Accumulated Other Comprehensive (Loss) Income - Reclassifications Out of Accumulated Other Comprehensive (Loss) Income (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains and losses on derivative instruments, Total before taxes	$ (487.2)	$ (533.5)	$ (936.2)	$ (993.9)
Total before taxes			21.3	37.4
Tax (expense) or benefit	(1.7)	(3.9)	(2.2)	(4.3)
Net income	18.1	26.3	19.1	33.1
Gains and Losses on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains and losses on derivative instruments, Total before taxes	(0.3)	(0.2)	(0.4)	(0.1)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income	(0.4)		(0.5)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income [Member] | Gains and Losses on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before taxes	0.1		0.2
Tax (expense) or benefit
Net income	0.1		0.2
Reclassification Out of Accumulated Other Comprehensive (Loss) Income [Member] | Pension Benefit Plan Items [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Prior-service costs	(0.2)		(0.3)
Actuarial adjustments			(0.1)
Actuarial gains/(losses)	(0.1)		(0.1)
Total before taxes	(0.3)		(0.5)
Tax (expense) or benefit	(0.2)		(0.2)
Net income	(0.5)		(0.7)
Reclassification Out of Accumulated Other Comprehensive (Loss) Income [Member] | Foreign Currency Hedges [Member] | Gains and Losses on Derivative Instruments [Member]
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gains and losses on derivative instruments, Total before taxes	$ 0.1		$ 0.2