Related-Party Transactions (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
Oct. 31, 2014
Related Party Transactions [Abstract]
Value of resources donated to related parties	$ 1.0
Value of donated subscriptions to related parties	$ 32.0

Fair Value of Donated Subscriptions to Related Parties

No definition available.

Name:	crm_FairValueOfDonatedSubscriptionsToRelatedParties
Namespace Prefix:	crm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration