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BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Thousands | 3 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 USD ($) | Dec. 31, 2024 USD ($) segment shares | Dec. 31, 2023 USD ($) shares | Dec. 31, 2022 USD ($) shares | Aug. 08, 2022
Product Information [Line Items] |  |  |  |  |
Number of reportable segments | segment |  | 2 |  |  |
Cash available for general purposes |  | $ 1,067,500 | $ 703,300 |  |
Allowance for credit losses |  | 24,700 | 19,000 |  |
Credit loss expense related to accounts receivable |  | 25,000 | 23,300 | $ 15,000 |
Allowance for credit losses related to settlement processing assets |  | 10,000 | 9,700 |  |
Credit loss expense related to settlement processing assets |  | 22,400 | 19,200 | 13,000 |
Impairment of goodwill |  | $ 0 | 0 | $ 833,075 |
Hosting arrangement, service contract, implementation cost, impairment, statement of income or comprehensive income [extensible enumeration] |  | Selling, general and administrative |  |  |
Equity method investments |  | $ 999,300 | $ 989,600 |  |
Aggregate principal amount |  | $ 16,326,073 |  |  |
Antidilutive securities excluded from computation of earnings per share (in shares) | shares |  | 293,422 | 191,353 | 700,119 |
Convertible Debt |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Aggregate principal amount |  | $ 1,500,000 |  |  |
1.500% Convertible Senior Notes Due March 01, 2031 | Convertible Debt |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Aggregate principal amount |  | $ 2,000,000 |  |  |
Stated interest rate (as a percent) |  | 1.50% |  |  |
1.000% convertible notes due August 15, 2029 | Convertible Debt |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  | 1.00%
CUP Data |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Ownership interest in equity method investment (as a percent) |  | 45.00% |  |  |
Notes Receivable |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Allowance for credit losses and a noncash charge |  |  | $ 15,200 |  |
Allowance for credit losses |  | $ 15,200 | 15,200 |  |
Held-for-sale | Consumer Business |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Impairment of goodwill | $ 833,100 |  |  |  |
Internal-Use Software |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Capitalized implementation costs, net of accumulated amortization |  | 215,400 | 206,500 |  |
Amortization expense of capitalized implementation costs |  | 7,600 | $ 3,800 | $ 3,100 |
Acquired technologies |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Impairment of implementation cost |  | $ 28,500 |  |  |
Minimum |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Amortization period of capitalized contract costs |  | 3 years |  |  |
Minimum | Internal-Use Software |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Estimated useful life |  | 5 years |  |  |
Maximum |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Amortization period of capitalized contract costs |  | 7 years |  |  |
Maximum | Internal-Use Software |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Estimated useful life |  | 10 years |  |  |
Cash and Cash Equivalents | Financial Institution Concentration Risk | Eight Financial Institutions |  |  |  |  |
Product Information [Line Items] |  |  |  |  |
Percentage of total consolidated revenues from external customers |  | 75.00% |  |  |

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