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Consolidated Statement Of Stockholders' Equity - USD ($) $ in Millions | Total | Common stock | Additional paid-in capital | Accumulated deficit | Accumulated other comprehensive income (loss) | Noncontrolling Interest [Member] | Stock-based Compensation Related [Member] | Stock-based Compensation Related [Member] Common stock | Stock-based Compensation Related [Member] Additional paid-in capital | Stock-based Compensation Related [Member] Accumulated deficit | Stock-based Compensation Related [Member] Accumulated other comprehensive income (loss) | Stock-based Compensation Related [Member] Noncontrolling Interest [Member] | Stock Repurchase Program [Member] | Stock Repurchase Program [Member] Common stock | Stock Repurchase Program [Member] Additional paid-in capital | Stock Repurchase Program [Member] Accumulated deficit | Stock Repurchase Program [Member] Accumulated other comprehensive income (loss) | Stock Repurchase Program [Member] Noncontrolling Interest [Member]
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance at Sep. 30, 2012 | $ 231.2 | $ 1.6 | $ 1,587.3 | $ (1,270.0) | $ (87.7) | $ 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | 40.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  |  |  |  | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | 40.8 | 0.0 | 0.0 | 40.8 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared | (11.0) | 0.0 | (11.0) | 0.0 | 0.0 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation | 6.5 | 0.0 | 6.5 | 0.0 | 0.0 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Shares retained for employee taxes |  |  |  |  |  |  | $ (1.5) | $ 0.0 | $ (1.5) | $ 0.0 | $ 0.0 | $ 0.0 |  |  |  |  |  |
Stock issued under stock compensation plans | 3.1 | 0.0 | 3.1 | 0.0 | 0.0 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | 59.1 | 0.0 | 0.0 | 0.0 | 59.1 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Balance at Sep. 30, 2013 | 328.2 | 1.6 | 1,584.4 | (1,229.2) | (28.6) | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | 55.4 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  |  |  |  | (0.1) |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | 55.5 | 0.0 | 0.0 | 55.5 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared | (11.2) | 0.0 | (11.2) | 0.0 | 0.0 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation | 8.5 | 0.0 | 8.5 | 0.0 | 0.0 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Shares retained for employee taxes |  |  |  |  |  |  | (3.1) | 0.0 | $ (3.1) | 0.0 | 0.0 | 0.0 |  |  |  |  |  |
Stock issued under stock compensation plans | 4.2 | 0.0 | 4.2 | 0.0 | 0.0 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Interest in Joint Venture | 1.7 | 0.0 | 0.0 | 0.0 | 0.0 | 1.7 |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | (32.1) | 0.0 | 0.0 | 0.0 | (32.1) | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Balance at Sep. 30, 2014 | 351.6 | 1.6 | 1,582.8 | (1,173.7) | (60.7) | 1.6 |  |  |  |  |  |  |  |  |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net income (loss) | 30.8 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Noncontrolling Interest |  |  |  |  |  | (0.1) |  |  |  |  |  |  |  |  |  |  |  |
Net Income (Loss) Attributable to Parent | 30.9 | 0.0 | 0.0 |  | 0.0 |  |  |  |  |  |  |  |  |  |  |  |  |
Dividends declared | (12.0) | 0.0 | (12.0) | 0.0 | 0.0 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Stock-based compensation | 4.9 | 0.0 | 4.9 | 0.0 | 0.0 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Adjustment to Additional Paid in Capital, Income Tax Effect from Share-based Compensation, Net | 3.2 | 0.0 | 3.2 | 0.0 | 0.0 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Shares retained for employee taxes |  |  |  |  |  |  | $ (2.4) | $ 0.0 |  | $ 0.0 | $ 0.0 | $ 0.0 | $ (5.0) | $ 0.0 | $ (5.0) | $ 0.0 | $ 0.0 | $ 0.0
Stock issued under stock compensation plans | 3.3 | 0.0 | 3.3 | 0.0 | 0.0 | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Payments to Acquire Interest in Joint Venture | 1.7 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Comprehensive Income (Loss), Net of Tax | (6.6) | 0.0 | 0.0 | 0.0 | (6.6) | 0.0 |  |  |  |  |  |  |  |  |  |  |  |
Balance at Sep. 30, 2015 | $ 367.8 | $ 1.6 | $ 1,574.8 | $ (1,142.8) | $ (67.3) | $ 1.5 |  |  |  |  |  |  |  |  |  |  |  |

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