Fair value as of the balance sheet date of auction rate securities.

No definition available.

Name:	goog_AuctionRateSecuritiesAtFairValue
Namespace Prefix:	goog_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Unrealized loss as of balance sheet date for auction rate securities.

No definition available.

Name:	goog_AuctionRateSecuritiesUnrealizedLoss
Namespace Prefix:	goog_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Name:	goog_CashCashEquivalentsAndMarketableSecuritiesLineItems
Namespace Prefix:	goog_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration