Basis of Presentation (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended			9 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Dec. 30, 2016	Jun. 30, 2017
Miscellaneous Other Non-current Assets
Basis Of Presentation [Line Items]
Restricted investments		$ 7.7
Employee loans receivable		2.2
Selling, General and Administrative Expense
Basis Of Presentation [Line Items]
One-time, non-cash benefit		$ 9.9
Goodwill Adjustment
Basis Of Presentation [Line Items]
Adjustment of financial statements line item			$ 209.9
Accumulated Other Comprehensive Income Adjustment
Basis Of Presentation [Line Items]
Adjustment of financial statements line item			209.9
Overall Translation Adjustment
Basis Of Presentation [Line Items]
Adjustment of financial statements line item			$ 287.5
Other Comprehensive Income Adjustment
Basis Of Presentation [Line Items]
Adjustment of financial statements line item	$ 39.6			$ 41.9