COMBINED AND CONSOLIDATED STATEMENT OF OPERATIONS (Parenthetical) shares in Millions	Nov. 01, 2014 shares
Income Statement [Abstract]
Stock issued during period shares issued in connection with separation	167

Stock Issued During Period Shares Issued In Connection With Separation from Former Parent

No definition available.

Name:	keys_StockIssuedDuringPeriodSharesIssuedInConnectionWithSeparationfromFormerParent
Namespace Prefix:	keys_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant