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Goodwill and Acquired Intangible Assets - Narrative (Details) $ in Millions	3 Months Ended
	Jun. 30, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items]
Goodwill acquired during period	$ 7
Intellectual Property
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets acquired	$ 13

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+ References

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- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition.

+ References

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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