Pension and Other Postretirement Benefits (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended		3 Months Ended		9 Months Ended
	Sep. 28, 2013		Sep. 28, 2013		Dec. 29, 2012	Sep. 28, 2013 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member]	Sep. 29, 2012 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member]	Sep. 28, 2013 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member]	Sep. 29, 2012 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member]	Sep. 28, 2013 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member] Defined Benefit Plans	Sep. 29, 2012 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member] Defined Benefit Plans	Sep. 28, 2013 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member] Defined Benefit Plans	Sep. 29, 2012 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member] Defined Benefit Plans	Sep. 28, 2013 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member] Other Postretirement Benefits	Sep. 29, 2012 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member] Other Postretirement Benefits	Sep. 28, 2013 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member] Other Postretirement Benefits	Sep. 29, 2012 Defined Benefit Plans and Other Postretirement Benefit, Cost [Member] Other Postretirement Benefits
Pension and other post-retirement benefits details:
Pension and other postretirement defined benefit plans, noncurrent liabilities	$ 752.7		$ 752.7		$ 833.0
Net periodic pension costs under retirement plans and other postretirement benefits:
Service cost - benefits earned during the period						4.7	4.9	14.5	14.7	3.9	4.2	11.9	12.6	0.8	0.7	2.6	2.1
Interest cost on projected benefit obligation						40.4	43.3	122.2	129.7	38.7	41.3	116.9	123.8	1.7	2.0	5.3	5.9
Expected return on plan assets						(44.0)	(43.6)	(132.7)	(130.8)	(44.0)	(43.6)	(132.7)	(130.8)	0	0	0	0
Amortization of prior service cost (benefit)						(0.7)	(0.7)	(2.1)	(2.1)	0.2	0.2	0.6	0.6	(0.9)	(0.9)	(2.7)	(2.7)
Amortization of net actuarial loss (gain)	14.0	[1]	42.2	[1]		14.0	9.7	42.2	29.1	14.0	9.8	42.4	29.4	0	(0.1)	(0.2)	(0.3)
Less: expected participant contributions						(0.3)	(0.4)	(0.9)	(1.2)	(0.3)	(0.4)	(0.9)	(1.2)	0	0	0	0
Net periodic pension and postretirement benefit cost						14.1	13.2	43.2	39.4	12.5	11.5	38.2	34.4	1.6	1.7	5.0	5.0
Contributions paid to defined benefit plans			68.9
Expected total defined benefit plan employer contributions	$ 110		$ 110

[1] These components of AOCI are included in the computation of net periodic pension and other postretirement benefit cost. See Note 15, "Pension and Other Postretirement Benefits" for additional details.