Stock-Based Compensation (Schedule Of Changes In Shares Subject To Options) (Details) - Stock Options [Member] $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Sep. 30, 2022 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Average exercise price per share, Beginning of year | $ / shares	$ 57.96
Average exercise price per share, Options granted | $ / shares	0
Average exercise price per share, Options exercised | $ / shares	57.21
Average exercise price per share, Options canceled | $ / shares	57.98
Average exercise price per share, End of year | $ / shares	58.10
Average exercise price per share, Exercisable at year end | $ / shares	$ 58.10
Shares, Beginning of year | shares	2,017
Shares, Options granted | shares	0
Shares, Options exercised | shares	(315)
Shares, Options canceled | shares	(10)
Shares, End of year | shares	1,692
Shares, Exercisable at year end | shares	1,692
Total intrinsic value of awards, End of year | $	$ 27
Total intrinsic value of awards, Exercisable at year end | $	$ 27
Average remaining life, End of year	2 years 2 months 12 days
Average remaining life, Exercisable at year end	2 years 2 months 12 days