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Operating Units Other Segments (Details) (USD $) In Millions, unless otherwise specified |  |  | 0 Months Ended | 9 Months Ended |
--- | --- | --- | --- | --- | ---
Sep. 30, 2013 Real Estate Segment [Member] real_estate_properties | Dec. 31, 2012 Real Estate Segment [Member] | Oct. 02, 2013 New ARL [Member] Railcar Segment [Member] | Sep. 30, 2013 ARI [Member] | Sep. 30, 2013 Viskase [Member] manufacturing_facilities distribution_centers | Sep. 30, 2013 MASSACHUSETTS Real Estate Segment [Member] real_estate_property_units | Sep. 30, 2013 FLORIDA Real Estate Segment [Member] real_estate_property_units | Sep. 30, 2013 Las Vegas, Nevada [Member] [Member] Real Estate Segment [Member]
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |
Percentage of equity ownership in subsidiary |  |  | 75.00% | 55.60% | 70.80% |  |  |
Nnumber of Manufacturing Facilities |  |  |  |  | 8 |  |  |
Number of Distribution Centers |  |  |  |  | 10 |  |  |
Disclosure on geographic areas, Revenue from external customers attributed to foreign countries, Percentage |  |  |  |  | 71.00% |  |  |
Number of Real Estate commercial rental properties | 29 |  |  |  |  |  |  |
Number of units of residential housing in future development |  |  |  |  |  | 292 | 870 |
Acres of land |  |  |  |  |  |  |  | 23
Pledged assets | $ 57 | $ 73 |  |  |  |  |  |

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- Definition The carrying amount, as of the date of the latest financial statement presented, of all assets that are pledged as collateral for the payment of the related debt obligation primarily arising from secured borrowings, repurchase agreements or other current or potential obligations, where the secured party does not have the right by contract or custom to sell or re-pledge the collateral and therefore are not reclassified and separately reported in the statement of financial position. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 30 -Section 50 -Paragraph 1A -Subparagraph (b)(1)(i) -URI http://asc.fasb.org/extlink&oid=7523297&loc=SL6224234-111729 + Details
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- Definition The number of units or percentage investment held in the subsidiary by the limited liability company or limited partnership. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 22 -Article 12 + Details
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