Revenues and Operating Income Loss by Operating Segments (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Segment Reporting Information [Line Items]
Revenues	$ 50,175	$ 37,905	$ 29,321
Income loss from operations	12,760	11,742	10,381
Google
Segment Reporting Information [Line Items]
Revenues	46,039	37,905	29,321
Income loss from operations	16,308	14,216	11,757
Home
Segment Reporting Information [Line Items]
Revenues	4,136	0	0
Income loss from operations	$ (393)	$ 0	$ 0