Taxes - Narrative (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Effective income tax rate	23.10%	23.40%	13.00%
Disposition of minority interest in foreign affiliate			$ 2,200
Undistributed earnings of foreign subsidiaries	$ 5,500
Net tax loss and credit carry forwards (tax effected)	2,224	$ 2,848
Net tax loss and credit carry forwards (tax effected), portion that will expire	1,700
Operating loss carry forwards amount	554
Increase (decrease) in valuation allowance	(609)
Valuation allowance	1,574	2,183
Unrecognized tax benefits, that if recognized, would favorably affect the effective income tax rate	$ 2,800	$ 2,500	$ 2,400