Restructuring Initiatives (Restructuring Charges Incurred to Date for 2005 and 2009 Restructuring Programs) (Details) (2005 And 2009 Restructuring Programs [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended							87 Months Ended
	Mar. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Dec. 31, 2008	Dec. 31, 2007	Dec. 31, 2006	Dec. 31, 2005	Mar. 31, 2012
Charges recorded to date	$ (1.1)	$ 3.4	$ 41.3	$ 130.3	$ 17.8	$ 109.3	$ 192.1	$ 51.6	$ 544.7
Charges to be incurred on approved initiatives	1.5
Total expected charges on approved initiatives	546.2
Employee-Related Costs [Member]
Charges recorded to date									493.7
Charges to be incurred on approved initiatives	1.2
Total expected charges on approved initiatives	494.9
Asset Write-Offs [Member]
Charges recorded to date									10.8
Charges to be incurred on approved initiatives	0
Total expected charges on approved initiatives	10.8
Inventory Write-offs [Member]
Charges recorded to date									7.2
Charges to be incurred on approved initiatives	0
Total expected charges on approved initiatives	7.2
Currency Translation Adjustment Write Offs [Member]
Charges recorded to date									11.6
Charges to be incurred on approved initiatives	0
Total expected charges on approved initiatives	11.6
Contract Terminations / Other [Member]
Charges recorded to date									21.4
Charges to be incurred on approved initiatives	0.3
Total expected charges on approved initiatives	$ 21.7