Long-Term Borrowings (Schedule Of Secured Borrowings And Pledged Assets) (Details) (USD $) In Millions	Jun. 30, 2011		Dec. 31, 2010
Secured Borrowings	$ 9,858.8		$ 10,965.8
Assets Pledged	14,524.6		15,418.4
Education Trusts and Conduits (Student Loans) [Member]
Secured Borrowings	4,006.8		4,184.4
Assets Pledged	5,318.0		5,558.8
GSI Facility Borrowings [Member]
Secured Borrowings	1,067.8	[1]	1,624.6	[1]
Assets Pledged	1,755.1	[1]	2,349.5	[1]
Trade Finance [Member]
Secured Borrowings	382.1		504.9
Assets Pledged	1,550.5		1,479.6
Corporate Finance (SBL) [Member]
Secured Borrowings	271.9		258.0
Assets Pledged	297.2		283.6
Other Equipment Secured Facilities [Member]
Secured Borrowings	1,952.3	[2]	2,235.0	[2]
Assets Pledged	2,501.3	[2]	2,704.4	[2]
Subtotal - Finance Receivables [Member]
Secured Borrowings	7,680.9		8,806.9
Assets Pledged	11,422.1		12,375.9
Transportation Finance - Aircraft [Member]
Secured Borrowings	1,413.8	[3]	1,315.1	[3]
Assets Pledged	1,646.6	[3]	1,531.0	[3]
Transportation Finance - Rail [Member]
Secured Borrowings	146.6		148.9
Assets Pledged	143.1		146.2
GSI Facility Borrowings (Aircraft) [Member]
Secured Borrowings	488.2		519.8
Assets Pledged	1,106.8		1,119.3
Other Structures [Member]
Secured Borrowings	77.9		99.8
Assets Pledged	100.7		126.2
Subtotal - Equipment Under Operating Leases [Member]
Secured Borrowings	2,126.5		2,083.6
Assets Pledged	2,997.2		2,922.7
FHLB Borrowings (Consumer) [Member]
Secured Borrowings	51.4	[4]	75.3	[4]
Assets Pledged	105.3	[4]	119.8	[4]
Corporate Finance [Member]
Assets Pledged	1,000.0
Student Loans [Member]
Assets Pledged	600.0
Small Business Lending [Member]
Assets Pledged	100.0
Assets Held-for-sale [Member]
Assets Pledged	$ 102.6

[1] At June 30, 2011 borrowings are secured by $1.0 billion of corporate finance receivables, $0.6 billion of student loans and $0.1 billion of small business lending loans, of which $102.6 million were classified as Assets Held for sale at June 30, 2011.

[2] Includes facilities secured by equipment primarily in Vendor Finance and Corporate Finance and the associated secured debt.

[3] Secured financing facilities for the purchase of aircraft.

[4] Collateralized with Government Debentures and Certificates of Deposit.