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Consolidated Statements of Changes in Equity - Westar Energy, Inc Statement - USD ($) $ in Millions | Total | Common stock | Retained earnings | Non-controlling interests | Westar Energy | Westar Energy Common stock | Westar Energy Retained earnings | Westar Energy Non-controlling interests
--- | --- | --- | --- | --- | --- | --- | --- | ---
Beginning balance (in shares) at Dec. 31, 2017 |  | 142,094,275 |  |  |  | 142,094,275 |  |
Beginning balance at Dec. 31, 2017 | $ 3,860.4 | $ 2,734.8 | $ 1,173.3 | $ (47.7) | $ 3,860.4 | $ 2,734.8 | $ 1,173.3 | $ (47.7)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income | 62.9 |  | 60.5 | 2.4 | 62.9 |  | 60.5 | 2.4
Issuance of stock for compensation and reinvested dividends (in shares) |  | 138,828 |  |  |  | 138,828 |  |
Issuance of stock for compensation and reinvested dividends | (3.7) | $ (3.7) |  |  | (3.7) | $ (3.7) |  |
Dividends declared on common stock | (57.7) |  | (57.7) |  | (57.7) |  | (57.7) |
Stock compensation expense | 2.5 | $ 2.5 |  |  | 2.5 | $ 2.5 |  |
Ending balance (in shares) at Mar. 31, 2018 |  | 142,233,103 |  |  |  | 142,233,103 |  |
Ending balance at Mar. 31, 2018 | 3,864.4 | $ 2,733.6 | 1,176.1 | (45.3) | 3,864.4 | $ 2,733.6 | 1,176.1 | (45.3)
Beginning balance (in shares) at Dec. 31, 2018 |  | 255,326,252 |  |  |  | 1 |  |
Beginning balance at Dec. 31, 2018 | 9,990.7 | $ 8,685.2 | 1,346.0 | (37.5) | 3,960.7 | $ 2,737.6 | 1,260.6 | (37.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |
Net income | 103.4 |  | 99.5 | 3.9 | 68.3 |  | 64.4 | 3.9
Issuance of stock for compensation and reinvested dividends (in shares) |  | 60,594 |  |  |  |  |  |
Issuance of stock for compensation and reinvested dividends | (1.6) | $ (1.6) |  |  |  |  |  |
Dividends declared on common stock | (119.8) |  | (119.8) |  | (110.0) |  | (110.0) |
Stock compensation expense | 5.4 | $ 5.4 |  |  |  |  |  |
Consolidation of noncontrolling interests | 3.8 |  |  | 3.8 | 3.8 |  |  | 3.8
Distributions to shareholders of noncontrolling interests | (1.4) |  |  | (1.4) | (1.4) |  |  | (1.4)
Ending balance (in shares) at Mar. 31, 2019 |  | 244,838,786 |  |  |  | 1 |  |
Ending balance at Mar. 31, 2019 | $ 9,391.7 | $ 8,110.4 | $ 1,325.7 | $ (31.2) | $ 3,921.4 | $ 2,737.6 | $ 1,215.0 | $ (31.2)

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