Business Events	3 Months Ended
Mar. 31, 2018
Business Combination Disclosure [Abstract]
Divestitures	2. Business Events During the first quarter of 2018, we acquired from Citibank, N.A. its existing Hilton Worldwide Holdings Inc. cobrand credit card loan portfolio (the acquired Hilton portfolio). The Hilton portfolio had an outstanding principal and interest balance of approximately $1 billion at acquisition. None of the credit card loans acquired were considered purchased credit impaired at acquisition date. The cash outflows related to this acquisition are reported within the investing section of the Consolidated Statements of Cash Flows as a net increase in Card Member receivables and loans.

Business Events

3 Months Ended

Mar. 31, 2018

Business Combination Disclosure [Abstract]

2. Business Events

During the first quarter of 2018, we acquired from Citibank, N.A. its existing Hilton Worldwide Holdings Inc. cobrand credit card loan portfolio (the acquired Hilton portfolio). The Hilton portfolio had an outstanding principal and interest balance of approximately $1 billion at acquisition. None of the credit card loans acquired were considered purchased credit impaired at acquisition date. The cash outflows related to this acquisition are reported within the investing section of the Consolidated Statements of Cash Flows as a net increase in Card Member receivables and loans.