the minimum lease payments receivable under the financing and operating method on a consolidated basis at December 31, 2012:
Year |  | Amount
|  | (in millions)
2013 |  | $ | 89 |
2014 |  | 82 |
2015 |  | 71 |
2016 |  | 69 |
2017 |  | 61 |
Thereafter |  | 157 |
|  | $ | 529 |

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- Definition Schedule of Future Minimum Rental Receipts [Table Text Block] + References No definition available. + Details
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