XML 85 R54.htm IDEA: XBRL DOCUMENT v2.4.0.8
Fair Value Disclosures (Fair Value Of Notes Receivable And Notes Payable) (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Carrying Value $ 2,523.8 $ 2,510.5
Fixed Rate Notes Payable [Member]
   
Carrying Value 2,270.8 2,297.8
Estimated Fair Value 2,361.6 2,518.1
Floating Rate Notes Payable [Member]
   
Carrying Value 253.0 212.7
Estimated Fair Value $ 243.0 $ 203.4