Segment Information - Financial Information for Partnership's Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 29, 2017	Sep. 30, 2016	Sep. 29, 2017	Sep. 30, 2016
Net revenue:
Total net revenue	$ 1,852	$ 1,683	$ 5,531	$ 4,904
Pre-variable income (loss):
Total pre-variable income	425	359	1,224	1,113
Variable compensation:
Total variable compensation	214	173	591	528
Income (loss) before allocations to partners:
Total income before allocations to partners	211	186	633	585
United States [Member]
Net revenue:
Total net revenue	1,805	1,638	5,387	4,775
Pre-variable income (loss):
Total pre-variable income	427	358	1,225	1,115
Variable compensation:
Total variable compensation	208	169	577	517
Income (loss) before allocations to partners:
Total income before allocations to partners	219	189	648	598
Canada [Member]
Net revenue:
Total net revenue	47	45	144	129
Pre-variable income (loss):
Total pre-variable income	(2)	1	(1)	(2)
Variable compensation:
Total variable compensation	6	4	14	11
Income (loss) before allocations to partners:
Total income before allocations to partners	$ (8)	$ (3)	$ (15)	$ (13)