Segment Information - Financial Information for Partnership's Reportable Segments (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 30, 2018	Mar. 31, 2017
Net revenue:
Total net revenue	$ 2,042	$ 1,797
Pre-variable income (loss):
Total pre-variable income	469	361
Variable compensation:
Total variable compensation	236	164
Income (loss) before allocations to partners:
Total income before allocations to partners	233	197
United States [Member]
Net revenue:
Total net revenue	1,984	1,749
Pre-variable income (loss):
Total pre-variable income	466	362
Variable compensation:
Total variable compensation	230	160
Income (loss) before allocations to partners:
Total income before allocations to partners	236	202
Canada [Member]
Net revenue:
Total net revenue	58	48
Pre-variable income (loss):
Total pre-variable income	3	(1)
Variable compensation:
Total variable compensation	6	4
Income (loss) before allocations to partners:
Total income before allocations to partners	$ (3)	$ (5)