Cash Flow Information - Schedule of Supplemental Cash Flow Information (Detail) - USD ($) $ in Millions	3 Months Ended
Mar. 26, 2021	Mar. 27, 2020
Non-cash activities:
Issuance of general partnership interests through partnership loans in current period	$ 211	$ 163
Repayment of partnership loans through distributions from partnership capital in current period	$ 114	$ 100

Amount of partnership loans repaid during the reporting period.

No definition available.

Name:	ck0000815917_RepaymentOfPartnershipLoans
Namespace Prefix:	ck0000815917_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration