Related Party Transactions - Narrative (Details) $ in Millions	3 Months Ended
Mar. 31, 2017 USD ($)
McAfee LLC [Member]
Related Party Transaction [Line Items]
Sales and marketing expense related to partner referral fees	$ 0.9

Amount of selling, general and administrative expenses resulting from transactions, excluding transactions that are eliminated in consolidated or combined financial statements, with related party.

No definition available.

Name:	us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration