SEGMENT AND GEOGRAPHIC INFORMATION - Revenue by Product Type (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue from External Customer [Line Items]
Revenue	$ 97,287	$ 84,628	$ 74,094
U.S. Domestic Package
Revenue from External Customer [Line Items]
Revenue	60,317	53,499	46,493
International Package
Revenue from External Customer [Line Items]
Revenue	19,541	15,945	14,220
Supply Chain  Solutions
Revenue from External Customer [Line Items]
Revenue	17,429	15,184	13,381
Supply Chain  Solutions | Operating Segments
Revenue from External Customer [Line Items]
Revenue	17,429	15,184	13,381
Forwarding
Revenue from External Customer [Line Items]
Revenue	9,872	6,975	5,867
Logistics
Revenue from External Customer [Line Items]
Revenue	4,767	4,073	3,435
Freight
Revenue from External Customer [Line Items]
Revenue	1,064	3,149	3,265
Other
Revenue from External Customer [Line Items]
Revenue	1,726	987	814
United States
Revenue from External Customer [Line Items]
Revenue	74,376	66,580	58,699
United States | U.S. Domestic Package | Operating Segments
Revenue from External Customer [Line Items]
Revenue	60,317	53,499	46,493
United States | Next Day Air
Revenue from External Customer [Line Items]
Revenue	10,009	8,522	8,479
United States | Deferred
Revenue from External Customer [Line Items]
Revenue	5,846	5,665	5,180
United States | Ground
Revenue from External Customer [Line Items]
Revenue	44,462	39,312	32,834
International Package
Revenue from External Customer [Line Items]
Revenue	22,911	18,048	15,395
International Package | International Package | Operating Segments
Revenue from External Customer [Line Items]
Revenue	19,541	15,945	14,220
International Package | Domestic
Revenue from External Customer [Line Items]
Revenue	3,690	3,160	2,836
International Package | Export
Revenue from External Customer [Line Items]
Revenue	15,012	12,159	10,837
International Package | Cargo
Revenue from External Customer [Line Items]
Revenue	$ 839	$ 626	$ 547