COMBINED STATEMENTS OF CASH FLOWS (Condensed) (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flow from Operating Activities
Net earnings/(loss)	$ 56.9	$ (71.6)
Net loss from discontinued operations	0.0	(131.1)
Net (loss)/earnings from continuing operations	56.9	59.5
Non-cash integration and restructuring charges	3.5	8.1
Depreciation and amortization	58.7	56.1
Deferred income taxes	2.1	2.6
Share-based compensation expense	9.4	15.9
Loss on extinguishment of debt	75.7	4.2
Non-cash items included in income, net	10.8	10.2
Other, net	(0.3)	(0.1)
Changes in current assets and liabilities used in operations	(204.4)	(57.3)
Net cash from operating activities from continuing operations	12.4	99.2
Net cash used by operating activities from discontinued operations	0.0	(12.9)
Net cash from operating activities	12.4	86.3
Cash Flow from Investing Activities
Capital expenditures	(19.2)	(27.7)
Proceeds from sale of assets	0.1	1.5
Acquisitions, net of cash acquired	(67.1)	(4.5)
Net cash used by investing activities from continuing operations	(86.2)	(30.7)
Net cash from investing activities from discontinued operations	0.0	305.9
Net cash (used by)/from investing activities	(86.2)	275.2
Cash Flow from Financing Activities
Cash proceeds from issuance of debt with original maturities greater than 90 days	1,200.0	365.0
Payments on debt with maturities greater than 90 days	(1,983.9)	(747.2)
Net increase in debt with original maturities of 90 days or less	88.1	150.3
Premiums paid on extinguishment of debt		0.0
Debt issuance costs	(17.7)	(0.9)
Payment of contingent consideration	(3.9)	0.0
Dividends paid on common stock	(43.3)	(43.7)
Dividends paid on mandatory convertible preferred stock	(8.1)	(8.1)
Common stock purchased	(21.3)	(45.0)
Taxes paid for withheld share-based payments	(6.7)	(9.7)
Net cash used by financing activities from continuing operations	(919.3)	(339.3)
Net cash used by financing activities from discontinued operations	0.0	(1.1)
Net cash used by financing activities	(919.3)	(340.4)
Effect of exchange rate changes on cash	4.3	(1.7)
Net decrease in cash, cash equivalents, and restricted cash from continuing operations	(988.8)	(272.5)
Net increase in cash, cash equivalents, and restricted cash from discontinued operations	0.0	291.9
Net (decrease)/increase in cash, cash equivalents, and restricted cash	(988.8)	19.4
Cash, cash equivalents, and restricted cash, beginning of period	1,249.8	258.5
Cash, cash equivalents, and restricted cash, end of period	$ 261.0	$ 277.9