Quarterly Financial Information (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Quarterly Financial Data [Abstract]
Net sales	$ 5,360	$ 5,005	$ 4,791	$ 4,473	$ 4,947	$ 4,697	$ 4,431	$ 4,161	$ 19,629	$ 18,236	$ 16,785
Gross profit	2,317	2,097	1,952	1,822	1,996	1,982	1,862	1,723	8,188	7,563
Net earnings common stockholders	$ 740	$ 921	$ 674	$ 896	$ 670	$ 627	$ 561	$ 445	$ 3,231	$ 2,303	$ 1,965
Basic earnings per common share	$ 1.25	$ 1.55	$ 1.13	$ 1.51	$ 1.12	$ 1.05	$ 0.94	$ 0.74	$ 5.44	$ 3.85	$ 3.26
Diluted earnings per common share	1.24	1.54	1.13	1.50	1.11	1.04	0.93	0.74	5.41	3.82	3.24
Dividends per common share	$ 0.515	$ 0.515	$ 0.515	$ 0.515	$ 0.505	$ 0.505	$ 0.505	$ 0.505	$ 2.06	$ 2.02	$ 2.00