Goodwill and Intangible Assets -Goodwill - Additional Information (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 31, 2022	Jun. 30, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill impairment charge	$ 0		$ 0	$ 0	$ 55,200,000
Goodwill	922,400,000		922,400,000	923,500,000	$ 863,500,000
Packaging
Goodwill [Line Items]
Goodwill	$ 922,400,000		$ 922,400,000	$ 923,500,000
Paper Reporting Unit
Goodwill [Line Items]
Goodwill impairment charge		$ 55,200,000