Nature of Operations and Basis of Presentation - Additional Information (Details)	3 Months Ended	12 Months Ended
	Jun. 30, 2018 T	Dec. 31, 2017 employee Segment
New Accounting Pronouncement Early Adoption [Line Items]
Date of incorporation		Jan. 25, 1999
Number of employees of PCA | employee		14,600
Number of reportable segments | Segment		3
Virgin Kraft Linerboard Machine | Scenario, Forecast
New Accounting Pronouncement Early Adoption [Line Items]
Production capacity of machine per year | T	400,000