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Business Segment Information - Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 1,512 | $ 1,420 | $ 3,014 | $ 2,860
Operating income | 384 | 358 | 757 | 966
Corporate and Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (9) | (7) | (19) | (25)
Operating income | (122) | (112) | (235) | 23
Payments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 917 | 837 | 1,831 | 1,679
Payments | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 917 | 837 | 1,831 | 1,679
Operating income | 303 | 269 | 590 | 540
Payments | Corporate and Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Financial |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 604 | 590 | 1,202 | 1,206
Financial | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 604 | 590 | 1,202 | 1,206
Operating income | 203 | 201 | 402 | 403
Financial | Corporate and Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 0 | 0 | 0 | 0
Processing and services |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 1,328 | 1,207 | 2,621 | 2,445
Processing and services | Corporate and Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 14 | 13 | 27 | 16
Processing and services | Payments | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 744 | 665 | 1,470 | 1,318
Processing and services | Financial | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 570 | 529 | 1,124 | 1,111
Product |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 184 | 213 | 393 | 415
Product | Corporate and Other |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | (23) | (20) | (46) | (41)
Product | Payments | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | 173 | 172 | 361 | 361
Product | Financial | Operating segments |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Revenue | $ 34 | $ 61 | $ 78 | $ 95

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