Retirement Plans (Schedule of Net Periodic Benefit Cost) (Details) - Pension Plan [Member] - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2016	Dec. 25, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0.2	$ 0.4
Interest cost	0.5	3.5
Expected return on plan assets	(0.6)	(4.2)
Amortization of net actuarial loss	1.0	2.6
Plan Settlements	45.0	0.0
Net periodic benefit cost	$ 46.1	$ 2.3