Guarantor Statements (Statement Of Cash Flows) (Details) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations	$ (279.7)	$ (257.3)
Net cash (used) provided by operating activities from discontinued operations	(254.0)	71.5
Net cash used by operating activities	(533.7)	(185.8)
Cash flows from investing activities
Purchases of property, plant and equipment	(27.1)	(38.1)
Proceeds from sales of property, plant and equipment	0.1	0.9
Proceeds from sale of discontinued operations, net of cash	2,854.4	1,520.2
Net cash provided (used) by investing activities from continuing operations	2,827.4	1,483.0
Net cash used by investing activities from discontinued operations	(5.3)	(185.1)
Net cash provided (used) by investing activities	2,822.1	1,297.9
Cash flows from financing activities
Proceeds from issuance of debt	136.3	581.3
Payment of debt, including premium on extinguishment	(2,479.9)	(998.0)
Payment of debt issuance costs	(0.1)	(0.3)
Net cash (used) provided by financing activities from continuing operations	(2,659.3)	(707.4)
Net cash (used) provided by financing activities from discontinued operations	(2.3)	118.5
Net cash (used) provided by financing activities	(2,661.6)	(588.9)
Effect of exchange rate changes on cash, restricted cash and cash equivalents	(3.1)	3.2
Net change in cash, cash equivalents and restricted cash	(376.3)	526.4
Cash, cash equivalents and restricted cash, beginning of period	561.4	254.8
Cash, cash equivalents and restricted cash, end of period	185.1	743.5
Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations	353.6
Net cash (used) provided by operating activities from discontinued operations	2.2
Net cash used by operating activities	355.8
Cash flows from investing activities
Purchases of property, plant and equipment	(13.4)
Proceeds from sale of discontinued operations, net of cash	2,854.4
Net cash provided (used) by investing activities from continuing operations	2,841.0
Net cash used by investing activities from discontinued operations	(1.1)
Net cash provided (used) by investing activities	2,839.9
Cash flows from financing activities
Proceeds from issuance of debt	126.0
Payment of debt, including premium on extinguishment	(2,074.5)
Payment of debt issuance costs	(0.1)
Payment of cash dividends to parent	(676.4)
Advances related to intercompany transactions	(832.8)
Net cash (used) provided by financing activities from continuing operations	(3,457.8)
Net cash (used) provided by financing activities from discontinued operations	(1.1)
Net cash (used) provided by financing activities	(3,458.9)
Net change in cash, cash equivalents and restricted cash	(263.2)
Cash, cash equivalents and restricted cash, beginning of period	285.5
Cash, cash equivalents and restricted cash, end of period	22.3
SB/RH [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations	(267.3)
Net cash (used) provided by operating activities from discontinued operations	(254.0)
Net cash used by operating activities	(521.3)
Cash flows from investing activities
Purchases of property, plant and equipment	(27.1)
Proceeds from sales of property, plant and equipment	0.1
Proceeds from sale of discontinued operations, net of cash	2,854.4
Net cash provided (used) by investing activities from continuing operations	2,827.4
Net cash used by investing activities from discontinued operations	(5.3)
Net cash provided (used) by investing activities	2,822.1
Cash flows from financing activities
Proceeds from issuance of debt	136.3
Payment of debt, including premium on extinguishment	(2,092.6)
Payment of debt issuance costs	(0.1)
Payment of cash dividends to parent	(676.4)
Net cash (used) provided by financing activities from continuing operations	(2,632.8)
Net cash (used) provided by financing activities from discontinued operations	(2.3)
Net cash (used) provided by financing activities	(2,635.1)
Effect of exchange rate changes on cash, restricted cash and cash equivalents	(3.1)
Net change in cash, cash equivalents and restricted cash	(337.4)
Cash, cash equivalents and restricted cash, beginning of period	514.3
Cash, cash equivalents and restricted cash, end of period	176.9
Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations	313.8
Net cash (used) provided by operating activities from discontinued operations	2.5
Net cash used by operating activities	316.3
Cash flows from investing activities
Purchases of property, plant and equipment	(7.0)
Net cash provided (used) by investing activities from continuing operations	(7.0)
Net cash used by investing activities from discontinued operations	(2.5)
Net cash provided (used) by investing activities	(9.5)
Cash flows from financing activities
Advances related to intercompany transactions	(307.9)
Net cash (used) provided by financing activities from continuing operations	(307.9)
Net cash (used) provided by financing activities	(307.9)
Net change in cash, cash equivalents and restricted cash	(1.1)
Cash, cash equivalents and restricted cash, beginning of period	1.8
Cash, cash equivalents and restricted cash, end of period	0.7
Nonguarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations	2,009.7
Net cash (used) provided by operating activities from discontinued operations	2.9
Net cash used by operating activities	2,012.6
Cash flows from investing activities
Purchases of property, plant and equipment	(6.7)
Proceeds from sales of property, plant and equipment	0.1
Net cash provided (used) by investing activities from continuing operations	(6.6)
Net cash used by investing activities from discontinued operations	(1.7)
Net cash provided (used) by investing activities	(8.3)
Cash flows from financing activities
Proceeds from issuance of debt	10.3
Payment of debt, including premium on extinguishment	(18.1)
Advances related to intercompany transactions	(2,065.3)
Net cash (used) provided by financing activities from continuing operations	(2,073.1)
Net cash (used) provided by financing activities from discontinued operations	(1.2)
Net cash (used) provided by financing activities	(2,074.3)
Effect of exchange rate changes on cash, restricted cash and cash equivalents	(3.1)
