Consolidated Statements of Cash Flow - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Operating Activities
Consolidated net income	$ 50.1	$ 77.7
Adjustments to reconcile consolidated net income to cash provided by operating activities:
Depreciation and amortization	27.9	29.3
Deferred income taxes	(12.3)	14.4
Amortization of deferred financing costs	0.9	1.7
Share-based compensation	5.9	4.2
Net loss on divestiture	3.1	(31.6)
Trade accounts receivable, net and receivables from long-term manufacturing contracts	(4.1)	(32.8)
Inventories, net	(32.1)	(2.1)
Prepaid expenses and other current assets	(1.7)	(5.1)
Trade accounts payable	30.1	(5.5)
accrued compensation, and other current liabilities	(28.3)	9.3
Income taxes payable	12.7	8.1
Defined benefit plan and postretirement funding	(2.3)	(2.3)
Defined benefit plan and postretirement expense	0.5	0.8
Other, net	(5.9)	0.1
Net cash provided by operating activities	44.5	66.2
Investing Activities
Capital expenditures	(9.7)	(5.6)
Proceeds from divestitures, net of cash divested		59.4
Net cash (used in) provided by investing activities	(14.2)	53.8
Financing Activities
Repayments on long-term debt	0.0	(220.0)
Proceeds from revolving credit facilities	0.0	226.0
Repayments on revolving credit facilities	0.0	(163.0)
Payments of dividends on common stock	(15.8)	(16.1)
Repurchases of common stock	(28.9)	0.0
Proceeds from stock option exercises	14.6	3.2
Payments for employee taxes on net settlement equity awards	(5.7)	(2.9)
Other, net	(1.6)	(1.3)
Net cash used in financing activities	(37.4)	(174.1)
Effect of exchange rates on cash and cash equivalents	4.4	9.7
Net cash flows	(2.7)	(44.4)
Cash, cash equivalents, and restricted cash:
At beginning of period	450.9	311.8
At end of period	$ 448.2	$ 267.4