Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Increase in income tax expense	$ 8,116
Effective tax rate	28.30%	27.50%	25.40%
Decrease in deferred tax liabilities	$ 1,513
Decrease in deferred tax assets	226
Loss carryforward	9,850
Tax credit carryforward	440
Carry forward amount of foreign tax credit with expiration dates	12,599
Existing undistributed accumulated earnings of foreign subsidiary	$ 51,300
Percentage of impact of unrecognized tax benefits on effective tax rate if subsequently recognized	80.00%
Unrecognized tax benefits	$ 5,323	$ 5,288	$ 5,018	$ 4,987
Anticipated interest and penalty obligations	112
Accrued benefit for interest and penalties		(76)
Income tax benefit expense associated with interest and penalties	$ 152	$ 19	$ (124)