Taxes on Income (Significant Components of the Company's Net Deferred Tax Liability) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Jan. 01, 2011
Income Tax Disclosure [Abstract]
Deferred tax assets, pension liability	$ 295.3	$ 244.1
Deferred tax assets, workers' compensation and other claims	189.2	187.7
Deferred tax assets, employee benefits	205.5	175.0
Deferred tax assets, accrued claims and other liabilities	91.5	74.1
Deferred tax assets, reserves not currently deductible	36.7	43.7
Deferred tax assets, foreign tax credit carryforwards	35.3	0
Deferred tax assets, state tax credit carryforwards	20.7	17.8
Deferred tax assets, operating loss carryforwards	2.0	2.3
Deferred tax assets, other assets	14.2	21.7
Deferred Tax Assets, Gross	890.4	766.4
Valuation allowance	(29.1)	0
Deferred tax assets, total	861.3	766.4
Deferred tax liabilities, property	663.8	649.5
Deferred tax liabilities, inventory	312.9	306.5
Deferred tax liabilities, investments in foreign operations	9.5	60.2
Deferred tax liabilities, total	986.2	1,016.2
Net deferred tax liability	$ 124.9	$ 249.8