Debt (Schedule of Long-term Debt including Capital Lease Obligation) (Details) - USD ($) $ in Millions	Dec. 25, 2015	Sep. 25, 2015
Current maturities of long-term debt:
Long term debt, current maturities	$ 21.9	$ 22.3
Capital Lease Obligations, Current	0.9	1.3
Long-term debt:
Unamortized Debt Issuance Expense and Discount	105.0	109.9
Long-term Debt	6,536.5	6,606.5
Long-term Debt, Gross	6,514.6	6,584.2
Capital lease obligation and vendor financing agreements	0.8	1.0
Receivable Securitization
Long-term debt:
Unamortized Debt Issuance Expense and Discount	0.8	0.8
Secured Debt | Term Loan and New Term Loan
Current maturities of long-term debt:
Long term debt, current maturities	20.0	20.0
Long-term debt:
Unamortized Debt Issuance Expense and Discount	42.0	44.1
Long-term Debt	1,973.5
Long-term Debt, Gross	1,953.5	1,958.5
Secured Debt | 4.00% Term Loan
Current maturities of long-term debt:
Long term debt, current maturities	1.0	1.0
Long-term debt:
Unamortized Debt Issuance Expense and Discount	0.0	0.0
Long-term Debt, Gross	6.5	6.9
Senior Notes | 3.50% Senior Notes
Long-term debt:
Unamortized Debt Issuance Expense and Discount	1.6	1.7
Senior Notes | 2020 Notes
Long-term debt:
Unamortized Debt Issuance Expense and Discount	10.7	11.3
Senior Notes | 5.75% Senior Notes
Long-term debt:
Unamortized Debt Issuance Expense and Discount	13.6	14.4
Senior Notes | 4.75% Senior Notes
Long-term debt:
Unamortized Debt Issuance Expense and Discount	6.9	7.1
Senior Notes | Five Point Six Two Five Percent Note [Member]
Long-term debt:
Unamortized Debt Issuance Expense and Discount	13.1	13.7
Senior Notes | 2025 Notes
Long-term debt:
Unamortized Debt Issuance Expense and Discount	11.6	11.9
Debentures | 9.50% Debenture
Long-term debt:
Unamortized Debt Issuance Expense and Discount	0.0	0.0
Debentures | 8.00% Debenture
Long-term debt:
Unamortized Debt Issuance Expense and Discount	0.0	0.0
2015 Revolving Credit Facility [Member]
Long-term debt:
Unamortized Debt Issuance Expense and Discount	4.7	4.9
Capital Lease Obligations [Member]
Long-term debt:
Unamortized Debt Issuance Expense and Discount	$ 0.0	$ 0.0