Schedule of Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	$ 5,588	$ 5,842	$ 5,720	$ 6,032
Charged to costs and expenses	201	531	(179)
Deductions	455	409	133
Credit losses [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	900	899	857	926
Charged to costs and expenses	430	385	50
Deductions	429	343	119
Doubtful receivables [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	77	69	93	47
Charged to costs and expenses	23	30	57
Deductions	15	54	11
Inventories (primarily service part obsolescence) [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	755	687	718	724
Charged to costs and expenses	68	(31)	(6)
Deductions	0	0	0
Deferred tax assets [Member]
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	407	846	822	1,067
Charged to costs and expenses	(428)	36	(242)
Deductions	11	12	3
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset, U.S. branch operations
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount	3,449	3,341	3,230	$ 3,268
Charged to costs and expenses	108	111	(38)
Deductions	$ 0	$ 0	$ 0