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Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Apr. 01, 2018
Apr. 02, 2017
Earnings (Loss) Per Share (Thousands of Dollars and Shares Except Per Share Data) [Abstract]    
Net earnings (loss) $ (112,492) $ 68,599
Basic [Abstract]    
Average shares outstanding (in shares) 125,073 125,182
Equivalent shares (basic) (in shares) 125,073 125,182
Net earnings (loss) per common share-basic (in dollars per share) $ (0.9) $ 0.55
Diluted [Abstract]    
Average shares outstanding (in shares) 125,073 125,182
Effect of dilutive securities:    
Options and other share-based awards (in shares) 0 2,047
Equivalent shares (diluted) (in shares) 125,073 127,229
Net earnings (loss) per common share-diluted (in dollars per share) $ (0.9) $ 0.54
Employee Stock Option and Restricted Stock Units [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Options to acquire shares totaling excluded as antidilutive 3,191 638
Dilutive securities excluded because of net loss 1,993  
Impact of dilutive securities excluded because of net loss 1,022