(Schedule of Carrying Amount and Fair Value of Long-term Debt) (Details) - USD ($) $ in Millions	Dec. 29, 2017	Dec. 30, 2016
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	$ 6,492.6	$ 5,965.8
Term loan due March 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	0.0	1,953.2
Loans Payable	0.0	1,948.5
4.00% term loan due February 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	0.0	6.5
Loans Payable	0.0	6.5
Secured Debt | Variable rate receivable securitization
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable rate receivable securitization	0.0
Secured Debt | Receivable securitization, Maturity Date of July 2020 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable rate receivable securitization		0.0
Long-term Debt, Gross	200.0	0.0
Secured Debt | Term loan due March 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	0.0	1,928.5
Secured Debt | 4.00% term loan due February 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Gross	0.0	5.5
Secured Debt | New Term Loan
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Loan payable	1,848.7	0.0
Loans Payable	1,851.2	0.0
Debentures | 9.50% debentures due May 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	10.9	12.0
Long-term Debt, Gross	10.4	10.4
Debentures | 8.00% debentures due March 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	4.4	4.9
Long-term Debt, Gross	4.4	4.4
Senior Notes | 3.50% notes due April 2018
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	299.1	298.7
Long-term Debt, Gross	0.0	300.0
Senior Notes | 5.75% notes due August 2022
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	804.8	850.3
Long-term Debt, Gross	884.0	884.0
Senior Notes | 4.75% notes due April 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	412.4	520.9
Long-term Debt, Gross	526.5	600.0
Debentures | Four Point Eight Eight Percent Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	675.2	699.5
Long-term Debt, Gross	700.0	700.0
Debentures | Five Point Five Percent Notes [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	564.5	615.7
Long-term Debt, Gross	692.1	695.0
Debentures | 2015 Revolving Credit Facility
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	900.0	100.0
Long-term Debt, Gross	900.0	100.0
Debentures | 5.625% notes due October 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long term debt	628.8	682.4
Long-term Debt, Gross	738.0	738.0
Carrying Value | Variable rate receivable securitization
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable rate receivable securitization		250.0
Fair Value | Variable rate receivable securitization
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable rate receivable securitization	0.0	250.0
Fair Value | Receivable securitization, Maturity Date of July 2020 [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Variable rate receivable securitization	$ 200.0	$ 0.0