Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Net cash provided by (used in) operating activities
Net income (loss)	$ 16.7	$ 10.3
Adjustments to reconcile net income (loss) to income (loss) from continuing operations:
Depreciation	7.7	7.0
Amortization	7.0	7.0
Stock-based compensation expense	1.9	1.3
Retirement plans	(0.5)	0.7
Deferred income taxes	1.6	1.0
Other noncash income (expense)	(1.4)	0.4
Changes in assets and liabilities, net of acquisitions:
Receivables	24.0	41.0
Inventories	(4.8)	(21.0)
Other current assets and other noncurrent assets	(1.3)	3.6
Accounts payable	(9.4)	(26.0)
Walter Energy Accrual	0.0	(22.0)
Other current liabilities	(9.9)	(12.8)
Long-term liabilities	(0.3)	(2.1)
Net cash provided by (used in) operating activities, total	34.1	(12.4)
Investing activities:
Capital expenditures	(15.6)	(15.2)
Proceeds from sales of assets	0.1	0.1
Net cash provided by (used in) investing activities, total	(15.5)	(15.1)
Financing activities:
Dividends paid	(8.7)	(8.3)
Acquisition of joint venture partner's interest	0.0	5.2
Shares retained for employee taxes	(0.9)	(0.7)
Common stock issued	0.6	1.4
Proceeds from Other Equity	3.9	0.0
Payments of financing costs	(0.5)	0.0
Other	(0.2)	0.0
Net cash provided by (used in) financing activities, total	(5.8)	(12.8)
Effect of currency exchange rate changes on cash	1.3	0.4
Net change in cash and cash equivalents	14.1	(39.9)
Cash and cash equivalents at beginning of period	208.9	176.7
Cash and cash equivalents at end of period	220.8	$ 136.8
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 223.0