BUSINESS SEGMENT INFORMATION Operating Profit by Industry Segment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Sales	$ 6,767	$ 4,734	$ 12,668	$ 9,353
Cost of products sold	4,876	3,360	9,135	6,784
Selling and administrative expenses	578	453	1,108	811
Depreciation and amortization	480	261	1,051	539
Distribution expenses	578	379	1,061	770
Interest Expense, net	107	55	188	101
Adjustment for less than wholly owned subsidiaries	0	(1)	(1)	(3)
Corporate expenses, net	19	23	27	47
Net special items	35	49	284	77
Non-operating pension expense (income)	(5)	(10)	(2)	(22)
Earnings (Loss) Before Income Taxes and Equity Earnings (Loss)	116	206	(19)	291
Restructuring charges, net	39	0	122	3
Gain on disposition of business	51	0	51	0
Gain on sale of fixed assets	0	5	67	0
Other nonrecurring (income) expense	24		41
DS Smith Plc
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Business combination, transactions costs	55		276
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Sales	6,779	4,673	12,674	9,211
Business Segment Operating Profit (Loss)	272	322	477	491
Corporate and Intrasegment Sales
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Sales	(12)	61	(6)	142
Packaging Solutions North America | Red River Containerboard Mill
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges, net	7		85
Packaging Solutions North America | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Sales	3,860	3,628	7,562	7,114
Cost of products sold	2,695	2,538	5,264	5,026
Selling and administrative expenses	340	316	622	600
Depreciation and amortization	236	186	649	389
Distribution expenses	281	281	547	569
Other segment items	31	26	61	57
Business Segment Operating Profit (Loss)	277	281	419	473
Packaging Solutions EMEA | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Sales	2,291	328	3,841	676
Cost of products sold	1,699	252	2,846	512
Selling and administrative expenses	154	25	247	50
Depreciation and amortization	195	16	302	32
Distribution expenses	235	23	386	45
Other segment items	9	2	15	3
Business Segment Operating Profit (Loss)	(1)	10	45	34
Global Cellulose Fibers | Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Net Sales	628	717	1,271	1,421
Cost of products sold	457	483	917	1,033
Selling and administrative expenses	56	61	98	119
Depreciation and amortization	49	59	100	113
Distribution expenses	63	75	129	157
Other segment items	7	8	14	15
Business Segment Operating Profit (Loss)	$ (4)	$ 31	$ 13	$ (16)