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Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical) - USD ($)
$ in Millions
3 Months Ended
Apr. 02, 2017
Apr. 03, 2016
Statement of Comprehensive Income [Abstract]    
Foreign currency translation adjustments, tax expense (benefit) $ 0.1 $ 0.2
Unrealized gains (losses) on investments, tax expense (benefit) $ 8.6 $ (4.0)