Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Cash flows from operating activities
Net income	$ 189,600,000	$ 98,500,000	$ 495,800,000
Income from discontinued operations, net of tax	174,300,000	150,900,000	798,000,000.0
Net income (loss) from continuing operations	15,300,000	(52,400,000)	(302,200,000)
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	117,000,000.0	114,700,000	147,300,000
Share based compensation	28,900,000	31,800,000	44,200,000
Unrealized loss on equity investments held	0	7,500,000	12,100,000
Realized (gain) loss on equity investments sold	(6,900,000)	9,300,000	0
Loss on sale of Coevorden operations	0	26,800,000	0
Write-off from impairment of goodwill	0	0	116,000,000.0
Write-off from impairment of intangible assets	0	24,200,000	35,400,000
Amortization of debt issuance costs and debt discount	5,600,000	6,400,000	9,900,000
Write-off of unamortized discount and debt issuance costs	7,900,000	1,100,000	38,300,000
Gain from extinguishment of Salus CLO debt	0	(76,200,000)	0
Purchase accounting inventory adjustment	7,300,000	0	0
Deferred tax (benefit) expense	(64,400,000)	24,600,000	(36,000,000.0)
Net changes in operating assets and liabilities
Receivables	65,900,000	(58,600,000)	(81,600,000)
Inventories	(219,600,000)	36,200,000	2,200,000
Prepaid expenses and other current assets	(9,700,000)	26,000,000.0	(1,600,000)
Accounts payable and accrued liabilities	116,000,000.0	99,800,000	(68,600,000)
Other	25,900,000	(19,400,000)	42,000,000.0
Net cash provided (used) by operating activities from continuing operations	89,200,000	201,800,000	(42,600,000)
Net cash provided by operating activities from discontinued operations	199,200,000	88,500,000	43,700,000
Net cash provided by operating activities	288,400,000	290,300,000	1,100,000
Cash flows from investing activities
Purchases of property, plant and equipment	(43,600,000)	(44,100,000)	(40,400,000)
Proceeds from disposal of property, plant and equipment	100,000	4,200,000	2,100,000
Proceeds from sale of Coevorden operations	0	29,000,000.0	0
Proceeds from sale of discontinued operations, net of cash	0	3,600,000	2,859,500,000
Business acquisitions, net of cash acquired	(429,900,000)	(16,900,000)	0
Proceeds from sale of equity investment	73,100,000	147,100,000	0
Other investing activity	(400,000)	2,300,000	(300,000)
Net cash (used) provided by investing activities from continuing operations	(400,700,000)	125,200,000	2,820,900,000
Net cash used by investing activities from discontinued operations	(22,800,000)	(16,900,000)	(23,300,000)
Net cash (used) provided by investing activities	(423,500,000)	108,300,000	2,797,600,000
Cash flows from financing activities
Payment of debt, including premium on extinguishment	(891,200,000)	(134,300,000)	(2,649,100,000)
Proceeds from issuance of debt	899,000,000.0	300,000,000.0	300,000,000.0
Payment of debt issuance costs	(12,600,000)	(11,500,000)	(4,100,000)
Treasury stock purchases	(125,800,000)	(239,800,000)	(268,500,000)
Accelerated share repurchase	0	(125,000,000.0)	0
Dividends paid to shareholders	(71,500,000)	(75,200,000)	(85,500,000)
Dividends paid by subsidiary to non-controlling interest	0	0	(1,100,000)
Share based award tax withholding payments, net of proceeds upon vesting	(8,300,000)	(12,600,000)	(4,400,000)
Payment of contingent consideration	0	(197,000,000.0)	(8,900,000)
Other financing activities, net	3,500,000	300,000	0
Net cash used by financing activities from continuing operations	(206,900,000)	(495,100,000)	(2,721,600,000)
Net cash used by financing activities from discontinued operations	(3,000,000.0)	(2,000,000.0)	(3,000,000.0)
Net cash used by financing activities	(209,900,000)	(497,100,000)	(2,724,600,000)
Effect of exchange rate changes on cash and cash equivalents	1,300,000	5,100,000	(8,400,000)
Net change in cash, cash equivalents and restricted cash	(343,700,000)	(93,400,000)	65,700,000
Net change in cash, cash equivalents and restricted cash in discontinued operations	0	0	0
Net change in cash, cash equivalents and restricted cash in continuing operations	(343,700,000)	(93,400,000)	65,700,000
Cash, cash equivalents, and restricted cash, beginning of period	533,700,000	627,100,000	561,400,000
Cash, cash equivalents, and restricted cash, end of period	190,000,000.0	533,700,000	627,100,000
Non cash investing activities
Acquisition of property, plant and equipment through capital leases	9,400,000	3,500,000	3,100,000
Non cash financing activities
Issuance of shares through stock compensation plan	17,900,000	39,600,000	30,800,000
Continuing Operations
Supplemental disclosure of cash flow information
