Consolidated Statements of Comprehensive Income (Loss) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Statement of Comprehensive Income [Abstract]
Net income (loss)	$ 11.3	$ (11.0)	$ (10.8)	$ (58.9)
Changes in foreign currency translation adjustment	3.3	(2.9)	(3.7)	(9.3)
Changes in unrealized holding gains on available-for-sale securities	4.2	0.1	1.9	2.3
Changes in pension plans, net of taxes of $0.2 for the nine months ended June 28, 2014	0	0	(0.6)	0
Other comprehensive income (loss)	7.5	(2.8)	(2.4)	(7.0)
Comprehensive income (loss)	$ 18.8	$ (13.8)	$ (13.2)	$ (65.9)