(Schedule of Carrying Amount and Fair Value of Long-term Debt) (Details) (USD $) In Millions, unless otherwise specified	Sep. 26, 2014	Sep. 27, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable rate receivable securitization	$ 150.0
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	0	0.1
Variable rate receivable securitization	150.0	0
Carrying Value | 2.85% term loan due April 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	3.1	0
Carrying Value | Term loan due March 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	1,990.3	0
Carrying Value | 4.00% term loan due February 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	10.8	0
Carrying Value | Debentures | 9.50% debentures due May 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	10.4	10.4
Carrying Value | Debentures | 8.00% debentures due March 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	8.0	8.0
Carrying Value | Senior Notes | 3.50% notes due April 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	300.0	299.9
Carrying Value | Senior Notes | 5.75% notes due August 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	900.0
Carrying Value | Senior Notes | 4.75% notes due April 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	598.3	598.2
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	0	0.1
Variable rate receivable securitization	150.0	0
Fair Value | 2.85% term loan due April 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	3.1	0
Fair Value | Term loan due March 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	1,970.4	0
Fair Value | 4.00% term loan due February 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	10.8	0
Fair Value | Debentures | 9.50% debentures due May 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	14.2	14.3
Fair Value | Debentures | 8.00% debentures due March 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	10.2	10.2
Fair Value | Senior Notes | 3.50% notes due April 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	290.2	293.7
Fair Value | Senior Notes | 5.75% notes due August 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	907.3
Fair Value | Senior Notes | 4.75% notes due April 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	$ 563.8	$ 568.5