Share Based Compensation (Summary Of Activity Of The RSUs Granted) (Details) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Sep. 30, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares | shares	1.5
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 53.11
Granted, Fair Value at Grant Date | $	$ 81.4
Time-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares | shares	0.6
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 53.25
Granted, Fair Value at Grant Date | $	$ 32.2
Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares | shares	0.9
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 53.03
Granted, Fair Value at Grant Date | $	$ 49.2
Performance-Based RSUs [Member] | Vesting In Less Than 24 Months [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares | shares	0.4
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 53.08
Granted, Fair Value at Grant Date | $	$ 24.5
Performance-Based RSUs [Member] | Vesting In More Than 24 Months [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares | shares	0.5
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 52.98
Granted, Fair Value at Grant Date | $	$ 24.7
SB/RH [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares | shares	1.5
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 52.82
Granted, Fair Value at Grant Date | $	$ 79.8
SB/RH [Member] | Time-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares | shares	0.6
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 52.50
Granted, Fair Value at Grant Date | $	$ 30.6
SB/RH [Member] | Performance-Based RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares | shares	0.9
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 53.03
Granted, Fair Value at Grant Date | $	$ 49.2
SB/RH [Member] | Performance-Based RSUs [Member] | Vesting In Less Than 24 Months [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares | shares	0.4
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 53.08
Granted, Fair Value at Grant Date | $	$ 24.5
SB/RH [Member] | Performance-Based RSUs [Member] | Vesting In More Than 24 Months [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, Shares | shares	0.5
Granted, Weighted Average Grant Date Fair Value | $ / shares	$ 52.98
Granted, Fair Value at Grant Date | $	$ 24.7