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Related Party Transactions	9 Months Ended
	Oct. 31, 2018
Related Party Transactions [Abstract]
Related Party Transactions	Related Party Transactions We lease certain office space from an affiliate of our Chairman, Mr. Duffield, adjacent to our corporate headquarters in Pleasanton, California, under various lease agreements. The average term of the agreements is 8 years. The total rent expense under these agreements was $3 million and $2 million for the three months ended October 31, 2018 and 2017, respectively, and $8 million and $6 million for the nine months ended October 31, 2018 and 2017, respectively.

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No definition available.

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- Definition

The entire disclosure for related party transactions. Examples of related party transactions include transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners; and (d) affiliates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-URI http://asc.fasb.org/topic&trid=2122745

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