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Non-Interest Revenue and Expense Detail (Tables) | 9 Months Ended
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Sep. 30, 2018
Other Cost And Expense Disclosure Operating (Tables) [Abstract] |
Details of other commissions and fees | The following is a detail of Other fees and commissions:
|  |  |  |  | Three Months Ended |  |  | Nine Months Ended
|  |  |  |  | September 30, |  |  | September 30,
(Millions) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Fees charged to Card Members: |  |  |  |  |  |  |  |  |  |  |  |
| Delinquency fees |  | $ | 238 |  | $ | 221 |  | $ | 712 |  | $ | 653
| Foreign currency conversion fee revenue |  |  | 233 |  |  | 219 |  |  | 691 |  |  | 630
Other customer fees: |  |  |  |  |  |  |  |  |  |  |  |
| Loyalty coalition-related fees |  |  | 120 |  |  | 116 |  |  | 338 |  |  | 332
| Travel commissions and fees |  |  | 104 |  |  | 91 |  |  | 315 |  |  | 273
| Service fees and other(a) |  |  | 103 |  |  | 108 |  |  | 309 |  |  | 324
| Total Other fees and commissions |  | $ | 798 |  | $ | 755 |  | $ | 2,365 |  | $ | 2,212
Other includes Membership Rewards program fees that are not related to contracts with customers.
Details of other revenues | The following is a detail of Other revenues:
|  |  |  | Three Months Ended |  | Nine Months Ended
|  |  |  | September 30, |  | September 30,
(Millions) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Global Network Services partner revenues |  | $ | 62 |  | $ | 82 |  | $ | 207 |  | $ | 261
Other(a) |  |  | 272 |  |  | 290 |  |  | 853 |  |  | 851
| Total Other revenues |  | $ | 334 |  | $ | 372 |  | $ | 1,060 |  | $ | 1,112
Other includes revenues arising from net revenue earned on cross-border Card Member spending, merchant-related fees, insurance premiums earned from Card Member travel and other insurance programs, prepaid card and Travelers Cheque-related revenues, earnings from equity method investments (including the GBT JV), and other miscellaneous revenue and fees.
Detail of other, net expense | The following is a detail of Other expenses:
|  | Three Months Ended |  | Nine Months Ended
|  | September 30, |  | September 30,
(Millions) |  | 2018 |  | 2017 |  | 2018 |  | 2017
Occupancy and equipment |  | $ | 489 |  | $ | 567 |  | $ | 1,493 |  | $ | 1,525
Professional services |  |  | 489 |  |  | 494 |  |  | 1,454 |  |  | 1,506
Other(a) |  |  | 382 |  |  | 398 |  |  | 1,160 |  |  | 1,144
Total Other expenses |  | $ | 1,360 |  | $ | 1,459 |  | $ | 4,107 |  | $ | 4,175
For all periods, O ther expense includes general operating expenses, communication expenses, Card and merchant-related fraud losses, foreign currency-related ga ins and losses, and gains on the sale of equity investments. For the nine months ended September 30, 2018, Other expense also includes the loss on a transaction involving the operations of our prepaid reloa dable and gift card business. For both the three and nine month periods, O ther expense also includes, for the current year, gains on the re-measur ement of certain equity investm ents previously carried at cost, and for the prior year, charges related to our U.S. loyalty coalition and prepaid businesses.

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