Contingencies and Legal Matters (Details)	12 Months Ended
	Dec. 31, 2018 person
Loss Contingencies [Line Items]
Number of regular full-time employees	2,641
Contract Expiration Period Within Twelve Months
Loss Contingencies [Line Items]
Number of regular full-time employees	113
United States
Loss Contingencies [Line Items]
Number of hourly employees	1,180
Number of salaried employees	580
Europe
Loss Contingencies [Line Items]
Number of hourly employees	434
Number of salaried employees	447
Whiting, WI | January 2018
Loss Contingencies [Line Items]
Number of regular full-time employees	211
Neenah, WI | May 2019
Loss Contingencies [Line Items]
Number of regular full-time employees	270
Munising, MI | April 2020
Loss Contingencies [Line Items]
Number of regular full-time employees	209
Appleton, WI | June 2021
Loss Contingencies [Line Items]
Number of regular full-time employees	113
Lowville, NY | November 2021
Loss Contingencies [Line Items]
Number of regular full-time employees	105
Salaried Workforce Subject To Collective Bargaining Arrangements | Unionized Employees Concentration Risk3 | Germany
Loss Contingencies [Line Items]
Percentage of concentration risk	50.00%
Hourly Workforce Subject to Collective Bargaining Arrangements | Unionized Employees Concentration Risk3 | Germany
Loss Contingencies [Line Items]
Percentage of concentration risk	80.00%