Description of Business Segments and Summary of Significant Accounting Policies - Additional Information (Details) $ / shares in Units, shares in Millions, $ in Millions		1 Months Ended	12 Months Ended			32 Months Ended
	Jun. 10, 2024 $ / shares	Jun. 30, 2024 USD ($) Employee	May 31, 2024 USD ($) AirCraft $ / shares shares	May 31, 2023 USD ($) AirCraft $ / shares shares	May 31, 2022 USD ($) $ / shares shares	May 31, 2023 USD ($) Employee	Jul. 15, 2024 USD ($)	Mar. 31, 2024 USD ($)	Feb. 29, 2024 USD ($)	Dec. 16, 2021 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Gross contract assets related to in-transit shipments			$ 672	$ 686		$ 686
Contract assets net of deferred unearned revenue			463	484		484
Contract liabilities related to advance payments from customers			$ 23	19		19
Payment terms of customer contracts			Under the typical payment terms of our customer contracts, the customer pays at periodic intervals (e.g., every 15 days, 30 days, 45 days, etc.) for shipments included on invoices received. It is not customary business practice to extend payment terms past 90 days, and as such, we do not have a practice of including a significant financing component within our revenue contracts with customers.
Advertising and promotion expenses			$ 421	435	$ 470
Depreciable life range for majority of aircraft costs			18 to 30 years
Depreciation expense, excluding gains and losses on sales of property and equipment			$ 4,287	4,176	3,970
Interest costs capitalized			81	77	$ 62
Noncash impairment charges			157	70
Noncash impairment charges net of tax			$ 120	$ 54
Noncash impairment charges net of tax per diluted share | $ / shares			$ 0.48	$ 0.21
Number of Idle Aircraft | AirCraft			19
Number of months aircraft remained idle			an average of eight months
Business optimization costs, net of tax			$ 444	$ 209
Business optimization costs per diluted share | $ / shares			$ 1.77	$ 0.81
Business optimization costs			$ 582	$ 273
Number of shares repurchased | shares			9.8	9.2	8.9
Payments for repurchase of common stock			$ 2,500	$ 1,500	$ 2,248
Business realignment costs			0	$ 36	$ 278	$ 430
Business realignment costs per diluted share | $ / shares				$ 0.11	$ 0.80
Number of employees left or voluntarily leaving | Employee						5,000
Business realignment costs, net of tax				$ 27	$ 214
Business employee severance costs paid				118	$ 225
Supply Chain Finance [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Outstanding payment obligations			$ 94	$ 83		$ 83
Subsequent Event [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Cash dividend payable amount per share | $ / shares	$ 1.38
Cash dividend payable, date declared	Jun. 10, 2024
Cash dividend payable, date of record	Jun. 24, 2024
Cash dividend payable, date to be paid	Jul. 09, 2024
Consultation process expected occur period		18 months
2022 Repurchase Program
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Stock repurchase program amount authorized to be repurchased										$ 5,000
Accelerated Share Repurchase Agreement
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Stock repurchase program amount authorized to be repurchased, remaining available amount									$ 564
Stock repurchase program amount authorized to be repurchased								$ 5,000
Treasury stock acquired, average cost per share | $ / shares			$ 255.34	$ 163.39
Payments for repurchase of common stock			$ 2,500	$ 1,500
Accelerated Share Repurchase Agreement | Subsequent Event [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Stock repurchase program amount authorized to be repurchased, remaining available amount							$ 4,100
Stock repurchase program amount authorized to be repurchased		$ 1,000
2024 Repurchase Program
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of shares repurchased | shares			9.8	9.2
Boeing MD-11F aircraft [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircraft to be permanently retired from service | AirCraft				12
Number of aircraft engines to be permanently retired from service | AirCraft				25
Boeing 757-200 aircraft [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircraft to be permanently retired from service | AirCraft			22	4
Number of aircraft engines to be permanently retired from service | AirCraft			7	1
Airbus A300-600 aircraft [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Number of aircraft to be permanently retired from service | AirCraft				2
Number of aircraft engines to be permanently retired from service | AirCraft				8
Minimum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Intangible assets amortization periods			1 year
Minimum [Member] | Subsequent Event [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Expected cash expenditures		$ 250
Number of employees left or voluntarily leaving | Employee		1,700
Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Intangible assets amortization periods			15 years
Maximum [Member] | Subsequent Event [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Expected cash expenditures		$ 375
Number of employees left or voluntarily leaving | Employee		2,000