Accumulated Other Comprehensive Income (Schedule of Reclassifications out of Accumulated Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 26, 2014		Dec. 27, 2013
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period	$ 0.8		$ (0.2)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrealized gain on derivatives, tax	0		(0.1)
Amortization of unrealized gain on derivatives, net of tax	0.1		0.1
Amortization of pension and post-retirement plans, net actuarial loss	2.3	[1]	2.1	[1]
Amortization of pension and post-retirement plans, prior service cost	(1.1)	[1]	(2.5)	[1]
Amortization of pension and post-retirement plans, before tax	1.2		(0.4)
Amortization of pension and post-retirement plans, tax	(0.5)		0.1
Amortization of pension and post-retirement plans, net of tax	0.7		(0.3)
Total reclassifications for the period	0.8		(0.2)
Reclassification out of Accumulated Other Comprehensive Income | Interest Expense
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Amortization of unrealized gain on derivatives, before tax	$ 0.1		$ 0.2

[1] These accumulated other comprehensive income components are included in the computation of net periodic benefit cost. See Note 12 for additional details.