Business Combinations (Details 1) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Feb. 17, 2012
Purchase prices for the acquisitions
Cash and cash equivalents	$ 241
Short-term marketable securities	48
Accounts receivable, net	46
Inventory	101
Prepaid and other current assets	19
Property and equipment, net	17
Other assets	29
Purchased intangible assets	1,782
Goodwill	1,930
Total assets acquired	4,213
Accounts payable	47
Accrued liabilities	42
Net deferred tax liabilities	67
Contingent consideration	53	53
Long-term liabilities	44
Total liabilities assumed	253
Purchase price allocation	$ 3,960