Reconciliation of Measure Of Division Operating Income to Consolidated Loss Before Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 28, 2014	Jun. 29, 2013	Jun. 28, 2014	Jun. 29, 2013
Segment Reporting Information [Line Items]
Operating income (loss)	$ (185)	$ (45)	$ (263)	$ (35)
Asset impairments	(22)	(4)	(72)	(10)
Merger, restructuring, and other operating expenses, net	(103)	(27)	(204)	(46)
Legal accrual	(80)		(80)
Unallocated expenses	(33)	(20)	(59)	(39)
Interest income	6		12
Interest expense	(16)	(17)	(41)	(33)
Other income (expense), net	(2)	8	(2)	13
Loss before income taxes	(197)	(54)	(294)	(55)
Operating Segments
Segment Reporting Information [Line Items]
Operating income (loss)	51	6	144	60
Operating Segments | Other
Segment Reporting Information [Line Items]
Operating income (loss)	$ 2		$ 8