Commitments And Contingencies (Details) (USD $) In Millions, unless otherwise specified	0 Months Ended						1 Months Ended	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 16, 2011	Sep. 09, 2011	Apr. 22, 2011	Dec. 03, 2010	Apr. 19, 2011	Dec. 20, 2010	Oct. 31, 2010	Sep. 30, 2011	Mar. 31, 2011	Sep. 30, 2011	Dec. 31, 2010	Aug. 12, 2011	Jul. 25, 2011	Jun. 15, 2011	Jun. 03, 2011	Sep. 27, 2007
Loss Contingencies [Line Items]
Accrual for legal fees and settlements								$ 15.9		$ 15.9	$ 43.5
Initial settlement payment made							40.8
Number of student plaintiffs						3										36
Pretax charge of estimated loss											40.8
Disbursement by terms of agreement									40.0
Number of students in class		60	2,600	2,300	60
Number of claims against student lenders										15
Number of opt-out Individuals								167		167		5	42	31	115
Opt-out period expiration date			June 20, 2011							June 6, 2011
Minimum placement rate per accreditor										65.00%
Number of schools meeting placement rate requirement										13
Number of schools reviewed										49
Additional number of students joining litigation	19					11
Administrative expense for an estimate for potential reimbursements of government funds								5.0
Other accrued liability for certain legal or regulatory matters										5
Kelly [Member]
Loss Contingencies [Line Items]
Estimated loss related to litigation settlement										$ 0.2