Net change in cash, cash equivalents and restricted cash	(73.1)
Cash, cash equivalents and restricted cash, beginning of period	227.0
Cash, cash equivalents and restricted cash, end of period	153.9
Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations	(2,944.4)
Net cash (used) provided by operating activities from discontinued operations	(261.6)
Net cash used by operating activities	(3,206.0)
Cash flows from financing activities
Advances related to intercompany transactions	3,206.0
Net cash (used) provided by financing activities from continuing operations	3,206.0
Net cash (used) provided by financing activities	$ 3,206.0
Six Month Periods Ended April 1, 2018 [Member] | Parent [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations		(245.5)
Net cash (used) provided by operating activities from discontinued operations		2.8
Net cash used by operating activities		(242.7)
Cash flows from investing activities
Purchases of property, plant and equipment		(15.1)
Proceeds from sales of property, plant and equipment		0.6
Net cash provided (used) by investing activities from continuing operations		(14.5)
Net cash used by investing activities from discontinued operations		(2.7)
Net cash provided (used) by investing activities		(17.2)
Cash flows from financing activities
Proceeds from issuance of debt		570.5
Payment of debt, including premium on extinguishment		(37.4)
Payment of debt issuance costs		(0.3)
Payment of cash dividends to parent		(298.6)
Advances related to intercompany transactions		20.9
Net cash (used) provided by financing activities from continuing operations		255.1
Net cash (used) provided by financing activities		255.1
Net change in cash, cash equivalents and restricted cash		(4.8)
Cash, cash equivalents and restricted cash, beginning of period		21.3
Cash, cash equivalents and restricted cash, end of period		16.5
Six Month Periods Ended April 1, 2018 [Member] | SB/RH [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations		(207.1)
Net cash (used) provided by operating activities from discontinued operations		(25.9)
Net cash used by operating activities		(233.0)
Cash flows from investing activities
Purchases of property, plant and equipment		(38.1)
Proceeds from sales of property, plant and equipment		0.8
Net cash provided (used) by investing activities from continuing operations		(37.3)
Net cash used by investing activities from discontinued operations		(10.2)
Net cash provided (used) by investing activities		(47.5)
Cash flows from financing activities
Proceeds from issuance of debt		581.3
Payment of debt, including premium on extinguishment		(41.4)
Payment of debt issuance costs		(0.3)
Payment of cash dividends to parent		(298.6)
Net cash (used) provided by financing activities from continuing operations		241.0
Net cash (used) provided by financing activities from discontinued operations		3.3
Net cash (used) provided by financing activities		244.3
Effect of exchange rate changes on cash, restricted cash and cash equivalents		3.2
Net change in cash, cash equivalents and restricted cash		(33.0)
Cash, cash equivalents and restricted cash, beginning of period		183.5
Cash, cash equivalents and restricted cash, end of period		150.5
Six Month Periods Ended April 1, 2018 [Member] | Guarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations		(32.7)
Net cash (used) provided by operating activities from discontinued operations		2.9
Net cash used by operating activities		(29.8)
Cash flows from investing activities
Purchases of property, plant and equipment		(6.5)
Proceeds from sales of property, plant and equipment		0.1
Net cash provided (used) by investing activities from continuing operations		(6.4)
Net cash used by investing activities from discontinued operations		(2.9)
Net cash provided (used) by investing activities		(9.3)
Cash flows from financing activities
Advances related to intercompany transactions		34.9
Net cash (used) provided by financing activities from continuing operations		34.9
Net cash (used) provided by financing activities		34.9
Net change in cash, cash equivalents and restricted cash		(4.2)
Cash, cash equivalents and restricted cash, beginning of period		4.8
Cash, cash equivalents and restricted cash, end of period		0.6
Six Month Periods Ended April 1, 2018 [Member] | Nonguarantor Subsidiaries [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations		61.6
Net cash (used) provided by operating activities from discontinued operations		1.3
Net cash used by operating activities		62.9
Cash flows from investing activities
Purchases of property, plant and equipment		(16.5)
Proceeds from sales of property, plant and equipment		0.1
Net cash provided (used) by investing activities from continuing operations		(16.4)
Net cash used by investing activities from discontinued operations		(4.6)
Net cash provided (used) by investing activities		(21.0)
Cash flows from financing activities
Proceeds from issuance of debt		10.8
Payment of debt, including premium on extinguishment		(4.0)
Advances related to intercompany transactions		(79.2)
Net cash (used) provided by financing activities from continuing operations		(72.4)
Net cash (used) provided by financing activities from discontinued operations		3.3
Net cash (used) provided by financing activities		(69.1)
Effect of exchange rate changes on cash, restricted cash and cash equivalents		3.2
Net change in cash, cash equivalents and restricted cash		(24.0)
Cash, cash equivalents and restricted cash, beginning of period		157.4
Cash, cash equivalents and restricted cash, end of period		133.4
Six Month Periods Ended April 1, 2018 [Member] | Eliminations [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash (used) provided by operating activities from continuing operations		9.5
Net cash (used) provided by operating activities from discontinued operations		(32.9)
Net cash used by operating activities		(23.4)
Cash flows from financing activities
Advances related to intercompany transactions		23.4
Net cash (used) provided by financing activities from continuing operations		23.4
Net cash (used) provided by financing activities		$ 23.4