Goodwill, Customer Relationships and Other Intangible Assets - Rollforward Goodwill (Details) - USD ($)					12 Months Ended
	Oct. 31, 2021	Jul. 31, 2021	Jan. 31, 2021	Oct. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill Activity
As of beginning of period					$ 15,986,000,000	$ 18,870,000,000
Classified as held for sale						(2,859,000,000)
Effect of foreign currency exchange rate change and other					(58,000,000)	(25,000,000)
Impairment	$ 0	$ 0	$ 0	$ (2,600,000,000)	(3,271,000,000)	0	$ (2,642,000,000)
As of end of period			0		12,657,000,000	15,986,000,000	18,870,000,000
Goodwill accumulated impairment loss					11,000,000,000	7,700,000,000	12,900,000,000
International and Global Accounts
Goodwill Activity
As of beginning of period					0	2,555,000,000
As of end of period			(2,555,000,000)			0	2,555,000,000
Enterprise
Goodwill Activity
As of beginning of period					0	4,738,000,000
As of end of period			(4,738,000,000)			0	4,738,000,000
Small and Medium Business
Goodwill Activity
As of beginning of period					0	2,808,000,000
As of end of period			(2,808,000,000)			0	2,808,000,000
Wholesale
Goodwill Activity
As of beginning of period					0	3,114,000,000
As of end of period			(3,114,000,000)			0	3,114,000,000
Consumer
Goodwill Activity
As of beginning of period					0	5,655,000,000
As of end of period			(5,655,000,000)			0	$ 5,655,000,000
Business
Goodwill Activity
As of beginning of period					11,235,000,000
Classified as held for sale						(913,000,000)
Effect of foreign currency exchange rate change and other					(58,000,000)	(25,000,000)
Impairment					(3,271,000,000)
As of end of period			12,173,000,000		7,906,000,000	11,235,000,000
Mass Markets
Goodwill Activity
As of beginning of period					4,751,000,000
Classified as held for sale						(1,946,000,000)
Effect of foreign currency exchange rate change and other					0	0
As of end of period			$ 6,697,000,000		$ 4,751,000,000	$ 4,751,000,000