Employee Benefit Plans - Aquantia Acquisition-related Equity Awards (Details) - USD ($) $ in Millions	Sep. 19, 2019	Sep. 18, 2019
Aquantia \| Aquantia Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense to be recognized	$ 32.6	$ 21.5

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

Name:	us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant