Components of Deferred Tax Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Deferred Tax Assets, Net [Abstract]
Postretirement/post-employment benefits	$ 42.4	$ 34.5
Deferred compensation	205.2	192.3
Pension costs	14.2	23.9
Basis differences in fixed assets	81.8	83.0
Rent	38.6	15.2
Interest	54.8	51.1
Accruals and reserves	55.6	42.0
Allowance for doubtful accounts	8.1	10.6
Basis differences in intangible assets	(330.1)	(263.3)
Investments in equity securities	30.8	5.3
Tax loss/tax credit carry forwards	478.1	621.5
Restructuring and other reorganization-related costs	2.0	2.7
Other	92.2	55.6
Total Deferred Tax Assets, Net	773.7	874.4
Valuation allowance	(489.9)	(508.1)
Net Deferred Tax Assets	$ 283.8	$ 366.3