Segment Information - Financial Information for Partnership's Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2019	Mar. 30, 2018
Net revenue:
Total net revenue	$ 2,190	$ 2,042
Pre-variable income (loss):
Total pre-variable income	487	469
Variable compensation:
Total variable compensation	246	236
Income (loss) before allocations to partners:
Total income before allocations to partners	241	233
United States [Member]
Net revenue:
Total net revenue	2,135	1,984
Pre-variable income (loss):
Total pre-variable income	488	466
Variable compensation:
Total variable compensation	240	230
Income (loss) before allocations to partners:
Total income before allocations to partners	248	236
Canada [Member]
Net revenue:
Total net revenue	55	58
Pre-variable income (loss):
Total pre-variable income	(1)	3
Variable compensation:
Total variable compensation	6	6
Income (loss) before allocations to partners:
Total income before allocations to partners	$ (7)	$ (3)