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Commitments and Contingencies (Tables)
3 Months Ended
Mar. 31, 2021
Commitments and Contingencies Disclosure [Abstract]  
Management's estimate of the maximum potential exposure related to protection programs The following table shows changes in the allowance for transaction losses and negative customer balances related to our protection programs for the three months ended March 31, 2021 and 2020:
Three Months Ended March 31,
20212020
(in millions)
Beginning balance$414 $399 
Provision281 247 
Realized losses(347)(270)
Recoveries20 20 
Ending balance$368 $396