Summary of Significant Accounting Policies (Details) (USD $)	3 Months Ended	9 Months Ended
Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010
Summary of Significant Accounting Policies [Abstract]
Number of reportable operating segments	three		three
Number of primary geographic regions	three		three
Effective income tax rate (in hundredths)	27.00%	25.00%	27.10%	28.00%
Business acquisition purchase price cost of acquired entity	$ 6,100,000,000		$ 6,100,000,000
Merger Consideration Expected To Be Paid Per Outstanding Shares			68.50
Total Outstanding Shares Voted	85.70%		85.70%
Shares Voted In Favor Of The Merger	99.90%		99.90%
Shares Voted Against The Merger	0.05%		0.05%
Bank of America Counterparty [Member]
Concentration Risk [Line Items]
Notional amount of equity hedges related to convertible note hedge	176,500,000		176,500,000
Notional amount of interest rate protection agreements	50,000,000		50,000,000
Notional amount of foreign currency exchange contracts	4,900,000		4,900,000
JP Morgan Chase Counterparty [Member]
Concentration Risk [Line Items]
Notional amount of equity hedges related to convertible note hedge	176,500,000		176,500,000
Notional amount of interest rate protection agreements	25,000,000		25,000,000
Notional amount of foreign currency exchange contracts	$ 7,000,000		$ 7,000,000

The total estimated cost of the acquired entity including the cash to be paid to shareholders and the value of the entity's outstanding debt.

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Expected amount of cash to be paid per share to stockholders in ta proposed merger transaction.

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The number of primary geographic regions for which supplemental information is provided.

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The number of reportable / global operating segments which correspond to the entity's business units.

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Of the shares that were voted, approximately 0.05% voted against the Merger.

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Of the shares that were voted, approximately 99.9% voted in favor of the Merger.

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Approximately 85.7% of the outstanding shares of our common stock as of the record date were voted at the special meeting.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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Aggregate notional amount of foreign currency exchange rate derivatives. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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Aggregate notional amount of interest rate derivatives, which relates to the currency amount specified in the interest rate derivative instruments.

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