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v3.21.2

Condensed Consolidated Statement of Share Owners' Equity Parentheticals - shares | 3 Months Ended
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Sep. 30, 2021 | Sep. 30, 2020
Performance Share Issuance, Shares | 144,000 | 156,000

X
- Definition Number of shares issued during the period for Performance Shares. + References No definition available. + Details
Name: | ke_PerformanceShareIssuanceShares
Namespace Prefix: | ke_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration