Long-Term Borrowings (Condensed Consolidating Statements Of Operation Restricted And Unrestricted) (Details) (USD $) In Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010		Jun. 30, 2011	Jun. 30, 2010
Interest income	$ 602.1	$ 1,023.8	[1]	$ 1,245.3	$ 2,128.5	[1],[2]
Total interest expense	(805.7)	(807.5)	[1]	(1,504.6)	(1,638.9)	[1],[2]
Net interest revenue	(203.6)	216.3	[1]	(259.3)	489.6	[1],[2]
Provision for credit losses	(84.7)	(246.7)	[1]	(208.1)	(472.8)	[1],[2]
Net interest revenue, after credit provision	(288.3)	(30.4)	[1]	(467.4)	16.8	[1],[2]
Equity in net income of subsidiaries				0	0	[2]
Rental income on operating leases	417.9	417.9	[1]	831.2	843.7	[1],[2]
Other	239.9	338.5	[1]	518.1	488.9	[1],[2]
Total other income	657.8	756.4	[1]	1,349.3	1,332.6	[1],[2]
Total revenue, net of interest expense and credit provision	369.5	726.0	[1]	881.9	1,349.4	[1],[2]
Depreciation on operating lease equipment	(145.5)	(178.1)	[1]	(306.0)	(350.8)	[1],[2]
Operating Expenses	(245.8)	(277.8)	[1]	(462.2)	(539.5)	[1],[2]
Total other expenses	(391.3)	(455.9)	[1]	(768.2)	(890.3)	[1],[2]
Income (loss) before income taxes	(21.8)	270.1	[1]	113.7	459.1	[1],[2]
Provision for income taxes	(26.9)	(88.2)	[1]	(92.6)	(131.6)	[1],[2]
Net income before attribution of noncontrolling interests	(48.7)	181.9	[1]	21.1	327.5	[1],[2]
Net income attributable to noncontrolling interests, after tax	0.7	(0.3)	[1]	(3.5)	(1.3)	[1],[2]
Net income (loss)	(48.0)	181.6	[1]	17.6	326.2	[1],[2],[3]
CIT Group Inc [Member]
Interest income				1.8	1.0	[2]
Total interest expense				(1,054.3)	(885.9)	[2]
Net interest revenue				(1,052.5)	(884.9)	[2]
Provision for credit losses				(6.7)	(11.1)	[2]
Net interest revenue, after credit provision				(1,059.2)	(896.0)	[2]
Equity in net income of subsidiaries				1,071.3	871.7	[2]
Rental income on operating leases				0	0	[2]
Other				(125.5)	233.5	[2]
Total other income				(125.5)	233.5	[2]
Total revenue, net of interest expense and credit provision				(113.4)	209.2	[2]
Depreciation on operating lease equipment				0	0	[2]
Operating Expenses				(11.0)	17.8	[2]
Total other expenses				(11.0)	17.8	[2]
Income (loss) before income taxes				(124.4)	227.0	[2]
Provision for income taxes				142.0	98.8	[2]
Net income before attribution of noncontrolling interests				17.6	325.8	[2]
Net income attributable to noncontrolling interests, after tax				0	0	[2]
Net income (loss)				17.6	325.8	[2]
Restricted Entities [Member]
Interest income				679.8	1,357.1	[2]
Total interest expense				(193.2)	(445.7)	[2]
Net interest revenue				486.6	911.4	[2]
Provision for credit losses				(126.8)	(358.6)	[2]
Net interest revenue, after credit provision				359.8	552.8	[2]
Equity in net income of subsidiaries				711.0	203.4	[2]
Rental income on operating leases				689.9	687.0	[2]
Other				528.1	279.0	[2]
Total other income				1,218.0	966.0	[2]
Total revenue, net of interest expense and credit provision				2,288.8	1,722.2	[2]
Depreciation on operating lease equipment				(246.1)	(290.1)	[2]
Operating Expenses				(382.8)	(491.3)	[2]
Total other expenses				(628.9)	(781.4)	[2]
Income (loss) before income taxes				1,659.9	940.8	[2]
Provision for income taxes				(174.2)	(134.9)	[2]
Net income before attribution of noncontrolling interests				1,485.7	805.9	[2]
Net income attributable to noncontrolling interests, after tax				0.4	0	[2]
Net income (loss)				1,486.1	805.9	[2]
Unrestricted Entities [Member]
Interest income				568.3	795.7	[2]
Total interest expense				(264.9)	(320.6)	[2]
Net interest revenue				303.4	475.1	[2]
Provision for credit losses				(74.6)	(110.0)	[2]
Net interest revenue, after credit provision				228.8	365.1	[2]
Equity in net income of subsidiaries				0	(87.2)	[2]
Rental income on operating leases				141.3	157.7	[2]
Other				126.8	(11.0)	[2]
Total other income				268.1	146.7	[2]
Total revenue, net of interest expense and credit provision				496.9	424.6	[2]
Depreciation on operating lease equipment				(59.9)	(61.2)	[2]
Operating Expenses				(82.3)	(91.8)	[2]
Total other expenses				(142.2)	(153.0)	[2]
Income (loss) before income taxes				354.7	271.6	[2]
Provision for income taxes				(68.0)	(96.1)	[2]
Net income before attribution of noncontrolling interests				286.7	175.5	[2]
Net income attributable to noncontrolling interests, after tax				0.5	0.4	[2]
Net income (loss)				287.2	175.9	[2]
Restricted And Unrestricted Entities Eliminations [Member]
Interest income				(4.6)	(25.3)	[2]
Total interest expense				7.8	13.3	[2]
Net interest revenue				3.2	(12.0)	[2]
Provision for credit losses				0	6.9	[2]
Net interest revenue, after credit provision				3.2	(5.1)	[2]
Equity in net income of subsidiaries				(1,782.3)	(987.9)	[2]
Rental income on operating leases				0	(1.0)	[2]
Other				(11.3)	(12.6)	[2]
Total other income				(11.3)	(13.6)	[2]
Total revenue, net of interest expense and credit provision				(1,790.4)	(1,006.6)	[2]
Depreciation on operating lease equipment				0	0.5	[2]
Operating Expenses				13.9	25.8	[2]
Total other expenses				13.9	26.3	[2]
Income (loss) before income taxes				(1,776.5)	(980.3)	[2]
Provision for income taxes				7.6	0.6	[2]
Net income before attribution of noncontrolling interests				(1,768.9)	(979.7)	[2]
Net income attributable to noncontrolling interests, after tax				(4.4)	(1.7)	[2]
Net income (loss)				$ (1,773.3)	$ (981.4)	[2]

[1] These restated balances were disclosed in Note 26 of the Company's Form 10-K for the year ended December 31, 2010.

[2] 2010 data has been conformed to the current quarter presentation.

[3] These restated balances were disclosed in Note 26 of the Company's Form 10-K for the year ended December 31, 2010.