Liabilities, Commitments And Contingencies Liabilities, Commitments, and Contingencies (Schedule of 737 MAX Liability) (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2019	Jun. 30, 2019
Loss Contingencies [Line Items]
Accrued Liability 737 MAX	$ 7,389
B-737-Max [Member]
Loss Contingencies [Line Items]
Concessions and other in-kind consideration to customers	(133)
Revenue from Contract with Customer, Excluding Assessed Tax	2,649
B-737-Max [Member]
Loss Contingencies [Line Items]
Payments made to customers	$ (1,237)
Accrued Liability 737 MAX		$ 6,110