Commitments And Contingencies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Jan. 01, 2011	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Commitments And Contingencies [Line Items]
Lease expense, net of sublease income		$ 38.6	$ 38.4	$ 37.8
Lease renewal term	10 years
Annual base rent plus operating expenses		7.4
Additional term of lease renewal		10 years
Landlord reimbursements		12.8
Letters of credit and bank guarantees outstanding		3.6	3.9
Bank guarantees outstanding collateralized		0.9	1.0
Ceiling percentage of revenue for major customer		10.00%
CHINA | Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Minimum [Member]
Commitments And Contingencies [Line Items]
Ceiling percentage of revenue for major customer		5.00%
CHINA | Geographic Concentration Risk [Member] | Sales Revenue, Services, Net [Member] | Maximum [Member]
Commitments And Contingencies [Line Items]
Ceiling percentage of revenue for major customer		7.00%
Pending or Threatened Litigation [Member]
Commitments And Contingencies [Line Items]
Loss contingency accrual		$ 4.7