Segment Information - Financial Information for Partnership's Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2024	Jun. 30, 2023	Jun. 28, 2024	Jun. 30, 2023
Net revenue:
Total net revenue	$ 3,903	$ 3,374	$ 7,697	$ 6,659
Pre-variable income:
Total pre-variable income	1,061	884	2,078	1,697
Variable compensation:
Total variable compensation	591	474	1,141	886
Income before allocations to partners:
Income before allocations to partners	470	410	937	811
United States [Member]
Net revenue:
Total net revenue	3,793	3,279	7,481	6,469
Pre-variable income:
Total pre-variable income	1,035	863	2,031	1,656
Variable compensation:
Total variable compensation	578	462	1,117	865
Income before allocations to partners:
Income before allocations to partners	457	401	914	791
Canada [Member]
Net revenue:
Total net revenue	110	95	216	190
Pre-variable income:
Total pre-variable income	26	21	47	41
Variable compensation:
Total variable compensation	13	12	24	21
Income before allocations to partners:
Income before allocations to partners	$ 13	$ 9	$ 23	$ 20