Quarterly report pursuant to Section 13 or 15(d)

Unsecured Lines Of Credit Payable (Repayments And Borrowings On Unsecured Lines Of Credit) (Details)

v2.3.0.15
Unsecured Lines Of Credit Payable (Repayments And Borrowings On Unsecured Lines Of Credit) (Details) (USD $)
In Millions
9 Months Ended
Sep. 30, 2011
Jun. 30, 2011
Credit Facility No. 1 [Member]
   
Line of Credit Facility [Line Items]    
Balance at June 30, 2011   $ 74.0
Balance at September 30, 2011 74.0 74.0
Credit Facility No. 2 [Member]
   
Line of Credit Facility [Line Items]    
Balance at June 30, 2011   171.0
Borrowings 58.0  
Repayments (110.0)  
Balance at September 30, 2011 $ 119.0 $ 171.0