Condensed Consolidated Statements Of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Jun. 30, 2019	Jun. 30, 2018
Cash flows from operating activities
Net (loss) income	$ 591.5	$ 988.1
(Loss) income from discontinued operations, net of tax	699.1	526.5
Net (loss) income from continuing operations	(107.6)	461.6
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	138.4	96.6
Share based compensation	35.8	7.0
Unrealized loss on investments	38.2
Purchase accounting inventory adjustment		0.8
Pet safety recall inventory write-off		3.6
Amortization of debt issuance costs and debt discount	8.3	15.7
Write-off of unamortized discount and debt issuance costs	36.6
Dividend from subsidiaries classified as discontinued operations		3.1
Deferred tax benefit	(25.2)	(403.5)
Net changes in operating assets and liabilities	(310.6)	(360.1)
Net cash used by operating activities from continuing operations	(186.1)	(175.2)
Net cash (used) provided by operating activities from discontinued operations	(250.4)	118.8
Net cash used by operating activities	(436.5)	(56.4)
Cash flows from investing activities
Purchases of property, plant and equipment	(40.3)	(56.6)
Proceeds from sales of property, plant and equipment	0.1	2.8
Proceeds from sale of discontinued operations, net of cash	2,854.4	1,546.8
Other investing activities	(0.2)	(0.5)
Net cash provided (used) by investing activities from continuing operations	2,814.0	1,492.5
Net cash used by investing activities from discontinued operations	(5.4)	(194.3)
Net cash provided (used) by investing activities	2,808.6	1,298.2
Cash flows from financing activities
Proceeds from issuance of debt	54.0	556.8
Payment of debt, including premium on extinguishment	(2,475.1)	(1,010.6)
Payment of debt issuance costs	(0.1)	(0.4)
Treasury stock purchases	(268.5)
Purchases of subsidiary stock, net		(288.0)
Dividends paid to shareholders	(65.1)
Dividends paid by subsidiary to non-controlling interest		(28.4)
Share based award tax withholding payments, net of proceeds upon vesting	(3.3)	(24.3)
Other financing activities, net	(8.9)	20.7
Net cash (used) provided by financing activities from continuing operations	(2,767.0)	(774.2)
Net cash (used) provided by financing activities from discontinued operations	(2.2)	117.7
Net cash (used) provided by financing activities	(2,769.2)	(656.5)
Effect of exchange rate changes on cash and cash equivalents	(2.9)	(3.1)
Net change in cash, cash equivalents and restricted cash	(400.0)	582.2
Net change in cash, cash equivalents and restricted cash in discontinued operations		37.7
Net change in cash, cash equivalents and restricted cash in continuing operations	(400.0)	544.5
Cash, cash equivalents, and restricted cash, beginning of period	561.4	254.8
Cash, cash equivalents, and restricted cash, end of period	161.4	799.3
Supplemental disclsoure of cash flow information
Cash paid for interest	172.1	234.7
Cash paid for taxes	43.9	32.7
Non cash investing activities
Acquisition of property, plant and equipment through capital leases	2.1	3.7
Non cash financing activities
Issuance of shares through stock conpensation plan	26.1
SB/RH [Member]
Cash flows from operating activities
Net (loss) income	639.0
(Loss) income from discontinued operations, net of tax	699.1
Net (loss) income from continuing operations	(60.1)
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization	138.4
Share based compensation	34.7
Unrealized loss on investments	38.2
Amortization of debt issuance costs and debt discount	5.0
Write-off of unamortized discount and debt issuance costs	12.7
Deferred tax benefit	(9.2)
Net changes in operating assets and liabilities	(331.1)
Net cash used by operating activities from continuing operations	(171.4)
Net cash (used) provided by operating activities from discontinued operations	(250.4)
Net cash used by operating activities	(421.8)
Cash flows from investing activities
Purchases of property, plant and equipment	(40.3)
Proceeds from sales of property, plant and equipment	0.1
Proceeds from sale of discontinued operations, net of cash	2,854.4
Other investing activities	(0.2)
Net cash provided (used) by investing activities from continuing operations	2,814.0
Net cash used by investing activities from discontinued operations	(5.4)
Net cash provided (used) by investing activities	2,808.6
Cash flows from financing activities
Proceeds from issuance of debt	54.0
Payment of debt, including premium on extinguishment	(2,087.9)
Payment of debt issuance costs	(0.1)
Payment of cash dividends to parent	(696.9)
Other financing activities, net	(8.9)
Net cash (used) provided by financing activities from continuing operations	(2,739.8)
Net cash (used) provided by financing activities from discontinued operations	(2.2)
Net cash (used) provided by financing activities	(2,742.0)
Effect of exchange rate changes on cash and cash equivalents	(2.9)
Net change in cash, cash equivalents and restricted cash	(358.1)
Cash, cash equivalents, and restricted cash, beginning of period	514.3
Cash, cash equivalents, and restricted cash, end of period	156.2
Supplemental disclsoure of cash flow information
Cash paid for interest	141.0
Cash paid for taxes	43.9
Non cash investing activities
Acquisition of property, plant and equipment through capital leases	$ 2.1
Nine Month Periods Ended July 1, 2018 [Member] | SB/RH [Member]
Cash flows from operating activities
Net (loss) income		269.3
(Loss) income from discontinued operations, net of tax		60.6
Net (loss) income from continuing operations		208.7
Adjustments to reconcile net income to net cash from operating activities:
Depreciation and amortization		96.5
Share based compensation		4.6
Purchase accounting inventory adjustment		0.8
Pet safety recall inventory write-off		3.6
Amortization of debt issuance costs and debt discount		6.7
Deferred tax benefit		(49.5)
Net changes in operating assets and liabilities		(390.5)
Net cash used by operating activities from continuing operations		(119.1)
Net cash (used) provided by operating activities from discontinued operations		21.6
Net cash used by operating activities		(97.5)
Cash flows from investing activities
Purchases of property, plant and equipment		(56.6)
Proceeds from sales of property, plant and equipment		2.8
Other investing activities		(0.5)
Net cash provided (used) by investing activities from continuing operations		(54.3)
Net cash used by investing activities from discontinued operations		(19.5)
Net cash provided (used) by investing activities		(73.8)
Cash flows from financing activities
Proceeds from issuance of debt		556.8
Payment of debt, including premium on extinguishment		(54.1)
Payment of debt issuance costs		(0.4)
Payment of cash dividends to parent		(351.8)
Net cash (used) provided by financing activities from continuing operations		150.5
Net cash (used) provided by financing activities from discontinued operations		2.6
Net cash (used) provided by financing activities		153.1
Effect of exchange rate changes on cash and cash equivalents		(3.1)
Net change in cash, cash equivalents and restricted cash		(21.3)
Cash, cash equivalents, and restricted cash, beginning of period		183.5
Cash, cash equivalents, and restricted cash, end of period		162.2
Supplemental disclsoure of cash flow information
Cash paid for interest		164.2
Cash paid for taxes		32.7
Non cash investing activities
Acquisition of property, plant and equipment through capital leases		$ 3.7