Accumulated Other Comprehensive Income (Schedule of Reclassifications out of Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 26, 2015		Jun. 27, 2014	Jun. 26, 2015		Jun. 27, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total reclassifications for the period				$ 5.5		$ 1.7
Other Comprehensive Income (Loss), Net of Tax				(48.0)		2.0
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		$ 0.0	(0.1)		(0.1)
Amortization of unrealized gain on derivatives, net of tax	0.2		0.2	0.4		0.4
Amortization of pension and post-retirement plans, net actuarial loss	2.4	[1]	2.2	7.1	[1]	6.4
Amortization of pension and post-retirement plans, prior service cost	(1.2)	[1]	(2.5)	(3.5)	[1]	(7.4)
Amortization of pension and post-retirement plans, plan settlements	3.4		2.6	4.6		2.9
Amortization of pension and post-retirement plans, before tax	4.6		2.3	8.2		1.9
Amortization of pension and post-retirement plans, tax	(1.7)		(0.7)	(3.1)		(0.6)
Amortization of pension and post-retirement plans, net of tax	2.9		1.6	5.1		1.3
Total reclassifications for the period	3.1		1.8	5.5		1.7
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	$ 0.2		$ 0.2	$ 0.5		$ 0.5

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