Retirement Plans (Schedule of Net Periodic Benefit Cost) (Details) - Pension Benefits - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 25, 2016	Mar. 27, 2015	Mar. 25, 2016	Mar. 27, 2015
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.0	$ 1.2	$ 2.0	$ 2.4
Interest cost	4.2	4.4	8.4	8.9
Expected return on plan assets	(5.1)	(5.7)	(10.2)	(11.5)
Amortization of net actuarial loss	2.6	2.4	5.2	4.7
Amortization of prior service (credit)	(0.1)	(0.2)	(0.2)	(0.4)
Plan Settlements	3.7	1.2	3.7	1.2
Net periodic benefit cost	$ 6.3	$ 3.3	$ 8.9	$ 5.3