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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

X

- Definition

Acres of land

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- Definition

Disclosure on Geographic Areas, Revenue from External Customers Attributed to Foreign Countries, Percentage

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- Definition

Nnumber of Manufacturing Facilities

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- Definition

Number of Distribution Centers

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- Definition

Number of Units of Residential Housing in Future Development

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- Definition

The number of real estate properties owned as of the balance sheet date.

+ References

No definition available.

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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

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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

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