ACQUISITIONS - Narrative (Details) $ / shares in Units, € in Millions, $ in Millions				3 Months Ended		6 Months Ended
	Jun. 30, 2025 USD ($)	Jun. 30, 2025 EUR (€)	Jan. 31, 2025 USD ($) plant $ / shares shares	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)
Business Combination [Line Items]
Net (gains) losses on sales and impairments of businesses				$ (51)	$ 0	$ (51)	$ 0
European Plants | Disposal Group, Disposed of by Sale, Not Discontinued Operations
Business Combination [Line Items]
Number of plants divested | plant			5
Proceeds from divestiture of businesses	$ 147	€ 125
Net (gains) losses on sales and impairments of businesses				(51)		(51)
DS Smith Plc
Business Combination [Line Items]
Number of IP shares issued for each DS Smith share (in shares) | shares			0.1285
Business combination, consideration transferred, equity interest, share issued, number of shares (in shares) | shares			178,126,631
Business combination, voting equity interest acquired, percentage			34.10%
Business combination, price per share (in dollars per share) | $ / shares			$ 55.63
Business combination, consideration transferred			$ 9,900
Business combination, acquisition-related cost, expense				3	17	90	22
Measurement period adjustment, increase in property, plant, and equipment				300
Measurement period adjustment, decease in intangibles				330
Measurement period adjustment, increase in goodwill				40
Business combination, acquiree's revenue since acquisition date, actual				2,100		3,500
Business combination, acquiree's earnings (loss) since acquisition date, actual				(82)		(189)
Business combination, pro forma information, pro forma income (loss), after tax				104	475	(16)	453
DS Smith Plc | Business Combination, Pro Forma Information, Nonrecurring Adjustment, Acquisition-Related Cost
Business Combination [Line Items]
Business combination, pro forma information, pro forma income (loss), after tax				$ 29	29
Business combination, integration-related cost, expense						94	94
DS Smith Plc | Additional Amortization Expense on Identifiable Assets
Business Combination [Line Items]
Business combination, pro forma information, pro forma income (loss), after tax					40	13	80
DS Smith Plc | Additional Depreciation Expense on Identifiable Assets
Business Combination [Line Items]
Business combination, pro forma information, pro forma income (loss), after tax					$ 40	13	80
DS Smith Plc | Business Combination, Pro Forma Information, Nonrecurring Adjustment, Inventory, Fair Value Adjustment
Business Combination [Line Items]
Business combination, pro forma information, pro forma income (loss), after tax						$ 70	$ 70