Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements (Details 2)

v2.3.0.15
Fair Value Measurements (Details 2) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Sep. 30, 2010
Auction Rate Securities.
Sep. 30, 2010
Put right.
Sep. 30, 2011
Forethought Note
Sep. 30, 2010
Forethought Note
Sep. 30, 2011
Equity Investments
Sep. 30, 2009
Equity Investments
Reconciliation of changes in Level 3 financial assets            
Balance at the beginning of the period $ 47.2 $ 1.7 $ 127.0 $ 109.0 $ 3.0 $ 3.0
Total realized and unrealized gains or (losses):            
Included in earnings, net (1.4) (1.7)        
Included in other comprehensive income 1.5          
Change in fair value, disclosure only     24.2 28.0    
Purchases, issuances and settlements (35.4)   (151.2) (10.0)    
Transfers in and/or (out) of Level 3 (11.9)       (2.0)  
Balance at the end of the period       127.0 1.0 3.0
Yield to maturity (as a percent)       14.00%    
Estimated amount by which the fair value of the note and accrued interest is below its carrying value       17.8    
Forethought note principal and interest repayment     $ 151.2