Acquisitions (Details) (USD $)	Oct. 28, 2011
Business Acquisition [Line Items]
Acquisition of Companies, cash paid	$ 2,700,000,000
Business Acquisition, Purchase Price Allocation, Goodwill Amount	1,600,000,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangibles	749,000,000
Compensation-related expenses that will be expensed over a period of one to three years	$ 150,000,000