Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Insurance and employee benefits	$ 994	$ 1,126
Inventory and contract balances	571	639
Warranty provisions	240	242
Capitalization of research and experimental expenditures	1,631	1,712
Other asset basis differences	779	828
Powder Metal Matter	644	0
Tax loss carryforwards	905	305
Tax credit carryforwards	891	970
Deferred Tax Assets, Valuation Allowance	(1,465)	(842)
Future Income Tax Benefits	5,190	4,980
Deferred Tax Liabilities Intangible Assets	6,228	6,588
Fixed assets	1,739	1,751
Other items, net	238	220
Future Income Taxes Payable	$ 8,205	$ 8,559