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Consolidated Statement Of Stockholders' Equity - USD ($) $ in Millions | Total | Common stock | Accumulated deficit | Accumulated other comprehensive income (loss) | Noncontrolling Interest [Member] | Additional Paid-in Capital [Member]
--- | --- | --- | --- | --- | --- | ---
Other Comprehensive Income (Loss), Net of Tax |  |  |  | $ 5.0 |  |
Common Stock, Dividends, Per Share, Declared | $ 0.1000 |  |  |  |  |
Balance at Sep. 30, 2018 |  | $ 1.6 | $ (850.0) | (32.8) | $ 1.5 | $ 1,444.5
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Dividends declared |  |  |  |  |  | 15.8
Stock repurchased under buyback program |  |  |  |  |  | 0.0
Stock-based compensation |  |  |  |  |  | 2.3
Shares retained for employee taxes |  |  |  |  |  | 1.4
Stock issued under stock compensation plans | $ 0.0 |  |  |  |  | 3.6
Net Income (Loss) Attributable to Parent | (10.1) |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  |  |  | (0.4) |
Balance at Mar. 31, 2019 | 548.8 | 1.6 | (860.1) | (27.8) | 1.9 | 1,433.2
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Other |  |  |  |  |  | 0.0
Payments to Noncontrolling Interests | $ 0.0 |  |  |  |  |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders |  |  |  |  | 0.0 |
Other Comprehensive Income (Loss), Net of Tax |  |  |  | 5.8 |  |
Common Stock, Dividends, Per Share, Declared | $ 0.0500 |  |  |  |  |
Balance at Dec. 31, 2018 |  | 1.6 | (871.0) | (33.6) | 1.7 | 1,440.2
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Dividends declared |  |  |  |  |  | 7.9
Stock repurchased under buyback program |  |  |  |  |  | 0.0
Stock-based compensation |  |  |  |  |  | 0.6
Shares retained for employee taxes |  |  |  |  |  | 0.2
Stock issued under stock compensation plans | $ 0.0 |  |  |  |  | 0.5
Net Income (Loss) Attributable to Parent | 10.9 |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  |  |  | (0.2) |
Balance at Mar. 31, 2019 | 548.8 | 1.6 | (860.1) | (27.8) | 1.9 | 1,433.2
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Other |  |  |  |  |  | 0.0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders |  |  |  |  | 0.0 |
Common Stock, Value, Issued | 1.6 |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | $ 2.9 |  |  | 2.9 |  |
Common Stock, Dividends, Per Share, Declared | $ 0.1050 |  |  |  |  |
Balance at Sep. 30, 2019 | $ 592.3 | 1.6 | (786.2) | (36.0) | 2.2 | 1,410.7
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Dividends declared |  |  |  |  |  | 16.6
Stock repurchased under buyback program |  |  |  |  |  | (5.0)
Stock-based compensation |  |  |  |  |  | 2.7
Shares retained for employee taxes |  |  |  |  |  | 0.7
Stock issued under stock compensation plans | 0.0 |  |  |  |  | 2.2
Net Income (Loss) Attributable to Parent | 34.1 |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  |  |  | 0.0 |
Balance at Mar. 31, 2020 | 606.5 | 1.6 | (752.1) | (33.1) | 0.0 | 1,390.1
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Other |  |  |  |  |  | (3.2)
Payments to Noncontrolling Interests | $ 5.2 |  |  |  |  |
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders |  |  |  |  | (2.2) |
Other Comprehensive Income (Loss), Net of Tax |  |  |  | (1.1) |  |
Common Stock, Dividends, Per Share, Declared | $ 0.0525 |  |  |  |  |
Balance at Dec. 31, 2019 |  | 1.6 | (775.9) | (32.0) | 0.0 | 1,401.3
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Dividends declared |  |  |  |  |  | 8.3
Stock repurchased under buyback program |  |  |  |  |  | (5.0)
Stock-based compensation |  |  |  |  |  | 1.3
Shares retained for employee taxes |  |  |  |  |  | 0.0
Stock issued under stock compensation plans | $ 0.0 |  |  |  |  | 0.8
Net Income (Loss) Attributable to Parent | 23.8 |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  |  |  | 0.0 |
Balance at Mar. 31, 2020 | 606.5 | $ 1.6 | $ (752.1) | $ (33.1) | 0.0 | 1,390.1
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |
Adjustments to Additional Paid in Capital, Other |  |  |  |  |  | $ 0.0
Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders |  |  |  |  | $ 0.0 |
Common Stock, Value, Issued | $ 1.6 |  |  |  |  |

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