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Reserves for Losses (Tables)
9 Months Ended
Sep. 30, 2019
Reserves for Losses [Abstract]  
Changes in Card Member Receivable Reserve for Losses
The following table presents changes in the Card Member receivables reserve for losses for the nine months ended September 30:
(Millions)20192018
Balance, January 1$167  $145  
Provisions160  186  
Other credits (a)
13  51  
Net write-offs (b)
(166) (173) 
Other debits (c)
(6) (26) 
Balance, September 30$168  $183  

(a)Primarily reserve balances related to new groups of, and participation interests in, Card Member receivables purchased from affiliates, totaling $2.7 billion and $9.7 billion for the nine months ended September 30, 2019 and 2018, respectively.
(b)Net of recoveries of $94 million and $84 million for the nine months ended September 30, 2019 and 2018, respectively.
(c)Primarily reserve balances related to participation interests in Card Member receivables sold to an affiliate. Participation interests in Card Member receivables sold totaled $1.1 billion and $4.5 billion for the nine months ended September 30, 2019 and 2018, respectively.
Changes in the Card Member Loans Reserve for Losses
The following table presents changes in the Card Member loans reserve for losses for the nine months ended September 30:
(Millions)20192018
Balance, January 1$ $ 
Provisions10   
Net write-offs (a)
(7) (4) 
Balance, September 30$ $ 

(a)Net of recoveries of $1.0 million for both the nine months ended September 30, 2019 and 2018.