Components of Deferred Tax Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets, Net [Abstract]
Postretirement/post-employment benefits	$ 40.4	$ 42.4
Deferred compensation	192.4	205.2
Pension costs	27.0	14.2
Basis differences in fixed assets	26.9	81.8
Rent	50.2	38.6
Interest	66.9	54.8
Accruals and reserves	51.1	55.6
Allowance for doubtful accounts	9.2	8.1
Basis differences in intangible assets	(364.9)	(330.1)
Investments in equity securities	(5.2)	30.8
Tax loss/tax credit carry forwards	449.7	478.1
Restructuring and other reorganization-related costs	1.2	2.0
Other	88.3	92.2
Total Deferred Tax Assets, Net	633.2	773.7
Valuation allowance	(392.9)	(489.9)
Net Deferred Tax Assets	$ 240.3	$ 283.8