Postretirement Plans (Net Periodic Benefit Cost Tables) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2020
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost			$ 2	$ 2
Interest cost	520	498	1,561	1,493
Expected return on plan assets	(948)	(963)	(2,843)	(2,894)
Amortization of prior service credits	(20)	(20)	(61)	(60)
Recognized net actuarial loss	227	304	681	924
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment	(4)	152	(4)	156
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	(225)	(29)	(664)	(379)
Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	18	22	54	66
Interest cost	24	23	73	68
Expected return on plan assets	(3)	(3)	(8)	(6)
Amortization of prior service credits	(9)	(9)	(26)	(26)
Recognized net actuarial loss	(27)	(17)	(83)	(52)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit)	3	16	10	$ 50
BA_CompanyPensionPlan
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement and Curtailment		151
Other Comprehensive Income (Loss), Defined Benefit Plan, Settlement and Curtailment Gain (Loss), after Tax		$ 1,642
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		2.80%		2.80%	2.60%
BA_CompanyPensionPlan | Measurement Input, Discount Rate
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement		$ 923
BA_CompanyPensionPlan | BA_ReturnOnPlanAssets
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Remeasurement due to Settlement		719
Operating Income (Loss) | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (income)/cost included in (Loss)/earnings before income taxes			(2)	$ (2)
Operating Income (Loss) | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (income)/cost included in (Loss)/earnings before income taxes	(20)	(22)	(59)	(66)
Other Income | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (income)/cost included in (Loss)/earnings before income taxes	(225)	(29)	(666)	(381)
Other Income | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (income)/cost included in (Loss)/earnings before income taxes	(15)	(6)	(44)	(16)
Operating Income (Loss) Before Taxes | Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (income)/cost included in (Loss)/earnings before income taxes	(225)	(29)	(664)	(379)
Operating Income (Loss) Before Taxes | Other Postretirement Benefits Plan
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (income)/cost included in (Loss)/earnings before income taxes	$ (5)	$ (16)	$ (15)	$ (50)