Retirement Plans (Schedule of Net Periodic Benefit Cost) (Details) - Pension Benefits - USD ($) $ in Millions	3 Months Ended
	Dec. 25, 2015	Dec. 26, 2014
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.0	$ 1.2
Interest cost	4.2	4.5
Expected return on plan assets	(5.1)	(5.8)
Amortization of net actuarial loss	2.6	2.3
Amortization of prior service (credit)	(0.1)	(0.2)
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	0.0	0.0
Net periodic benefit cost	$ 2.6	$ 2.0