Summary of Significant Accounting Policies Improving the Presentation of Net Periodic Pension Cost (Details) - USD ($) $ in Millions |
3 Months Ended | |
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Dec. 31, 2018 |
Dec. 31, 2017 |
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| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| 2017 Periodic Pension Cost Restatement | $ 0.2 | |
| Accounting Standards Update 2017-07 [Member] | Cost of Goods, Total [Member] | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| 2017 Periodic Pension Cost Restatement | $ (0.1) | |
| Accounting Standards Update 2017-07 [Member] | Operating expense | ||
| New Accounting Pronouncements or Change in Accounting Principle [Line Items] | ||
| 2017 Periodic Pension Cost Restatement | $ 0.1 | |
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- Definition Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements. No definition available.
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