Components of Deferred Tax Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Deferred Tax Assets, Net [Abstract]
Postretirement/post-employment benefits	$ 27.4	$ 32.5
Deferred compensation	191.2	187.2
Pension costs	41.4	31.1
Basis differences in fixed assets	(38.5)	(4.1)
Rent	45.8	50.7
Interest	60.9	60.7
Accruals and reserves	34.8	39.6
Allowance for doubtful accounts	10.8	10.8
Basis differences in intangible assets	(412.3)	(402.2)
Investments in equity securities	(2.6)	48.6
Tax loss/tax credit carry forwards	404.4	443.6
Restructuring and other reorganization-related costs	(0.3)	2.6
Other	59.2	60.5
Total Deferred Tax Assets, Net	422.2	561.6
Valuation allowance	(332.2)	(467.3)	(392.9)	(489.9)
Net Deferred Tax Assets	$ 90.0	$ 94.3