Segment Information - Financial Information for Partnership's Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2019	Sep. 28, 2018	Sep. 27, 2019	Sep. 28, 2018
Net revenue:
Total net revenue	$ 2,367	$ 2,191	$ 6,876	$ 6,316
Pre-variable income:
Total pre-variable income	580	539	1,631	1,497
Variable compensation:
Total variable compensation	299	266	824	751
Income (loss) before allocations to partners:
Total income before allocations to partners	281	273	807	746
United States [Member]
Net revenue:
Total net revenue	2,306	2,131	6,697	6,141
Pre-variable income:
Total pre-variable income	575	534	1,620	1,487
Variable compensation:
Total variable compensation	293	261	806	734
Income (loss) before allocations to partners:
Total income before allocations to partners	282	273	814	753
Canada [Member]
Net revenue:
Total net revenue	61	60	179	175
Pre-variable income:
Total pre-variable income	5	5	11	10
Variable compensation:
Total variable compensation	6	5	18	17
Income (loss) before allocations to partners:
Total income before allocations to partners	$ (1)	$ 0	$ (7)	$ (7)