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Operating Units Other Segments and Other Information (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Segment Reporting Information [Line Items] |  |  |
Operating Leases, Future Minimum Payments Receivable, Current | 89 |  |
Operating Leases, Future Minimum Payments Receivable, in Two Years | 82 |  |
Operating Leases, Future Minimum Payments Receivable, in Three Years | 71 |  |
Operating Leases, Future Minimum Payments Receivable, in Four Years | 69 |  |
Operating Leases, Future Minimum Payments Receivable, in Five Years | 61 |  |
Operating Leases, Future Minimum Payments Receivable, Thereafter | 157 |  |
Operating Leases, Future Minimum Payments Receivable | 529 |  |
Real Estate Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of Real Estate Properties | 29 |  |
Real estate assets pledged to collateralize mortgages | 73 | 77 |
Viskase [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage of equity ownership in subsidiary | 70.80% |  |
Number of distribution centers | 10 |  |
Number of manufacturing facilities | 8 |  |
Percentage of revenues from foreign countries | 70.00% |  |
ARI [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Percentage of equity ownership in subsidiary | 55.60% |  |
Group of Customers, Group One [Member] | WestPoint Home [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Subsidiary's significant customers, percentage of subsidiary's net revenue | 63.00% | 51.00% | 58.00%
Group of Customers, Group two [Member] | ARI [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Subsidiary's significant customers, percentage of subsidiary's net revenue | 64.00% | 39.00% | 43.00%
MASSACHUSETTS | Real Estate Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of residential units for future development | 322 |  |
FLORIDA | Real Estate Segment [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Number of residential units for future development | 870 |  |

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