Basis of Presentation and Summary of Accounting Principles (Schedule of change in accounting estimates) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Change in Accounting Estimate [Line Items]
Operating profit (loss)	$ 4,958	$ (1,889)	$ 4,914
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 3,897	$ (3,109)	$ 3,510
Income (loss) from continuing operations attributable to common shareowners	$ 2.58	$ (2.29)	$ 4.06
Contract with Customer, Performance Obligation Satisfied in Previous Period	$ 296	$ (407)	$ (106)
Contracts Accounted for under Percentage of Completion
Change in Accounting Estimate [Line Items]
Operating profit (loss)	110	(643)	(69)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent	$ 87	$ (508)	$ (55)
Income (loss) from continuing operations attributable to common shareowners	$ 0.06	$ (0.37)	$ (0.06)