Schedule of Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	$ 2,764	$ 4,058	$ 1,884
Charged to costs and expenses	(141)	(937)	2,395
Deductions	133	357	221
Balance at end of period	2,490	2,764	4,058
Accounting Standards Update 2016-13 [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
SEC Schedule, 12-09, Valuation Allowances and Reserves, Increase (Decrease) Adjustment		(252)
Credit losses [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	926	1,332	530
Charged to costs and expenses	50	(306)	840
Deductions	119	100	38
Balance at end of period	857	926	1,332
Doubtful receivables [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	47	57	49
Charged to costs and expenses	57	3	28
Deductions	11	13	20
Balance at end of period	93	47	57
Inventories (primarily service part obsolescence) [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	724	688	462
Charged to costs and expenses	(6)	36	226
Deductions	0	0	0
Balance at end of period	718	724	688
Deferred tax assets [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of period	1,067	1,981	843
Charged to costs and expenses	(242)	(670)	1,301
Deductions	3	244	163
Balance at end of period	$ 822	$ 1,067	$ 1,981