Restructuring - Summary of Restructuring Activities (Detail) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 27, 2014	Sep. 28, 2013
Restructuring Cost and Reserve [Line Items]
Asset impairment charges	$ 0.9	$ 4.6
Accrual as of beginning of period	44.3
Restructuring charges	86.6
Utilization cash	(85.1)
Utilization non-cash	(0.1)
Accrual as of end of period	45.7
Employee termination benefits
Restructuring Cost and Reserve [Line Items]
Accrual as of beginning of period	38.7
Restructuring charges	72.9
Utilization cash	(71.0)
Utilization non-cash	0
Accrual as of end of period	40.6
Asset impairment charges
Restructuring Cost and Reserve [Line Items]
Accrual as of beginning of period	0
Utilization cash	0
Utilization non-cash	(0.1)
Accrual as of end of period	0
Contract termination costs
Restructuring Cost and Reserve [Line Items]
Accrual as of beginning of period	5.6
Restructuring charges	0.3
Utilization cash	(0.8)
Utilization non-cash	0
Accrual as of end of period	5.1
Other related costs
Restructuring Cost and Reserve [Line Items]
Accrual as of beginning of period	0
Restructuring charges	13.3
Utilization cash	(13.3)
Utilization non-cash	0
Accrual as of end of period	$ 0