Commitments and Contingencies - Legal Claims and Insurance (Details) - USD ($) $ in Millions |
9 Months Ended | |
---|---|---|
Jun. 30, 2018 |
Jun. 30, 2017 |
|
Rollforward of reserves for legal claims | ||
Reserves for legal claims, beginning of period | $ 420.6 | $ 423.5 |
Increase in reserves | 47.2 | 86.2 |
Payments | (60.0) | (56.2) |
Reserves for legal claims, end of period | $ 407.8 | $ 453.5 |