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Schedule II - Valuation and Qualifying Accounts | 12 Months Ended
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Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] |
Schedule II - Valuation and Qualifying Accounts | Fiserv, Inc. Schedule II — Valuation and Qualifying Accounts (In millions)
|  |  |  | Additions |  |  |  |
Description |  | Balance at Beginning of Period |  | Charged to Costs and Expenses |  | Charged to Other Accounts |  | Deductions |  | Balance at End of Period
Year ended December 31, 2021 |  |  |  |  |  |  |  |  |  |
Deferred tax asset valuation allowance |  | $ | 888 |  |  | 13 |  |  | (127) |  | (2) | (77) |  | (2) | $ | 697 |
Year ended December 31, 2020 |  |  |  |  |  |  |  |  |  |
Deferred tax asset valuation allowance |  | $ | 1,145 |  |  | 6 |  |  | 64 |  |  | (327) |  | (2) | $ | 888 |
Year ended December 31, 2019 |  |  |  |  |  |  |  |  |  |
Deferred tax asset valuation allowance (1) |  | $ | 101 |  |  | 8 |  |  | 1,036 |  |  | — |  |  | $ | 1,145 |
(1)Includes the valuation allowance adjustment associated with the acquisition of First Data. (2)The decrease in the deferred tax asset valuation allowance is primarily due to subsidiary restructurings.

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- Definition The entire disclosure for valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Subsection 09 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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