Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended	3 Months Ended
	Jun. 28, 2014	Dec. 27, 2014 Estimated amount for year 2014	Jun. 28, 2014 Foreign
Income Taxes [Line Items]
Income tax benefit as a result of release of valuation allowance			$ (4)
Unrecognized tax benefits decreased due to settlements	3
Increase in unrecognized tax benefits	4	11
Estimated increase in income tax expense		2
Increase in income tax expense	$ 1