Commitments and Contingencies (Tables)

3 Months Ended

Mar. 31, 2018

Commitments and Contingencies Disclosure [Abstract]

Management's estimate of the maximum potential exposure related to protection programs

The following table provides management's estimate of the maximum potential exposure related to our protection programs as of March 31, 2018 and December 31, 2017:

	March 31, 2018		December 31, 2017
	(In millions)
Maximum potential exposure	$	173,764	$	165,207

The following table provides the amount of allowance for transaction losses and negative customer balances related to ourprotection programs as of March 31, 2018 and December 31, 2017:

	March 31, 2018		December 31, 2017
	(In millions)
Allowance for transaction losses and negative customer balances	$	283	$	266