Schedule of Funded Status of the Defined Benefit Pension and Post-Retirement Benefit Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012	Aug. 27, 2013
Change in plan assets:
Plan assets - end of fiscal year	$ 188.6	$ 180.8
Defined Benefit Plans
Change in benefit obligation:
Benefit obligation - beginning of fiscal year	195.7	181.1
Service cost	4.1	4.8	4.3
Interest cost	6.1	5.2	5.3
Plan participants’ contributions	7.8	10.9
Plan amendment		0.5
Plan settlement	(7.8)	(4.7)
Actuarial (gain) loss	14.2	(0.7)
Foreign currency changes	(7.7)	3.2
Benefit and expense payments	(4.8)	(4.6)
Benefit obligation - end of fiscal year	207.6	195.7	181.1
Change in plan assets:
Plan assets - beginning of fiscal year	180.8	142.6
Employer contributions	7.2	22.2
Actual return on plan assets	11.8	11.6
Plan participants’ contributions	7.8	10.9
Plan settlement	(7.8)	(4.7)
Foreign currency changes	(6.4)	2.8
Benefit and expense payments	(4.8)	(4.6)
Plan assets - end of fiscal year	188.6	180.8	142.6
Funded status	(19.0)	(14.9)
Long-term assets	5.3	3.1
Long-term liabilities	(24.3)	(18.0)
Net amount recognized	(19.0)	(14.9)
Post-Retirement Benefit Plans
Change in benefit obligation:
Benefit obligation - beginning of fiscal year	4.8	5.6		4.8
Interest cost	0.2	0.2	0.2
Plan amendment	(3.3)
Actuarial (gain) loss	0.2	(0.5)
Benefit and expense payments	(0.5)	(0.5)
Benefit obligation - end of fiscal year	1.4	4.8	5.6	4.8
Change in plan assets:
Employer contributions	0.5	0.5
Benefit and expense payments	(0.5)	(0.5)
Funded status	(1.4)	(4.8)
Current liabilities	(0.3)	(0.5)
Long-term liabilities	(1.1)	(4.3)
Net amount recognized	$ (1.4)	$ (4.8)