Commitments And Contingencies (Narrative) (Details) $ in Billions	12 Months Ended
	Dec. 31, 2020 USD ($) agreement employee
Commitments and Contingencies [Line Items]
Letters of credit and guarantees | $	$ 1.4
Number of company-negotiated labor agreements	61
Number of collective agreements expected to be renegotiated	19
Number of employees covered by expected renegotiated collective agreements | employee	2,200
Unionized Employees Concentration Risk
Commitments and Contingencies [Line Items]
Percent of employees represented by labor organizations	20.00%
Maximum | Aerospace
Commitments and Contingencies [Line Items]
Period preceding delivery of aircraft to customer fair market value of trade-in aircraft is established, days, maximum	45 days