SUMMARY OF ACCOUNTING POLICIES - Additional Information (Detail) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2019	Jan. 01, 2018
Significant Accounting Policies [Line Items]
Investments and Restricted Cash	$ 25,000,000				$ 24,000,000				$ 25,000,000	$ 24,000,000
Allowance for doubtful account	138,000,000				93,000,000				138,000,000	93,000,000
Provision for doubtful accounts expense									254,000,000	194,000,000
Inventories	620,000,000				511,000,000				620,000,000	511,000,000
Capitalized interest									$ 87,000,000	91,000,000
Net actuarial gains or losses in excess of market-related value of plan assets or the plans' projected benefit obligations									10.00%
Net currency transaction gains and (losses), pre-tax									$ 9,000,000	(6,000,000)	$ (19,000,000)
Income tax benefit									(501,000,000)	(1,212,000,000)	(1,228,000,000)
Decrease in other financing activities									4,517,000,000	1,727,000,000	5,692,000,000
Increase in operating activities									10,459,000,000	8,639,000,000	12,711,000,000
Revenues	(24,896,000,000)	$ (21,238,000,000)	$ (20,459,000,000)	$ (18,035,000,000)	(20,568,000,000)	$ (18,318,000,000)	$ (18,048,000,000)	$ (17,160,000,000)	(84,628,000,000)	(74,094,000,000)	(71,861,000,000)
Costs and Expenses									76,944,000,000	66,296,000,000	64,837,000,000
Net Income	(3,347,000,000)	$ 1,957,000,000	$ 1,768,000,000	$ 965,000,000	(106,000,000)	$ 1,750,000,000	$ 1,685,000,000	$ 1,111,000,000	1,343,000,000	4,440,000,000	4,791,000,000
Operating Lease, Right-of-Use Asset	3,073,000,000				2,856,000,000				3,073,000,000	2,856,000,000		$ 2,700,000,000
Operating lease liability	3,100,000,000				2,929,000,000				3,100,000,000	2,929,000,000		$ 2,700,000,000
Increase (decrease) in allowance for expected credit losses									45,000,000
Goodwill impairment charge									494,000,000	0	0
Retained earnings	6,896,000,000				9,105,000,000				6,896,000,000	9,105,000,000
Decrease to AOCI	7,113,000,000				5,997,000,000				7,113,000,000	5,997,000,000	$ 4,994,000,000
Supply Chain & Freight
Significant Accounting Policies [Line Items]
Goodwill impairment charge									494,000,000
Licenses
Significant Accounting Policies [Line Items]
Indefinite-lived intangible assets	5,000,000								5,000,000
Trade Names
Significant Accounting Policies [Line Items]
Indefinite-lived intangible assets	200,000,000								200,000,000
Self Insurance Assumptions
Significant Accounting Policies [Line Items]
Costs and Expenses									(94,000,000)
Net Income									$ 72,000,000
Earnings Per Share, Basic and Diluted									$ 0.08
Minimum | Other Intangible Assets
Significant Accounting Policies [Line Items]
Finite-lived intangible assets, estimated useful lives range, Minimum									2 years
Minimum | Capitalized software
Significant Accounting Policies [Line Items]
Finite-lived intangible assets, estimated useful lives range, Minimum									7 years
Minimum | Vehicles
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives range									5 years
Minimum | Aircraft
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives range									12 years
Minimum | Buildings
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives range									10 years
Minimum | Plant Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives range									3 years
Minimum | Technology equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives range									3 years
Maximum | Other Intangible Assets
Significant Accounting Policies [Line Items]
Finite-lived intangible assets, estimated useful lives range, Minimum									22 years
Maximum | Vehicles
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives range									15 years
Maximum | Aircraft
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives range									40 years
Maximum | Buildings
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives range									40 years
Maximum | Plant Equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives range									20 years
Maximum | Technology equipment
Significant Accounting Policies [Line Items]
Property, plant and equipment, estimated useful lives range									10 years
cash held in escrow [Member]
Significant Accounting Policies [Line Items]
Restricted Cash and Cash Equivalents, Noncurrent	$ 2,000,000				$ 3,000,000				$ 2,000,000	$ 3,000,000
Adjustments
Significant Accounting Policies [Line Items]
Retained earnings													$ 735,000,000
Decrease to AOCI													$ 735,000,000