Segment and Revenue Information Segment and Revenue Information (Schedule of Revenue Disaggregation) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Disaggregation of Revenue [Line Items]
Revenues	$ 25,146	$ 24,223	$ 72,786	$ 69,235
Unallocated items, eliminations and other [Member]
Disaggregation of Revenue [Line Items]
Revenues	(27)	131	(45)	287
Operating Segments [Member] | Global Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	4,091	3,579	12,124	10,784
Operating Segments [Member] | Global Services [Member] | Commercial Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	2,431	1,950	7,276	5,682
Operating Segments [Member] | Global Services [Member] | Government Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,608	1,617	4,703	5,064
Operating Segments [Member] | Global Services [Member] | External Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 4,039	$ 3,567	$ 11,979	$ 10,746
Operating Segments [Member] | Global Services [Member] | U S Government Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	32.00%	38.00%	32.00%	40.00%
Operating Segments [Member] | Global Services [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	85.00%	89.00%	88.00%	89.00%
Operating Segments [Member] | Global Services [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	51.00%	48.00%	52.00%	48.00%
Operating Segments [Member] | Commercial Airplanes Segment [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 15,276	$ 15,393	$ 43,409	$ 42,626
Operating Segments [Member] | Commercial Airplanes Segment [Member] | External Customers [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 14,962	$ 14,718	$ 42,287	$ 41,060
Operating Segments [Member] | Commercial Airplanes Segment [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	100.00%	100.00%	100.00%	100.00%
Operating Segments [Member] | Commercial Airplanes Segment [Member] | Transferred at Point in Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	91.00%	95.00%	94.00%	94.00%
Operating Segments [Member] | Commercial Airplanes Segment [Member] | Non-US [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 11,141	$ 10,846	$ 30,117	$ 28,940
Operating Segments [Member] | Commercial Airplanes Segment [Member] | Europe
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,882	1,754	7,189	6,519
Operating Segments [Member] | Commercial Airplanes Segment [Member] | China
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,677	4,016	9,433	7,510
Operating Segments [Member] | Commercial Airplanes Segment [Member] | Asia Other Than China
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,886	1,898	5,966	4,981
Operating Segments [Member] | Commercial Airplanes Segment [Member] | Middle East
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,598	2,577	3,931	7,157
Operating Segments [Member] | Commercial Airplanes Segment [Member] | Other
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	1,098	601	3,598	2,773
Operating Segments [Member] | Commercial Airplanes Segment [Member] | United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	3,821	3,872	12,170	12,120
Operating Segments [Member] | Defense, Space & Security [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 5,729	$ 5,050	$ 17,084	$ 15,304
Operating Segments [Member] | Defense, Space & Security [Member] | U S Government Contracts [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	85.00%	85.00%	86.00%	88.00%
Operating Segments [Member] | Defense, Space & Security [Member] | Fixed-price Contract [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	64.00%	63.00%	65.00%	64.00%
Operating Segments [Member] | Defense, Space & Security [Member] | Transferred over Time [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, excluding assessed tax, Percentage	97.00%	98.00%	98.00%	98.00%
Operating Segments [Member] | Defense, Space & Security [Member] | Non-US [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 1,551	$ 1,133	$ 4,883	$ 3,380
Operating Segments [Member] | Defense, Space & Security [Member] | United States
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	4,178	3,917	12,201	11,924
Intersegment Eliminations [Member] | Global Services [Member]
Disaggregation of Revenue [Line Items]
Revenues	52	12	145	38
Intersegment Eliminations [Member] | Commercial Airplanes Segment [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 314	$ 675	$ 1,122	$ 1,566