EQUITY METHOD INVESTMENTS GPI Transactions (Details) $ in Millions		3 Months Ended		12 Months Ended
		Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2018
EQUITY METHOD INVESTMENTS GPI Transactions (Details) [Line Items]
Proceeds from sales of equity method investments, net of transaction costs				$ 472	$ 0	$ 908
Net (gains) losses on sales of equity method investments				0	(10)	204
Equity earnings (loss), net of taxes				(21)	(6)	2
Equity method dividends received				$ 13	$ 204	159
Graphic Packaging LLC [Member] | Reportable Subsegments [Member]
EQUITY METHOD INVESTMENTS GPI Transactions (Details) [Line Items]
Proceeds from sales of equity method investments, net of transaction costs		$ 403	$ 397
Payments for Other Taxes						310
Graphic Packaging LLC [Member] | Reportable Subsegments [Member]
EQUITY METHOD INVESTMENTS GPI Transactions (Details) [Line Items]
Equity method investments, aggregate units exchanged							79,911,591
Equity method investments, aggregate units exchanged and sold on open market		22,773,077	24,588,316
Net (gains) losses on sales of equity method investments		$ 64	$ 33
Gain (loss) on disposition of stock in subsidiary or equity method investee, net of tax		48	25
Gain related to tax receivable agreement	[1]	66	42
Gain related to tax receivable agreement, net of tax	[1]	$ 50	$ 31
Equity Method Investment, Ownership Percentage							20.50%
Equity earnings (loss), net of taxes						4
Equity method dividends received						$ 5

[1] The tax receivable agreement ("TRA") entitles the Company to 50% of the amount of any tax benefits projected to be realized by GPIP upon the Company's exchange of its units. The Company made income tax payments of $310 million in 2021 as a result of the monetization of its investment in GPIP.