Fair Value Measurements (Narrative) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Sep. 30, 2011
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability related to purchase of shares from noncontrolling interests	$ 10.6	$ 51.0
CryoService Limited [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Liability related to purchase of shares from noncontrolling interests		$ 51.0
Agreements to purchase the remaining shares		25.00%