Income Taxes (Narrative) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
---|---|---|---|---|
Mar. 31, 2020 |
Mar. 31, 2019 |
Mar. 31, 2020 |
Mar. 31, 2019 |
|
Income Tax Disclosure [Abstract] | ||||
Net benefit related to equity affiliate from India Finance Act | $ 13.5 | $ 13.5 | ||
Proportionate share of accumulated dividend distribution taxes released per the India Finance Act | 33.8 | 33.8 | ||
Income tax provision related to estimated withholding taxes on future dividends | $ 20.3 | $ 20.3 | ||
Discrete net tax expense related to Tax Act | $ 40.6 | |||
Reversal of non-recurring benefit related to U.S. taxation of deemed foreign dividends | 56.2 | |||
Tax benefit related to finalization of assessment of impacts of Tax Act | $ 15.6 | |||
Effective tax rate (percent) | 22.70% | 19.90% | 21.30% | 23.30% |
Income tax payments, net of refunds | $ 253.5 | $ 165.6 |