Schedule I - Condensed Statements of Income (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 28, 2018	Jun. 29, 2018	Mar. 30, 2018	Dec. 31, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Net revenue:
Total revenue									$ 8,594	$ 7,597	$ 6,632
Interest expense									125	91	75
Net revenue	$ 2,153	$ 2,191	$ 2,083	$ 2,042	$ 1,975	$ 1,852	$ 1,882	$ 1,797	8,469	7,506	6,557
OPERATING EXPENSES
Compensation and benefits									5,993	5,299	4,606
Other operating expenses									334	278	252
Total operating expenses									7,479	6,634	5,811
Income before allocations to partners	$ 244	$ 273	$ 240	$ 233	$ 239	$ 211	$ 225	$ 197	990	872	746
Allocations to partners									(990)	(872)	(746)
NET INCOME									0	0	0
Parent Company [Member]
Net revenue:
Total revenue									1,091	972	848
Interest expense									67	67	68
Net revenue									1,024	905	780
OPERATING EXPENSES
Compensation and benefits									33	31	32
Other operating expenses									1	2	2
Total operating expenses									34	33	34
Income before allocations to partners									990	872	746
Allocations to partners									(990)	(872)	(746)
NET INCOME									0	0	0
Parent Company [Member] | Subsidiary Earnings [Member]
Net revenue:
Total revenue									970	858	738
Parent Company [Member] | Management Fee Income [Member]
Net revenue:
Total revenue									99	99	100
Parent Company [Member] | Other [Member]
Net revenue:
Total revenue									$ 22	$ 15	$ 10