Supplemental Balance Sheet Information (Components of Other Assets) (Details) (USD $) In Millions, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Schedule Of Other Assets [Line Items]
Deferred tax assets	$ 805.7	$ 759.5
Deferred software	193.7	176.7
Interest-rate swap agreements (Note 11 and 12)	104.2	153.6
Investments	43.6	44.4
Other	161.1	177.5
Other assets	$ 1,308.3	$ 1,311.7

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The carrying amount of capitalized computer software costs net of accumulated amortization as of the balance sheet date.

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Amount after allocation of valuation allowances of noncurrent deferred tax asset attributable to deductible temporary differences and carryforwards. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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Carrying amount as of the balance sheet date of the assets arising from derivative contracts and hedging activities, which are expected to be converted into cash or otherwise disposed of after a year or beyond the normal operating cycle, if longer.

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The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

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Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

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