Employee Benefit Plans and Collective Bargaining Agreements (Components of Net Pension Expense and Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Income) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 29, 2012	Dec. 31, 2011	Jan. 01, 2011
Components of net pension expense:
Amortization of net actuarial loss	$ (95.0)
Pension [Member]
Components of net pension expense:
Estimated return on plan assets	(123.8)	(139.5)	(124.5)
Service cost	42.5	39.6	36.1
Interest cost	113.9	122.9	125.8
Settlement loss	5.9	1.1	0
Curtailment gain	1.8	0	0
Amortization of prior service cost (credit)	13.9	15.8	17.3
Amortization of net actuarial loss	87.6	64.3	58.6
Net Expense	141.8	104.2	113.3
Changes in plan assets and benefit obligations recognized in other comprehensive income:
Net actuarial loss (gain)	122.6	325.4	49.7
Amortization of net actuarial loss	(93.6)	(65.4)	(58.6)
Prior service credit	0.5	1.0	0
Amortization of prior service (cost) credit	(15.5)	(15.8)	(17.3)
Total recognized in other comprehensive income	14.0	245.2	(26.2)
Total net expense and changes in plan assets and benefit obligations recognized in other comprehensive income	155.8	349.4	87.1
Other Post-Retirement Benefits [Member]
Components of net pension expense:
Estimated return on plan assets	0	0	0
Service cost	2.5	2.4	2.3
Interest cost	5.6	6.8	7.2
Settlement loss	0	0	0
Curtailment gain	0	0	0
Amortization of prior service cost (credit)	(0.3)	(0.2)	(0.1)
Amortization of net actuarial loss	1.2	1.1	2.5
Net Expense	9.0	10.1	11.9
Changes in plan assets and benefit obligations recognized in other comprehensive income:
Net actuarial loss (gain)	2.1	(0.5)	6.7
Amortization of net actuarial loss	(1.2)	(1.1)	(2.5)
Prior service credit	0	(2.3)	0
Amortization of prior service (cost) credit	0.3	0.3	0.1
Total recognized in other comprehensive income	1.2	(3.6)	4.3
Total net expense and changes in plan assets and benefit obligations recognized in other comprehensive income	$ 10.2	$ 6.5	$ 16.2