Segment and Revenue Information (Schedule Of Depreciation And Amortization Expense By Segment) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 2,246	$ 2,271	$ 2,114
Operating Segments [Member] | Commercial Airplanes
Segment Reporting Information [Line Items]
Depreciation and amortization	559	580	565
Depreciation and Amortization Expense, Business Segment Allocation	397	407	417
Operating Segments [Member] | Defense, Space & Security
Segment Reporting Information [Line Items]
Depreciation and amortization	251	256	270
Depreciation and Amortization Expense, Business Segment Allocation	236	257	213
Operating Segments [Member] | Global Services
Segment Reporting Information [Line Items]
Depreciation and amortization	408	424	348
Depreciation and Amortization Expense, Business Segment Allocation	56	53	62
Operating Segments [Member] | Boeing Capital Corporation [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	66	64	58
Corporate Reconciling Items And Eliminations [Member]
Segment Reporting Information [Line Items]
Depreciation and amortization	962	947	873
Intersegment Eliminations [Member]
Segment Reporting Information [Line Items]
Depreciation and Amortization Expense, Business Segment Allocation	$ 689	$ 717	$ 692