Long-Term Borrowings (Condensed Consolidating Statements Of Cash Flows) (Details) (USD $) In Millions	6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
Net cash flows provided by (used for) operations	$ 255.6	$ 178.1	[1],[2]
Net decrease in financing and leasing assets and other investing activities	(344.2)	7,122.8	[1]
(Increase) decrease in inter-company loans and investments	0	0	[1]
Net cash flows (used in) provided by investing activities	(344.2)	7,122.8	[1],[2]
Net increase (decrease) in debt and other financing activities	(3,631.7)	(6,218.7)	[1]
Inter-company financing	0	0	[1]
Net cash flows used in financing activities	(3,631.7)	(6,218.7)	[1],[2]
Decrease in cash and cash equivalents	(3,720.3)	1,082.2	[1],[2]
Unrestricted cash and cash equivalents, beginning of period	8,650.2	8,405.2	[1],[2]
Unrestricted cash and cash equivalents, end of period	4,929.9	9,487.4	[1],[2]
CIT Group Inc [Member]
Net cash flows provided by (used for) operations	(1,086.2)	(159.6)	[1]
Net decrease in financing and leasing assets and other investing activities	(1,406.4)	459.4	[1]
(Increase) decrease in inter-company loans and investments	2,688.1	893.4	[1]
Net cash flows (used in) provided by investing activities	1,281.7	1,352.8	[1]
Net increase (decrease) in debt and other financing activities	(1,502.2)	(227.1)	[1]
Inter-company financing	0	0	[1]
Net cash flows used in financing activities	(1,502.2)	(227.1)	[1]
Decrease in cash and cash equivalents	(1,306.7)	966.1	[1]
Unrestricted cash and cash equivalents, beginning of period	2,703.6	609.3	[1]
Unrestricted cash and cash equivalents, end of period	1,396.9	1,575.4	[1]
Guarantor Entities [Member]
Net cash flows provided by (used for) operations	424.4	(282.6)	[1]
Net decrease in financing and leasing assets and other investing activities	(331.8)	2,879.4	[1]
(Increase) decrease in inter-company loans and investments	0	0	[1]
Net cash flows (used in) provided by investing activities	(331.8)	2,879.4	[1]
Net increase (decrease) in debt and other financing activities	21.9	(3,128.0)	[1]
Inter-company financing	(2,914.6)	726.7	[1]
Net cash flows used in financing activities	(2,892.7)	(2,401.3)	[1]
Decrease in cash and cash equivalents	(2,800.1)	195.5	[1]
Unrestricted cash and cash equivalents, beginning of period	2,946.4	4,420.6	[1]
Unrestricted cash and cash equivalents, end of period	146.3	4,616.1	[1]
Pledged Entities [Member]
Net cash flows provided by (used for) operations	275.5	59.7	[1]
Net decrease in financing and leasing assets and other investing activities	420.3	755.4	[1]
(Increase) decrease in inter-company loans and investments	0	0	[1]
Net cash flows (used in) provided by investing activities	420.3	755.4	[1]
Net increase (decrease) in debt and other financing activities	(701.4)	(210.5)	[1]
Inter-company financing	539.1	(972.9)	[1]
Net cash flows used in financing activities	(162.3)	(1,183.4)	[1]
Decrease in cash and cash equivalents	533.5	(368.3)	[1]
Unrestricted cash and cash equivalents, beginning of period	1,021.1	808.1	[1]
Unrestricted cash and cash equivalents, end of period	1,554.6	439.8	[1]
Other Non Guarantor Entities [Member]
Net cash flows provided by (used for) operations	641.9	560.6	[1]
Net decrease in financing and leasing assets and other investing activities	973.7	3,028.6	[1]
(Increase) decrease in inter-company loans and investments	0	0	[1]
Net cash flows (used in) provided by investing activities	973.7	3,028.6	[1]
Net increase (decrease) in debt and other financing activities	(1,450.0)	(2,653.1)	[1]
Inter-company financing	(312.6)	(647.2)	[1]
Net cash flows used in financing activities	(1,762.6)	(3,300.3)	[1]
Decrease in cash and cash equivalents	(147.0)	288.9	[1]
Unrestricted cash and cash equivalents, beginning of period	1,979.1	2,567.2	[1]
Unrestricted cash and cash equivalents, end of period	1,832.1	2,856.1	[1]
Guarantor And Non Guarantor Entities Eliminations [Member]
Net cash flows provided by (used for) operations	0	0	[1]
Net decrease in financing and leasing assets and other investing activities	0	0	[1]
(Increase) decrease in inter-company loans and investments	(2,688.1)	(893.4)	[1]
Net cash flows (used in) provided by investing activities	(2,688.1)	(893.4)	[1]
Net increase (decrease) in debt and other financing activities	0	0	[1]
Inter-company financing	2,688.1	893.4	[1]
Net cash flows used in financing activities	2,688.1	893.4	[1]
Decrease in cash and cash equivalents	0	0	[1]
Unrestricted cash and cash equivalents, beginning of period	0	0	[1]
Unrestricted cash and cash equivalents, end of period	$ 0	$ 0	[1]

[1] 2010 data has been conformed to the current quarter presentation.

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