Restructuring Program - Narrative (Details) - USD ($) $ in Millions					3 Months Ended		9 Months Ended		113 Months Ended
	Jul. 25, 2023	Sep. 06, 2018	Aug. 31, 2016	May 06, 2014	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023
2014-2018 Restructuring Program
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost			$ 5,700	$ 3,500
Reallocation of previously approved capital expenditures to be spent on restructuring program cash costs			600
2014-2018 Restructuring Program \| Maximum
Restructuring Cost and Reserve [Line Items]
Approved capital expenditures			1,600	$ 2,200
2014-2018 Restructuring Program \| Restructuring Program Charges
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost			4,100
2014-2018 Restructuring Program \| Cash Costs
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost			3,100
2014-2018 Restructuring Program \| Non-cash Costs
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost			$ 1,000
Simplify to Grow Program
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost	$ 7,700
Restructuring and implementation charges					$ 20	$ 16	$ 61	$ 70	$ 5,208
Implementation costs					$ 4	$ 23	$ 13	$ 62	$ 2,088
Simplify to Grow Program \| Maximum
Restructuring Cost and Reserve [Line Items]
Approved capital expenditures	2,300
Increase in approved restructuring program costs		$ 1,300
Increase in approved capital expenditures		$ 700
Simplify to Grow Program \| Restructuring Program Charges
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost	5,400
Simplify to Grow Program \| Cash Costs
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost	4,100
Simplify to Grow Program \| Non-cash Costs
Restructuring Cost and Reserve [Line Items]
Approved restructuring program cost	$ 1,300