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Earnings Per Share (Details) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2017
Oct. 01, 2016
Sep. 30, 2017
Oct. 01, 2016
Weighted-average shares outstanding for basic and diluted EPS        
Basic weighted-average shares outstanding 264,624 270,560 267,409 270,703
Dilutive effect of stock options 2,365 1,539 2,325 1,348
Diluted weighted-average shares outstanding 266,989 272,099 269,734 272,051
Anti-dilutive effect of weighted average shares 1,500 3,500 1,200 3,600