Retirement Plans (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2016	Dec. 25, 2015
Postretirement Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit credit	$ 0.0
Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Net periodic benefit credit	46.1	$ 2.3
Defined Benefit Plan, Purchases, Sales, and Settlements	125.5
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	$ (45.0)	$ 0.0