Partially-Owned Leasing Subsidiaries	3 Months Ended
Partially-Owned Leasing Subsidiaries	Mar. 31, 2015
Partially-Owned Leasing Subsidiaries [Abstract]
Partially-Owned Leasing Subsidiaries	Partially-Owned Leasing Subsidiaries The Company, through its wholly-owned subsidiary, TILC, formed two subsidiaries, TRIP Holdings and RIV 2013, for the purpose of providing railcar leasing in North America. Each of TRIP Holdings and RIV 2013 are direct, partially-owned subsidiaries of TILC in which the Company has a controlling interest. Each is governed by a seven-member board of representatives, two of whom are designated by TILC. TILC is the agent of each of TRIP Holdings and RIV 2013 and as such, has been delegated the authority, power, and discretion to take certain actions on behalf of the respective companies. At March 31, 2015, the Company's carrying value of its investment in TRIP Holdings and RIV 2013 totaled $227.8 million representing the Company's weighted average 39% ownership interest. The remaining 61% weighted average interest is owned by institutional investors. The Company's investments in its partially-owned leasing subsidiaries are eliminated in consolidation. Each of TRIP Holdings and RIV 2013 has wholly-owned subsidiaries which are the owners of railcars acquired from the Company's Rail and Leasing Groups. These wholly-owned subsidiaries are TRIP Master Funding (wholly-owned by TRIP Holdings) and Trinity Rail Leasing 2012 LLC ("TRL 2012", wholly-owned by RIV 2013). Railcar purchases were funded by secured borrowings and capital contributions from TILC and third-party equity investors.TILC is the contractual servicer for TRIP Master Funding and TRL 2012, with the authority to manage and service each entity's owned railcars. The Company's controlling interest in each of TRIP Holdings and RIV 2013 results from its combined role as both equity member and agent/servicer. The noncontrolling interest included in the accompanying consolidated balance sheets represents the non-Trinity equity interest in these partially-owned subsidiaries. Trinity has no obligation to guarantee performance under any of the partially-owned subsidiaries' (or their respective subsidiaries') debt agreements, guarantee any railcar residual values, shield any parties from losses, or guarantee minimum yields. The assets of each of TRIP Master Funding and TRL 2012 may only be used to satisfy the particular subsidiary's liabilities, and the creditors of each of TRIP Master Funding and TRL 2012 have recourse only to the particular subsidiary's assets. Each of TILC and the third-party equity investors receive distributions from TRIP Holdings and RIV 2013, when allowed, in proportion to its respective equity interests, and has an interest in the net assets of the partially-owned subsidiaries upon a liquidation event in the same proportion. TILC is paid fees for the services it provides to TRIP Master Funding and TRL 2012 and has the potential to earn certain incentive fees. With respect to TRIP Holdings as of March 31, 2015, TILC has a commitment that expires in May 2016 to provide additional equity funding of up to $5.7 million for the purchase of railcars and satisfaction of certain other liabilities of TRIP Holdings. The third-party equity investors in TRIP Holdings have a similar commitment that expires in May 2016 to provide up to $12.9 million of additional equity funding. TILC and the third-party equity investors may have additional commitments to provide equity funding to TRIP Holdings that expire in May 2019 contingent upon certain returns on investment in TRIP Holdings and other conditions being met. See Note 11 Debt regarding the debt of TRIP Holdings and RIV 2013 and their respective subsidiaries.

The entire disclosure for noncontrolling interest in consolidated subsidiaries, which could include the name of the subsidiary, the ownership percentage held by the parent, the ownership percentage held by the noncontrolling owners, the amount of the noncontrolling interest, the location of this amount on the balance sheet (when not reported separately), an explanation of the increase or decrease in the amount of the noncontrolling interest, the noncontrolling interest share of the net Income or Loss of the subsidiary, the location of this amount on the income statement (when not reported separately), the nature of the noncontrolling interest such as background information and terms, the amount of the noncontrolling interest represented by preferred stock, a description of the preferred stock, and the dividend requirements of the preferred stock.

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