Consolidated Statement of Equity Statement - USD ($) $ in Millions	Total	Common stock	Additional paid-in-capital	Retained earnings	Retained earnings Cumulative effect of adoption of accounting standard	Accumulated other comprehensive income (loss)	Treasury stock	Noncontrolling interests in subsidiaries
Beginning balance at Sep. 30, 2019			$ 393	$ 24,199	$ 0	$ (1,722)	$ (15,114)	$ 40
Statement [Roll Forward]
Stock plans			54
Net earnings common stockholders	$ 326			326
Dividends paid				(305)				(5)
Foreign currency translation	99					99
Pension and postretirement						28
Cash flow hedges	19					19
Purchases							(129)
Issued under stock plans							96
Net earnings								3
Other comprehensive income	146
Ending balance at Dec. 31, 2019	8,459	$ 477	447	24,220		(1,576)	(15,147)	38
Statement [Roll Forward]
Common stockholders' equity	8,421
Common stockholders' equity	8,405
Beginning balance at Sep. 30, 2020	8,447		470	24,955	$ (1)	(1,577)	(15,920)	42
Statement [Roll Forward]
Stock plans			29
Net earnings common stockholders	445			445
Dividends paid				(303)				(5)
Foreign currency translation	189					189
Pension and postretirement						27
Cash flow hedges	31					31
Purchases							(13)
Issued under stock plans							86
Net earnings								7
Other comprehensive income	247
Ending balance at Dec. 31, 2020	8,939	$ 477	$ 499	$ 25,096		$ (1,330)	$ (15,847)	$ 44
Statement [Roll Forward]
Common stockholders' equity	$ 8,895