Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Jan. 01, 2011	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Commitments And Contingencies [Line Items]
Operating leases expiring date		2023
Lease expense, net of sublease income		$ 37.8	$ 35.7	$ 37.5
Additional term of lease renewal	10 years
Landlord reimbursements		12.8
Letters of credit and bank guarantees outstanding		3.7	3.8
Bank guarantees outstanding collateralized		1.2	1.1
CHINA | Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Minimum [Member]
Commitments And Contingencies [Line Items]
Revenue from China as a percent of total revenue		6.00%
CHINA | Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Maximum [Member]
Commitments And Contingencies [Line Items]
Revenue from China as a percent of total revenue		7.00%
Pending or Threatened Litigation [Member]
Commitments And Contingencies [Line Items]
Loss contingency accrual		$ 0.5