Income Tax (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 28, 2012	Dec. 30, 2011
Income Tax Disclosure [Abstract]
Effective tax rate	25.46%	28.90%
Unrecognized tax benefits, gross	$ 16.4
Unrecognized tax benefits if recognized, would affect our effective tax rate	11.1
Licensing revenue withholding tax remittances	$ 9.4	$ 11.3