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CONSOLIDATED STATEMENTS OF EARNINGS PARENTHETICAL | Feb. 28, 2014 shares
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Income Statement [Abstract] |
Stock issued during period (in shares) | 0.5

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- Definition Stock Issued During Period, Number of Shares for Every Share of Former Parent's Common Stock Held + References No definition available. + Details
Name: | kn_StockIssuedDuringPeriodNumberofSharesforEveryShareofFormerParentsCommonStockHeld
Namespace Prefix: | kn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

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- References No definition available. + Details
Name: | us-gaap_IncomeStatementAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration