Revenue Recognition - Reconciliation of Contract Balances (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Reconciliation of Contract Balances
Notes and accounts receivable-trade (net of allowances of $250 in 2023 and $233 in 2022)	$ 5,757	$ 6,541
Notes and accounts receivable - trade, allowances	250	233
Contract assets	461	464
Deferred income (current)	13,220	12,032
Deferred income (noncurrent)	3,443	$ 3,499
Revenue recognized that was included in deferred income at the beginning of the period	$ 3,900