Other Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Other Liabilities Disclosure [Abstract]
Salaries and wages	$ 1,022	$ 1,007
Less current portion of lease liabilities	337	330
Dividends Payable, Current	331	316
Retirement benefits	288	306
Workers' compensation	270	338
Other	1,292	1,436
Other current liabilities	3,540	3,733
Retirement benefits	2,813	5,182
Long-term lease liabilities	1,343	1,404
Other	2,558	2,230
Other liabilities	7,964	9,688
Lease liabilities	$ 1,250	$ 872