Tax Matters - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Contingency [Line Items]
Repatriation tax liability	$ 15,000
Unremitted earnings of international subsidiaries	60,000
Unrecognized tax benefits excluding associated interest	2,900	$ 4,500
Deferred tax assets associated with unrecognized tax benefits	1,500	1,500
Increase (decrease) of interest on income taxes expense	(17)	108	$ 89
Unrecognized tax benefits, interest on income taxes accrued	552	601
Unrecognized accrued interest decrease as a result of cash payments	31	1
Decrease in unrecognized tax benefits is reasonably possible, amount of unrecorded benefit	100
Noncurrent Deferred Tax Assets And Other Noncurrent Tax Assets [Member]
Income Tax Contingency [Line Items]
Deferred tax assets associated with unrecognized tax benefits	1,500	1,400
Other Taxes Payable [Member]
Income Tax Contingency [Line Items]
Deferred tax assets associated with unrecognized tax benefits	$ 45	$ 105