Segment Information - Financial Information for Partnership's Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 29, 2024	Mar. 31, 2023
Net revenue:
Total net revenue	$ 3,794	$ 3,285
Pre-variable income:
Total pre-variable income	1,017	813
Variable compensation:
Total variable compensation	550	412
Income before allocations to partners:
Income before allocations to partners	467	401
United States [Member]
Net revenue:
Total net revenue	3,688	3,190
Pre-variable income:
Total pre-variable income	996	793
Variable compensation:
Total variable compensation	539	403
Income before allocations to partners:
Income before allocations to partners	457	390
Canada [Member]
Net revenue:
Total net revenue	106	95
Pre-variable income:
Total pre-variable income	21	20
Variable compensation:
Total variable compensation	11	9
Income before allocations to partners:
Income before allocations to partners	$ 10	$ 11