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Operating Units (Tables) | 12 Months Ended
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Dec. 31, 2016
Operating Units [Abstract] |
Schedule of Future Minimum Rental Receipts [Table Text Block] | Consolidated Anticipated Future Receipts The following is a summary of the consolidated anticipated future receipts of the minimum lease payments receivable under the financing and operating method on a consolidated basis at December 31, 2016:
Year |  | Amount
|  | (in millions)
2017 |  | $ | 255 |
2018 |  | 224 |
2019 |  | 165 |
2020 |  | 102 |
2021 |  | 51 |
Thereafter |  | 63 |
|  | $ | 860 |

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