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Subsequent Event	3 Months Ended
Subsequent Event	Mar. 31, 2018
Subsequent Event
Subsequent Event	17. Subsequent Event Effective April 1, 2018, American Express Centurion Bank and American Express Bank, FSB were merged to become American Express National Bank, regulated, supervised and examined by the Office of the Comptroller of the Currency. The merger did not have any impact on our consolidated financial position, results of operations or cash flows.