Segment Information - Financial Information for Partnership's Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2019	Jun. 29, 2018	Jun. 28, 2019	Jun. 29, 2018
Net revenue:
Total net revenue	$ 2,319	$ 2,083	$ 4,509	$ 4,125
Pre-variable income:
Total pre-variable income	564	489	1,051	958
Variable compensation:
Total variable compensation	279	249	525	485
Income (loss) before allocations to partners:
Total income before allocations to partners	285	240	526	473
United States [Member]
Net revenue:
Total net revenue	2,256	2,026	4,391	4,010
Pre-variable income:
Total pre-variable income	557	487	1,045	953
Variable compensation:
Total variable compensation	273	243	513	473
Income (loss) before allocations to partners:
Total income before allocations to partners	284	244	532	480
Canada [Member]
Net revenue:
Total net revenue	63	57	118	115
Pre-variable income:
Total pre-variable income	7	2	6	5
Variable compensation:
Total variable compensation	6	6	12	12
Income (loss) before allocations to partners:
Total income before allocations to partners	$ 1	$ (4)	$ (6)	$ (7)