Schedule I - Condensed Statements of Income (Detail) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2020	Sep. 25, 2020	Jun. 26, 2020	Mar. 27, 2020	Dec. 31, 2019	Sep. 27, 2019	Jun. 28, 2019	Mar. 29, 2019	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net revenue:
Total revenue									$ 10,165	$ 9,526	$ 8,594
Interest expense									102	157	125
Net revenue	$ 2,720	$ 2,527	$ 2,325	$ 2,491	$ 2,493	$ 2,367	$ 2,319	$ 2,190	10,063	9,369	8,469
OPERATING EXPENSES
Compensation and benefits									7,186	6,538	5,993
Other operating expenses									244	424	334
Total operating expenses									8,778	8,277	7,479
Income before allocations to partners	$ 378	$ 316	$ 288	$ 303	$ 285	$ 281	$ 285	$ 241	1,285	1,092	990
Allocations to partners									(1,285)	(1,092)	(990)
NET INCOME									0	0	0
Parent Company [Member]
Net revenue:
Total revenue									3,138	2,504	1,091
Interest expense									93	94	67
Net revenue									3,045	2,410	1,024
OPERATING EXPENSES
Compensation and benefits									1,759	1,317	33
Other operating expenses									1	1	1
Total operating expenses									1,760	1,318	34
Income before allocations to partners									1,285	1,092	990
Allocations to partners									(1,285)	(1,092)	(990)
NET INCOME									0	0	0
Parent Company [Member] | Subsidiary Earnings [Member]
Net revenue:
Total revenue									1,271	1,064	970
Parent Company [Member] | Management Fee Income [Member]
Net revenue:
Total revenue									1,852	1,411	99
Parent Company [Member] | Other [Member]
Net revenue:
Total revenue									$ 15	$ 29	$ 22