Income Taxes (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Insurance and employee benefits	$ 1,831	$ 3,004
Inventory and contract balances	756	822
Warranty provisions	248	220
Other asset basis differences	878	637
Tax loss carryforwards	251	196
Tax credit carryforwards	1,088	959
Deferred Tax Assets, Valuation Allowance	(825)	(757)
Future Income Tax Benefits	4,227	5,081
Deferred Tax Liabilities Intangible Assets	7,168	7,786
Fixed assets	1,746	1,637
Other items, net	323	151
Future Income Taxes Payable	$ 9,237	$ 9,574