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Basis of Presentation (Tables) | 12 Months Ended
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Dec. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
Schedule of Error Corrections and Prior Period Adjustments | The impact to the Consolidated Statements of Cash Flows previously filed in Annual Reports on Form 10-K is as follows (in millions):
| Year Ended December 31, 2020 |  | Year Ended December 31, 2019
| As Reported | Effect of Change | As Revised |  | As Reported | Effect of Change | As Revised
Cash provided by operating activities | $ | 2,783 |  | $ | — |  | $ | 2,783 |  |  | $ | 1,835 |  | $ | — |  | $ | 1,835 |
Cash used for investing activities | (679) |  | — |  | (679) |  |  | (229) |  | — |  | (229) |
Cash provided by (used for) financing activities | (2,088) |  | 316 |  | (1,772) |  |  | (1,493) |  | 1,246 |  | (247) |
Effect of exchange rates on cash and cash equivalents and funds held on behalf of clients | 78 |  | 219 |  | 297 |  |  | 21 |  | 42 |  | 63 |
Net increase in cash and cash equivalents and funds held on behalf of clients | 94 |  | 535 |  | 629 |  |  | 134 |  | 1,288 |  | 1,422 |
Cash and cash equivalents and funds held on behalf of clients at beginning of year | 790 |  | 5,154 |  | 5,944 |  |  | 656 |  | 3,866 |  | 4,522 |
Cash and cash equivalents and funds held on behalf of clients at end of year | $ | 884 |  | $ | 5,689 |  | $ | 6,573 |  |  | $ | 790 |  | $ | 5,154 |  | $ | 5,944 |
The impact to the Consolidated Statements of Cash Flows previously filed in unaudited Quarterly Reports on Form 10-Q is as follows (in millions):
| Three Months Ended March 31, 2021 |  | Six Months Ended June 30, 2021 |  | Nine Months Ended September 30, 2021
| As Reported | Effect of Change | As Revised |  | As Reported | Effect of Change | As Revised |  | As Reported | Effect of Change | As Revised
Cash provided by operating activities | $ | 561 |  | $ | — |  | $ | 561 |  |  | $ | 1,345 |  | $ | — |  | $ | 1,345 |  |  | $ | 1,251 |  | $ | — |  | $ | 1,251 |
Cash provided by (used for) investing activities | 102 |  | — |  | 102 |  |  | (27) |  | — |  | (27) |  |  | (116) |  | — |  | (116) |
Cash provided by (used for) financing activities | (709) |  | 28 |  | (681) |  |  | (1,122) |  | 386 |  | (736) |  |  | (1,380) |  | 786 |  | (594) |
Effect of exchange rates on cash and cash equivalents and funds held on behalf of clients | (16) |  | (18) |  | (34) |  |  | 11 |  | 18 |  | 29 |  |  | (30) |  | (63) |  | (93) |
Net increase (decrease) in cash and cash equivalents and funds held on behalf of clients | (62) |  | 10 |  | (52) |  |  | 207 |  | 404 |  | 611 |  |  | (275) |  | 723 |  | 448 |
Cash and cash equivalents and funds held on behalf of clients at beginning of year | 884 |  | 5,689 |  | 6,573 |  |  | 884 |  | 5,689 |  | 6,573 |  |  | 884 |  | 5,689 |  | 6,573 |
Cash and cash equivalents and funds held on behalf of clients at end of year | $ | 822 |  | $ | 5,699 |  | $ | 6,521 |  |  | $ | 1,091 |  | $ | 6,093 |  | $ | 7,184 |  |  | $ | 609 |  | $ | 6,412 |  | $ | 7,021 |

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- Definition Tabular disclosure of prior period adjustments to previously issued financial statements including (1) the effect of the correction on each financial statement line item and any per-share amounts affected for each prior period presented (2) the cumulative effect of the change on retained earnings or other appropriate components of equity or net assets in the statement of financial position, as of the beginning of the earliest period presented, and (3) the effect of the prior period adjustments (both gross and net of applicable income tax) on the net income of each prior period presented in the entity's annual report for the year in which the adjustments are made. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22663-107794 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22644-107794 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 250 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=124431687&loc=d3e22658-107794 + Details
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