Employee Benefit Plans, Pensions, and Other Retiree Benefits (401(k) Plan) (Details) - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2016	Oct. 02, 2015	Oct. 03, 2014
Compensation and Retirement Disclosure [Abstract]
Minimum age requirement		21 years
Contribution percentage of employee earnings to retirement plan		4.00%
Contribution of common shares to savings and retirement plan (in shares)	0.0	0.1	0.2
Contribution of common shares to savings and retirement plan	$ 2.8	$ 7.2	$ 6.2