Long-Term Borrowings (Schedule Of Outstanding Long-Term Borrowings) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2011		Mar. 31, 2011	Dec. 31, 2010
Total debt	$ 30,891.1	[1]		$ 33,979.8	[1]
Debt instrument stated interest rate			5.25%
Secured Borrowings [Member]
Total debt	9,858.8	[1]		10,965.8	[1]
Secured Borrowings [Member] | CIT Group Inc [Member]
Total debt	0	[1]
Secured Borrowings [Member] | Subsidiaries [Member]
Total debt	9,858.8	[1]
CIT Group Inc [Member] | First Lien Facility [Member]
Total debt	197.9	[1]
Subsidiaries [Member] | First Lien Facility [Member]
Total debt	2,841.3	[1]
First Lien Facility [Member]
Total debt	3,039.2	[1]		3,042.6	[1]
CIT Group Inc [Member] | Series A Notes [Member]
Total debt	7,939.8	[1]
Subsidiaries [Member] | Series A Notes [Member]
Total debt	0	[1]
Series A Notes [Member]
Total debt	7,939.8	[1]		19,037.9	[1]
Debt instrument stated interest rate	7.00%
CIT Group Inc [Member] | Series B Notes [Member]
Total debt	0	[1]
Subsidiaries [Member] | Series B Notes [Member]
Total debt	0	[1]
Series B Notes [Member]
Total debt	0	[1]		765.8	[1]
Debt instrument stated interest rate	10.25%
CIT Group Inc [Member] | Series C Notes [Member]
Total debt	7,892.0	[1]
Subsidiaries [Member] | Series C Notes [Member]
Total debt	0	[1]
Series C Notes [Member]
Total debt	7,892.0	[1]		0	[1]
Debt instrument stated interest rate	7.00%
Series C Notes - Other [Member]
Total debt	2,000.0	[1]		0	[1]
Series C Notes - Other [Member] | CIT Group Inc [Member]
Total debt	2,000.0	[1]
Series C Notes - Other [Member] | Subsidiaries [Member]
Total debt	0	[1]
Other Debt [Member]
Total debt	161.3	[1]		167.7	[1]
Other Debt [Member] | CIT Group Inc [Member]
Total debt	84.6	[1]
Other Debt [Member] | Subsidiaries [Member]
Total debt	76.7	[1]
CIT Group Inc [Member]
Total debt	18,114.3	[1]
Subsidiaries [Member]
Total debt	$ 12,776.8	[1]

[1] The presented rates are contractual and do not reflect the impact of FSA. Rates associated with the Series C - other are discussed further below.