Company and Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2013 Customer	Dec. 31, 2013 Customer		Dec. 31, 2012 Customer	Dec. 31, 2011 Customer
Organization and Summary of Significant Accounting Policies [Line Items]
Number of users		800,000,000
Number of customers that accounted for more than 10% of accounts receivable balance	0	0		0
Number of customers that accounted for more than 10% of revenue during the period		0		0	0
Foreign currency translation gain					$ 9,000,000
Foreign currency translation loss		6,000,000		1,000,000
Buildings estimated useful life, years		25
Capitalized software and labor costs		130,000,000		180,000,000	192,000,000
Amortization of capitalized cost total		175,000,000		142,000,000	114,000,000
Capitalized amount of stock-based compensation		16,000,000		24,000,000	22,000,000
Goodwill impairment charge	63,555,000	63,555,000
Gain on sale of patents	70,000,000	79,950,000
Proceeds from the sale of patents	70,000,000	79,950,000
Capital lease period maximum		12 years
Interest expense on lease		5,000,000		5,000,000	5,000,000
Net lease obligations	44,000,000	44,000,000		37,000,000
Income taxes paid		208,000,000		2,300,000,000	96,000,000
Revenue share rate from Microsoft's services under the Search Agreement, to be received in first five years		88.00%
Advertising expense total		128,000,000		103,000,000	148,000,000
EMEA
Organization and Summary of Significant Accounting Policies [Line Items]
Goodwill impairment charge		63,555,000	[1]
EMEA | Middle East
Organization and Summary of Significant Accounting Policies [Line Items]
Goodwill impairment charge	$ 63,555,000
Minimum
Organization and Summary of Significant Accounting Policies [Line Items]
Computers and equipment and furniture and fixtures estimated useful life, years		3 years
Amortizable intangible assets, useful life, years		1 year
Vesting period, years		1 year
Maximum
Organization and Summary of Significant Accounting Policies [Line Items]
Computers and equipment and furniture and fixtures estimated useful life, years		5 years
Amortizable intangible assets, useful life, years		8 years
Vesting period, years		4 years
Capitalized Software And Labor | Minimum
Organization and Summary of Significant Accounting Policies [Line Items]
Amortizable intangible assets, useful life, years		1 year
Capitalized Software And Labor | Maximum
Organization and Summary of Significant Accounting Policies [Line Items]
Amortizable intangible assets, useful life, years		3 years

[1] Gross goodwill balances for the EMEA segment were $1.1 billion as of both January 1, 2012 and December 31, 2013. The EMEA segment includes accumulated impairment losses of $488 million as of January 1, 2012, and $551 million as of December 31, 2013.