Income Taxes Income Taxes - Tax Reform (Details) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Sep. 30, 2019 |
Sep. 30, 2018 |
Sep. 30, 2017 |
|
| Income Tax Disclosure - Tax Reform [Abstract] | |||
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount | $ 8.6 | ||
| Foreign Earnings Repatriated | $ 13.0 | ||
| Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount | 11.2 | ||
| Undistributed Earnings of Foreign Subsidiaries | $ 383.5 | $ 354.7 | |
| Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate | 21.00% | 25.00% | 35.00% |
| Effective Income Tax Rate Reconciliation, Other Adjustments, Percent | 2.20% | 0.00% | 0.00% |
| Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent | 0.00% | 8.50% | 0.00% |
| Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Percent | 0.00% | 11.00% | 0.00% |
| X | ||||||||||
- Definition Income Tax Disclosure - Tax Reform [Abstract] No definition available.
|
| X | ||||||||||
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to changes in the income tax rates. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to the repatriation of foreign earnings. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of foreign earnings repatriated from subsidiaries outside the country of domicile. No definition available.
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to repatriation of foreign earnings. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount of undistributed earnings of foreign subsidiaries intended to be permanently reinvested outside the country of domicile. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|