Postretirement Plans (Summary Of Components Of Net Periodic Benefit Costs And Other Amounts Recognized In Other Comprehensive Income (Loss)) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011	Jan. 02, 2010
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 19.1	$ 16.5	$ 16.5
Interest cost	53.9	54.2	53.8
Expected return on plan assets	(58.7)	(57.9)	(60.4)
Amortization of prior service credit	1.1	1.2	1.3
Net periodic benefit cost	46.5	34.3	18.0
Prior service cost	(0.2)	(1.4)	(0.4)
Net loss (gain)	61.1	13.5	26.3
Total recognized in OCI	60.9	12.1	25.9
U.S. Postretirement Health Care Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.2	0.2	0.2
Interest cost	3.3	3.9	4.8
Expected return on plan assets	(1.0)	(0.9)	(0.7)
Amortization of prior service credit		(0.4)	(0.4)
Net periodic benefit cost	2.5	2.8	3.9
Prior service cost		0.2	0.3
Net loss (gain)	(3.0)	1.5	5.8
Total recognized in OCI	$ (3.0)	$ 1.7	$ 6.1