Schedule II - Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 26, 2014	Sep. 27, 2013	Sep. 28, 2012
Allowance for doubtful accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	$ 4.6	$ 9.4	$ 5.7
Charged to Income	2.3	1.4	4.5
Additions and Other	0	0	0
Deductions	(0.3)	(6.2)	(0.8)
Balance at End of Period	6.6	4.6	9.4
Sales reserve accounts
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	322.9	279.8	271.2
Charged to Income	1,846.8	1,316.9	1,157.8
Additions and Other	30.6	0	0
Deductions	(1,769.8)	(1,273.8)	(1,149.2)
Balance at End of Period	430.5	322.9	279.8
Tax valuation allowance
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Period	30.0	15.3	15.6
Charged to Income	33.4	11.7	(0.3)
Additions and Other	14.1	3.0	0
Deductions	0	0	0
Balance at End of Period	$ 77.5	$ 30.0	$ 15.3