Subsequent Events	3 Months Ended
	Sep. 30, 2023
Subsequent Events [Abstract]
Subsequent Events	On October 18, 2023, the Company announced that it plans to permanently close its containerboard mill in Orange, Texas by the end of the year. The Company expects the closure to result in pre-tax noncash asset write-off and accelerated depreciation charges of approximately $395 million and pre-tax cash severance and other shutdown charges of approximately $55 million. The Company expects to record these charges in the fourth quarter of 2023. The Company also announced plans to permanently cease production on two of its pulp machines at its Riegelwood, North Carolina and Pensacola, Florida mills by the end of the year. The Company estimates that the machine shutdowns will result in pre-tax noncash asset write-off and accelerated depreciation charges of approximately $200 million and pre-tax cash severance and other shutdown charges of approximately $14 million. The Company expects to record these charges in the fourth quarter of 2023.