Supplemental Balance Sheet Information (Components of Other Assets) (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Schedule Of Other Assets [Line Items]
Deferred tax assets	$ 587.6	$ 544.3
Investments	47.5	47.6
Deferred software	166.2	140.6
Interest-rate swap agreements (Note 11 and 12)	162.1	103.9
Other	182.6	182.2
Other assets	$ 1,146.0	$ 1,018.6

Schedule Of Other Assets [Line Items]

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