Long-Term Borrowings (Condensed Consolidating Statements Of Operation) (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]
Guarantor Entities [Member]
Interest income				469.6	980.1	[2]
Total interest expense				(143.1)	(290.1)	[2]
Net interest revenue				326.5	690.0	[2]
Provision for credit losses				(42.5)	280.9	[2]
Net interest revenue, after credit provision				284.0	409.1	[2]
Equity in net income of subsidiaries				609.1	519.2	[2]
Rental income on operating leases				289.7	277.2	[2]
Other				336.0	65.2	[2]
Total other income				625.7	342.4	[2]
Total revenue, net of interest expense and credit provision				1,518.8	1,270.7	[2]
Depreciation on operating lease equipment				(100.8)	(125.7)	[2]
Operating Expenses				(277.8)	(342.8)	[2]
Total other expenses				(378.6)	(468.5)	[2]
Income (loss) before income taxes				1,140.2	802.2	[2]
Provision for income taxes				(103.7)	1.5	[2]
Net income before attribution of noncontrolling interests				1,036.5	803.7	[2]
Net income attributable to noncontrolling interests, after tax				0	0.4	[2]
Net income (loss)				1,036.5	804.1	[2]
Pledged Entities [Member]
Interest income				181.7	312.8	[2]
Total interest expense				(116.0)	(216.8)	[2]
Net interest revenue				65.7	96.0	[2]
Provision for credit losses				(86.3)	(51.5)	[2]
Net interest revenue, after credit provision				(20.6)	44.5	[2]
Equity in net income of subsidiaries				216.5	263.9	[2]
Rental income on operating leases				359.2	364.6	[2]
Other				91.8	190.1	[2]
Total other income				451.0	554.7	[2]
Total revenue, net of interest expense and credit provision				646.9	863.1	[2]
Depreciation on operating lease equipment				(123.2)	(129.6)	[2]
Operating Expenses				(76.7)	(95.2)	[2]
Total other expenses				(199.9)	(224.8)	[2]
Income (loss) before income taxes				447.0	638.3	[2]
Provision for income taxes				(59.5)	(130.9)	[2]
Net income before attribution of noncontrolling interests				387.5	507.4	[2]
Net income attributable to noncontrolling interests, after tax				0.4	(0.5)	[2]
Net income (loss)				387.9	506.9	[2]
Other Non Guarantor Entities [Member]
Interest income				596.8	859.9	[2]
Total interest expense				(199.0)	(259.4)	[2]
Net interest revenue				397.8	600.5	[2]
Provision for credit losses				(72.6)	(136.2)	[2]
Net interest revenue, after credit provision				325.2	464.3	[2]
Equity in net income of subsidiaries				56.7	291.7	[2]
Rental income on operating leases				182.3	202.9	[2]
Other				227.1	12.7	[2]
Total other income				409.4	215.6	[2]
Total revenue, net of interest expense and credit provision				791.3	971.6	[2]
Depreciation on operating lease equipment				(82.0)	(96.0)	[2]
Operating Expenses				(110.6)	(145.1)	[2]
Total other expenses				(192.6)	(241.1)	[2]
Income (loss) before income taxes				598.7	730.5	[2]
Provision for income taxes				(79.0)	(101.6)	[2]
Net income before attribution of noncontrolling interests				519.7	628.9	[2]
Net income attributable to noncontrolling interests, after tax				0.5	0.5	[2]
Net income (loss)				520.2	629.4	[2]
Guarantor And Non Guarantor 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				(1,953.6)	(1,946.5)	[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				(1,961.7)	(1,965.2)	[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				(1,947.8)	(1,938.9)	[2]
Provision for income taxes				7.6	0.6	[2]
Net income before attribution of noncontrolling interests				(1,940.2)	(1,938.3)	[2]
Net income attributable to noncontrolling interests, after tax				(4.4)	(1.7)	[2]
Net income (loss)				$ (1,944.6)	$ (1,940.0)	[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.