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RECEIVABLES (Details) - USD ($) $ in Millions | Mar. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Other receivables | $ 77.5 | $ 95.0
Allowance for doubtful accounts | (9.8) | (9.2)
Total | 164.8 | 193.7
Westar Energy |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Other receivables | 61.2 | 71.6
Allowance for doubtful accounts | (4.2) | (3.9)
Total | 90.4 | 84.3
KCP&L |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Other receivables | 11.9 | 15.8
Allowance for doubtful accounts | (4.0) | (3.8)
Total | 41.8 | 62.7
Customer accounts receivable | Billed |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Customer accounts receivable | 15.0 | 16.7
Customer accounts receivable | Billed | Westar Energy |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Customer accounts receivable | 0.0 | 0.0
Customer accounts receivable | Billed | KCP&L |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Customer accounts receivable | 8.0 | 7.8
Customer accounts receivable | Unbilled |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Customer accounts receivable | 82.1 | 91.2
Customer accounts receivable | Unbilled | Westar Energy |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Customer accounts receivable | 33.4 | 16.6
Customer accounts receivable | Unbilled | KCP&L |  |
Accounts, Notes, Loans and Financing Receivable [Line Items] |  |
Customer accounts receivable | $ 25.9 | $ 42.9

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