Segment Information - Financial Information for Partnership's Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2020	Sep. 27, 2019	Sep. 25, 2020	Sep. 27, 2019
Net revenue:
Total net revenue	$ 2,527	$ 2,367	$ 7,343	$ 6,876
Pre-variable income:
Total pre-variable income	692	580	1,911	1,631
Variable compensation:
Total variable compensation	376	299	1,004	824
Income (loss) before allocations to partners:
Total income before allocations to partners	316	281	907	807
United States [Member]
Net revenue:
Total net revenue	2,469	2,306	7,153	6,697
Pre-variable income:
Total pre-variable income	689	575	1,894	1,620
Variable compensation:
Total variable compensation	369	293	983	806
Income (loss) before allocations to partners:
Total income before allocations to partners	320	282	911	814
Canada [Member]
Net revenue:
Total net revenue	58	61	190	179
Pre-variable income:
Total pre-variable income	3	5	17	11
Variable compensation:
Total variable compensation	7	6	21	18
Income (loss) before allocations to partners:
Total income before allocations to partners	$ (4)	$ (1)	$ (4)	$ (7)