Cash paid for interest	86,400,000	81,400,000	116,600,000
Cash paid for taxes	23,500,000	20,200,000	41,600,000
Discontinued Operations
Supplemental disclosure of cash flow information
Cash paid for interest	50,000,000.0	45,700,000	91,500,000
Cash paid for taxes	11,500,000	21,900,000	12,300,000
SB/RH
Cash flows from operating activities
Net income	191,600,000	42,500,000	542,600,000
Income from discontinued operations, net of tax	174,300,000	150,900,000	803,900,000
Net income (loss) from continuing operations	17,300,000	(108,400,000)	(261,300,000)
Adjustments to reconcile net income (loss) to net cash from operating activities:
Depreciation and amortization	117,000,000.0	114,700,000	147,300,000
Share based compensation	27,200,000	30,500,000	42,600,000
Unrealized loss on equity investments held	0	7,500,000	12,100,000
Realized (gain) loss on equity investments sold	(6,900,000)	9,300,000	0
Loss on sale of Coevorden operations	0	26,800,000	0
Write-off from impairment of goodwill	0	0	116,000,000.0
Write-off from impairment of intangible assets	0	24,200,000	35,400,000
Amortization of debt issuance costs and debt discount	5,600,000	5,500,000	6,400,000
Write-off of unamortized discount and debt issuance costs	7,900,000	1,100,000	14,400,000
Purchase accounting inventory adjustment	7,300,000	0	0
Deferred tax (benefit) expense	(63,000,000.0)	11,800,000	(20,100,000)
Net changes in operating assets and liabilities
Receivables	57,300,000	(86,300,000)	(104,000,000.0)
Inventories	(219,600,000)	36,200,000	2,200,000
Prepaid expenses and other current assets	(9,600,000)	26,600,000	(2,000,000.0)
Accounts payable and accrued liabilities	115,000,000.0	(95,500,000)	(62,000,000.0)
Other	26,200,000	(12,300,000)	38,100,000
Net cash provided (used) by operating activities from continuing operations	81,700,000	(8,300,000)	(34,900,000)
Net cash provided by operating activities from discontinued operations	199,200,000	88,500,000	49,700,000
Net cash provided by operating activities	280,900,000	80,200,000	14,800,000
Cash flows from investing activities
Purchases of property, plant and equipment	(43,600,000)	(44,100,000)	(40,400,000)
Proceeds from disposal of property, plant and equipment	100,000	4,200,000	2,100,000
Proceeds from sale of Coevorden operations	0	29,000,000.0	0
Proceeds from sale of discontinued operations, net of cash	0	3,600,000	2,859,500,000
Business acquisitions, net of cash acquired	(429,900,000)	(16,900,000)	0
Proceeds from sale of equity investment	73,100,000	147,100,000	0
Other investing activity	(400,000)	2,300,000	(300,000)
Net cash (used) provided by investing activities from continuing operations	(400,700,000)	125,200,000	2,820,900,000
Net cash used by investing activities from discontinued operations	(22,800,000)	(16,900,000)	(23,300,000)
Net cash (used) provided by investing activities	(423,500,000)	108,300,000	2,797,600,000
Cash flows from financing activities
Payment of debt, including premium on extinguishment	(891,200,000)	(134,300,000)	(2,261,900,000)
Proceeds from issuance of debt	899,000,000.0	300,000,000.0	300,000,000.0
Payment of debt issuance costs	(12,600,000)		(4,100,000)
Payment of cash dividends to parent	(192,300,000)	(241,000,000.0)	(717,400,000)
Dividends paid by subsidiary to non-controlling interest	0	0	(1,100,000)
Payment of contingent consideration	0	(197,000,000.0)	(8,900,000)
Net cash used by financing activities from continuing operations	(197,100,000)	(283,800,000)	(2,693,400,000)
Net cash used by financing activities from discontinued operations	(3,000,000.0)	(2,000,000.0)	(3,000,000.0)
Net cash used by financing activities	(200,100,000)	(285,800,000)	(2,696,400,000)
Effect of exchange rate changes on cash and cash equivalents	1,300,000	5,100,000	(8,400,000)
Net change in cash, cash equivalents and restricted cash	(341,400,000)	(92,200,000)	107,600,000
Cash, cash equivalents, and restricted cash, beginning of period	529,700,000	621,900,000	514,300,000
Cash, cash equivalents, and restricted cash, end of period	188,300,000	529,700,000	621,900,000
Non cash investing activities
Acquisition of property, plant and equipment through capital leases	9,400,000	3,500,000	3,100,000
SB/RH | Continuing Operations
Supplemental disclosure of cash flow information
Cash paid for interest	86,400,000	81,400,000	88,400,000
Cash paid for taxes	23,500,000	20,200,000	41,600,000
SB/RH | Discontinued Operations
Supplemental disclosure of cash flow information
Cash paid for interest	50,000,000.0	45,700,000	91,500,000
Cash paid for taxes	$ 11,500,000	$ 21,900,000	$ 12,300,000