Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities
Net income	$ 1,419.7	$ 424.3	$ 420.3
Adjustments to reconcile net income to cash flows from operating activities:
Income from discontinued operations	(1,220.3)	(314.9)	(220.2)
Loss on extinguishment of debt	0.0	0.0	36.4
Depreciation and amortization	88.8	71.4	62.1
Deferred income taxes	33.6	18.0	56.9
(Gain) loss on pension and other postretirement plan remeasurements	(41.6)	43.9	(74.3)
Stock-based compensation expense	12.2	14.4	13.7
Other, net	11.9	4.2	3.4
Change in assets and liabilities
Receivables	26.4	(17.5)	(17.4)
Inventories	(3.3)	(5.4)	(5.3)
Payables and accrued liabilities	111.3	24.5	26.7
Other assets and liabilities	(85.7)	(128.5)	(120.1)
Operating cash flows from continuing operations	353.0	134.4	182.2
Operating cash flows from discontinued operations	(393.8)	149.8	221.7
Total cash (used in) provided by operating activities	(40.8)	284.2	403.9
Cash flows from investing activities
Additions to property, plant and equipment	(180.5)	(132.0)	(103.1)
Acquisitions of businesses	(36.3)	(50.7)	(281.7)
Purchases of investments	(440.4)	0.0	0.0
Proceeds from maturities of short-term investments	80.0	0.0	0.0
Other investing activities, net	0.0	11.8	26.1
Investing cash flows from continuing operations	(577.2)	(170.9)	(358.7)
Investing cash flows from discontinued operations	2,620.9	(36.7)	(41.2)
Total cash provided by (used in) investing activities	2,043.7	(207.6)	(399.9)
Cash flows from financing activities
Proceeds from borrowings, net of issuance costs of $3.0 million and $7.1 million in 2023 and 2021, respectively	921.0	23.0	527.9
Repayments on borrowings	(920.9)	(38.1)	(800.0)
Premium paid to extinguish debt	0.0	0.0	(26.2)
Repurchases of common stock	(1,524.8)	(142.6)	(126.9)
Cash dividends paid	(21.8)	(89.2)	(90.9)
Other financing activities	(19.0)	(16.0)	(10.0)
Financing cash flows from continuing operations	(1,565.5)	(262.9)	(526.1)
Financing cash flows from discontinued operations	(108.1)	44.0	(9.4)
Total cash used in financing activities	(1,673.6)	(218.9)	(535.5)
Effect of currency exchange rate changes on cash, cash equivalents and restricted cash	(0.1)	(5.2)	2.4
Increase (decrease) in cash, cash equivalents and restricted cash	329.2	(147.5)	(529.1)
Cash, cash equivalents and restricted cash - beginning of year	83.9	231.4	760.5
Cash, cash equivalents and restricted cash - end of year	413.1	83.9	231.4
Interest paid	69.6	59.4	62.1
Income taxes paid	$ 373.8	$ 73.9	$ 72.3