Income Taxes Unrecognized Tax Benefits (Details 3) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Decrease in Unrecognized Tax Benefits is Reasonably Possible	$ 110
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	175
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	664
Unrecognized Tax Benefit Related to Methods of Accounting	1,600
Increase in Unrecognized Tax Benefits is Reasonably Possible	120
Unrecognized Tax Benefits Rollforward (Table Amounts) [Abstract]
Unrecognized tax benefits at beginning of the year	1,481	$ 1,223	$ 748
Additions based on tax positions related to the current year	355	187	158
Additions for tax positions of prior years	47	270	400
Reductions for tax positions of prior years	(251)	(190)	(65)
Settlements with taxing authorities	(1)	(7)	(15)
Other, net	(1)	(2)	(3)
Net change in unrecognized tax benefits	149	258	475
Unrecognized tax benefits at end of the year	$ 1,630	$ 1,481	$ 1,223