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Stock and Incentive Programs for Employees and Directors - Schedule of Nonvested Performance Share Units Activity (Detail)
shares in Thousands
12 Months Ended
Dec. 31, 2021
$ / shares
shares
Performance share units  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Nonvested at beginning of period, Shares | shares 2,076
Granted, Shares | shares 850
Performance adjustment, Shares | shares 649
Vested, Shares | shares (3,291)
Forfeited, Shares | shares (107)
Nonvested at end of period, Shares | shares 177
Nonvested at beginning of period, Weighted-Average Grant Date Fair Value | $ / shares $ 3.94
Granted, Weighted-Average Grant Date Fair Value | $ / shares 4.52
Performance adjustment, Wei | $ / shares 3.11
Vested, Weighted-Average Grant Date Fair Value | $ / shares 3.99
Forfeited, Weighted-Average Grant Date Fair Value | $ / shares 3.61
Nonvested at end of period, Weighted-Average Grant Date Fair Value | $ / shares $ 2.93
Phantom Stock Units  
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]  
Nonvested at beginning of period, Shares | shares 4,603
Granted, Shares | shares 1,719
Performance adjustment, Shares | shares 208
Vested, Shares | shares (3,465)
Forfeited, Shares | shares (708)
Nonvested at end of period, Shares | shares 2,357
Nonvested at beginning of period, Weighted-Average Grant Date Fair Value | $ / shares $ 3.25
Granted, Weighted-Average Grant Date Fair Value | $ / shares 3.26
Performance adjustment, Wei | $ / shares 3.54
Vested, Weighted-Average Grant Date Fair Value | $ / shares 3.27
Forfeited, Weighted-Average Grant Date Fair Value | $ / shares 3.22
Nonvested at end of period, Weighted-Average Grant Date Fair Value | $ / shares $ 3.26