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Financial Instruments - Other Comprehensive Income (Loss) (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 27, 2015
Jun. 28, 2014
Jun. 27, 2015
Jun. 28, 2014
Fair Value Disclosures [Abstract]        
(Losses) gains recognized in accumulated other comprehensive loss $ (12.6) $ 7.3 $ (9.2) $ 10.5
Losses (gains) reclassified from accumulated other comprehensive loss 7.2 (3.5) 11.9 (4.5)
Comprehensive income (loss) $ (5.4) $ 3.8 $ 2.7 $ 6.0