Commitments And Contingencies (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended			60 Months Ended
	Jan. 01, 2011	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015
Commitments And Contingencies [Line Items]
Lease expense, net of sublease income		$ 37.2	$ 36.9	$ 38.6
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		$ 4.2	4.0		$ 4.0
Bank guarantees outstanding collateralized		1.2	1.1		1.1
Pending or Threatened Litigation [Member]
Commitments And Contingencies [Line Items]
Loss contingency accrual		$ 3.6	30.5		$ 30.5
Korea
Commitments And Contingencies [Line Items]
Income Tax Examination, Description		12			12
China Matter [Member]
Commitments And Contingencies [Line Items]
Loss contingency accrual			$ 28.2		$ 28.2