Changes in Pension and Other Postretirement Benefit Obligations, Plan Assets and Funded Status (Detail) (North America, USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 27, 2014	Dec. 28, 2013	Dec. 29, 2012
Pension Benefits
Schedule of Defined Benefit Plan Change in Benefit Obligation [Line Items]
Obligation at beginning of period	$ 1,122	$ 1,135
Service cost	3
Interest cost	52	7
Actuarial (gain) loss	138	(12)
Benefits paid	(97)	(8)
Obligation at end of period	1,218	1,122
Fair value of plan assets at beginning of period	986	972
Actual return on plan assets	107	22
Employer contribution	43
Benefits paid	(97)	(8)
Fair value of plan assets at end of period	1,039	986
Net liability recognized at end of period	(179)	(136)
Other Benefits
Schedule of Defined Benefit Plan Change in Benefit Obligation [Line Items]
Obligation at beginning of period	17		17
Interest cost	1
Actuarial (gain) loss	1
Currency exchange rate change	(1)
Benefits paid	(1)
Obligation at end of period	17		17
Employer contribution	1
Benefits paid	(1)
Net liability recognized at end of period	$ (17)	$ (17)