Consolidated Statements of Comprehensive Income (Loss) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Mar. 28, 2015
Mar. 29, 2014
Mar. 28, 2015
Mar. 29, 2014
Statement of Comprehensive Income [Abstract]        
Net income (loss) $ 47.8 $ (16.8) $ 77.0 $ (22.1)
Changes in foreign currency translation adjustment (9.5) (5.8) (18.5) (7.0)
Changes in unrealized holding gains and losses on available-for-sale securities (8.3) (1.0) (3.2) (2.2)
Changes in pension plans, net of taxes of $0.2 in fiscal 2014 0 0 0.1 (0.6)
Derivative Instruments, Gain (Loss) Recognized in Other Comprehensive Income (Loss), Effective Portion, Net (1.6) 0 (1.6) 0
Other comprehensive loss (19.4) (6.8) (23.2) (9.8)
Comprehensive income (loss) $ 28.4 $ (23.6) $ 53.8 $ (31.9)