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Partnership Capital - Roll Forward of Outstanding Partnership Loans (Detail) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2017
Jun. 24, 2016
Partners Capital Notes [Abstract]    
Partnership loans outstanding at beginning of period $ 266 $ 218
Partnership loans issued during the period 142 146
Repayment of Partnership loans during the period (93) (79)
Partnership loans outstanding at end of period $ 315 $ 285