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MERGER OF GREAT PLAINS ENERGY AND EVERGY KANSAS CENTRAL - Schedule of Pre-tax Costs and Deferrals (Details) - Great Plains Energy $ in Millions | 12 Months Ended
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Dec. 31, 2018 USD ($)
Business Acquisition [Line Items] |
One-time bill credits | $ (59.7)
Annual bill credits | (10.5)
Total impact to operating revenues | (70.2)
Charitable contributions and community support | 24.7
Voluntary severance and accelerated equity compensation | 47.9
Other transaction and transition costs | 51.0
Reallocation and deferral of merger transition costs | (47.8)
Total impact to operating and maintenance expense | 75.8
Total | (146.0)
Evergy Kansas Central |
Business Acquisition [Line Items] |
One-time bill credits | (23.1)
Annual bill credits | (7.9)
Total impact to operating revenues | (31.0)
Charitable contributions and community support | 0.0
Voluntary severance and accelerated equity compensation | 44.2
Other transaction and transition costs | 21.5
Reallocation and deferral of merger transition costs | (13.8)
Total impact to operating and maintenance expense | 51.9
Total | (82.9)
Evergy Metro |
Business Acquisition [Line Items] |
One-time bill credits | (22.4)
Annual bill credits | (2.6)
Total impact to operating revenues | (25.0)
Charitable contributions and community support | 0.0
Voluntary severance and accelerated equity compensation | 2.6
Other transaction and transition costs | 2.1
Reallocation and deferral of merger transition costs | (23.2)
Total impact to operating and maintenance expense | (18.5)
Total | $ (6.5)

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