Pension and Other Postretirement Pension Plans (Narrative) (Details) - USD ($) $ in Millions		12 Months Ended
	Jun. 30, 2016	Sep. 29, 2017
Defined Benefit Plan Disclosure [Line Items]
Decrease of plan benefit obligation	$ 356.2
Decrease of plan assets	$ 229.0
Total Other Non-current Assets
Defined Benefit Plan Disclosure [Line Items]
Restricted investments		$ 7.7
Employee loans receivable		2.2
SG&A Expense
Defined Benefit Plan Disclosure [Line Items]
One-time, non-cash benefit		$ 9.9
U.S. Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Period of annual average returns used in return on plan assets simulation model (in years)		20 years