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Investments - (Tables) | 3 Months Ended
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Mar. 31, 2022
Investments, Debt and Equity Securities [Abstract] |
Schedule of available-for-sale securities | The amortized cost, gross unrealized gains, gross unrealized losses, and fair value of our AFS investments as of March 31, 2022 and December 31, 2021 are presented below:
| March 31, 2022 |  | December 31, 2021
(in millions) | Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value |  | Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value
Asset-backed securities | $ | 47 |  | $ | — |  | $ | (2) |  | $ | 45 |  |  | $ | 49 |  | $ | — |  | $ | — |  | $ | 49 |
Corporate bonds | 170 |  | — |  | (4) |  | 166 |  |  | 167 |  | 1 |  | (1) |  | 167 |
U.S. government agencies and government- sponsored agencies | 16 |  | — |  | (1) |  | 15 |  |  | 17 |  | — |  | — |  | 17 |
U.S. treasuries | 308 |  | — |  | (6) |  | 302 |  |  | 285 |  | 1 |  | (1) |  | 285 |
Certificate of deposit | 11 |  | — |  | — |  | 11 |  |  | 11 |  | — |  | — |  | 11 |
Other debt securities | 8 |  | — |  | — |  | 8 |  |  | 9 |  | — |  | — |  | 9 |
Total | $ | 560 |  | $ | — |  | $ | (13) |  | $ | 547 |  |  | $ | 538 |  | $ | 2 |  | $ | (2) |  | $ | 538 |
The gross proceeds from sales and maturities of AFS securities for the three months ended March 31, 2022 and March 31, 2021 are presented below. We had immaterial gross realized gains and losses from sales of investments for the three months ended March 31, 2022 and 2021.
| Three Months Ended March 31, |  |
(in millions) | 2022 | 2021 |  |  |
Gross proceeds from sales | $ | 22 |  | $ | 41 |  |  |  |
Gross proceeds from maturities | 50 |  | 43 |  |  |  |
Total | $ | 72 |  | $ | 84 |  |  |  |
Fair value of debt investments by contractual maturity | The fair value of debt investments by contractual maturity are shown below:
(in millions) |  | March 31, 2022 |
One year or less |  | $ | 233 |  |
Over one year through five years |  | 280 |  |
Over five years through ten years |  | 12 |  |
Over ten years |  | 22 |  |
Total fair value |  | $ | 547 |  |

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- Definition Tabular disclosure of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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