Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Incentive Compensation Plans (Narrative) (Details)

v3.8.0.1
Stock-Based Incentive Compensation Plans (Narrative) (Details) - $ / shares
shares in Millions
3 Months Ended
Mar. 31, 2018
Apr. 01, 2017
Employee Stock Options    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock options, shares granted (in shares) 0.2  
Employee Stock Option, Grant 1    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Employee stock options, grant date fair value per share (in usd per share) $ 4.82  
Employee Stock Option, Grant 2    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Employee stock options, grant date fair value per share (in usd per share) $ 5.09  
Restricted Stock Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Restricted stock units, shares granted (in shares) 2.2 0.6
Restricted stock units, shares granted, weighted average grant date fair value (in usd per share) $ 12.17 $ 12.46
Performance-Based RSUs with Market Condition    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Stock units outstanding (in shares) 0.2  
Potential payout level 100.00%  
Performance-Based RSUs with Market Condition, Grant 1    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Grant date fair value per share (in usd per share) $ 12.88  
Performance-Based RSUs with Market Condition, Grant 2    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Grant date fair value per share (in usd per share) $ 13.48