Schedule I - Condensed Statements of Income (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 29, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 24, 2016	Mar. 25, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Net revenue:
Other									$ 60	$ 34	$ 22
Total revenue									7,597	6,632	6,694
Interest expense									91	75	75
Net revenue	$ 1,975	$ 1,852	$ 1,882	$ 1,797	$ 1,653	$ 1,683	$ 1,660	$ 1,561	7,506	6,557	6,619
OPERATING EXPENSES
Compensation and benefits									5,299	4,606	4,641
Other operating expenses									278	252	265
Total operating expenses									6,634	5,811	5,781
Income before allocations to partners	$ 239	$ 211	$ 225	$ 197	$ 161	$ 186	$ 208	$ 191	872	746	838
Allocations to partners									(872)	(746)	(838)
Net income									0	0	0
Parent Company [Member]
Net revenue:
Subsidiary earnings									858	738	833
Management fee income									99	100	99
Other									15	10	7
Total revenue									972	848	939
Interest expense									67	68	69
Net revenue									905	780	870
OPERATING EXPENSES
Compensation and benefits									31	32	30
Other operating expenses									2	2	2
Total operating expenses									33	34	32
Income before allocations to partners									872	746	838
Allocations to partners									(872)	(746)	(838)
Net income									$ 0	$ 0	$ 0