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Financial Instruments and Fair Value Measurements | 6 Months Ended
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Jun. 30, 2022
Fair Value Disclosures [Abstract] |
FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS | FINANCIAL INSTRUMENTS AND FAIR VALUE MEASUREMENTS The following tables summarize our financial instruments by significant categories and fair value measurement on a recurring basis as of June 30, 2022 and December 31, 2021 and the amortized cost, gross unrealized gains, gross unrealized losses, fair value of our AFS investments:
(in millions) | Fair Value Level | Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value | Cash and Cash Equivalents | Investments | Restricted Cash, Cash Equivalents and Investments
June 30, 2022 |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |
Money market mutual funds | Level 1 | $ | 228 |  | $ | — |  | $ | — |  | $ | 228 |  | $ | 139 |  | $ | — |  | $ | 89 |
U.S. treasuries | Level 2 | 42 |  | — |  | — |  | 42 | 42 |  | — |  | — |
Total cash equivalents |  | 270 |  | — |  | — |  | 270 | 181 |  | — |  | 89 |
AFS Investments: |  |  |  |  |  |  |  |
Asset-backed securities | Level 2 | 46 |  | — |  | (2) |  | 44 |  | — |  | 44 |  | — |
Corporate bonds | Level 2 | 163 |  | — |  | (5) |  | 158 |  | — |  | 128 |  | 30 |
Agency securities | Level 2 | 23 |  | — |  | (1) |  | 22 |  | — |  | 4 |  | 18 |
U.S. treasuries | Level 2 | 271 |  | — |  | (8) |  | 263 |  | — |  | 94 |  | 169 |
Certificate of deposit | Level 2 | 9 |  | — |  | — |  | 9 |  | — |  |  | 9 |
Other debt securities | Level 2 | 9 |  | — |  | — |  | 9 |  | — |  | 9 |  | — |
Total AFS Investments |  | $ | 521 |  | $ | — |  | $ | (16) |  | $ | 505 |  | $ | — |  | $ | 279 |  | $ | 226 |
(in millions) | Fair Value Level | Amortized Cost | Gross Unrealized Gains | Gross Unrealized Losses | Fair Value | Cash and Cash Equivalents | Investments | Restricted Cash, Cash Equivalents and Investments
December 31, 2021 |  |  |  |  |  |  |  |
Cash equivalents: |  |  |  |  |  |  |  |
Money market mutual funds | Level 1 | $ | 97 |  | $ | — |  | $ | — |  | $ | 97 |  | $ | 4 |  | $ | — |  | $ | 93 |
U.S. treasuries | Level 2 | 22 |  | — |  | — |  | 22 | 21 |  | — |  | 1 |
Total cash equivalents |  | 119 |  | — |  | — |  | 119 | 25 |  | — |  | 94 |
AFS Investments: |  |  |  |  |  |  |  |
Asset-backed securities | Level 2 | 49 |  | — |  | — |  | 49 |  | — |  | 49 |  | — |
Corporate bonds | Level 2 | 167 |  | 1 |  | (1) |  | 167 |  | — |  | 137 |  | 30 |
Agency securities | Level 2 | 17 |  | — |  | — |  | 17 |  | — |  | 2 |  | 15 |
U.S. treasuries | Level 2 | 285 |  | 1 |  | (1) |  | 285 |  | — |  | 106 |  | 179 |
Certificate of deposit | Level 2 | 11 |  | — |  | — |  | 11 |  | — |  | — |  | 11 |
Other debt securities | Level 2 | 9 |  | — |  | — |  | 9 |  | — |  | 9 |  | — |
Total AFS Investments |  | $ | 538 |  | $ | 2 |  | $ | (2) |  | $ | 538 |  | $ | — |  | $ | 303 |  | $ | 235 |
As of June 30, 2022, gross unrealized losses related to AFS investments in an unrealized loss position greater than 12 months were immaterial. Gross unrealized losses were immaterial at December 31, 2021. Fair Value of Financial Instruments We use an independent pricing source to determine the fair value of our securities. The independent pricing source utilizes various pricing models for each asset class, including the market approach. The inputs and assumptions for the pricing models are market observable inputs including trades of comparable securities, dealer quotes, credit spreads, yield curves and other market-related data. We have not adjusted the prices obtained from the independent pricing service and we believe the prices received from the independent pricing service are representative of the prices that would be received to sell the assets at the measurement date (exit price). The carrying value of the Company's cash equivalents and restricted cash equivalents approximate their fair values due to their short-term maturities. We did not have any Level 3 financial instruments recognized in our balance sheet as of June 30, 2022 and December 31, 2021. There were no transfers between levels as of June 30, 2022 and December 31, 2021. Unrealized Losses on AFS Investments As of June 30, 2022, gross unrealized losses related to AFS investments in an unrealized loss position for greater than 12 months were immaterial. Gross unrealized losses were immaterial at December 31, 2021. Unrealized losses on fixed income securities are principally caused by changes in market interest rates and the financial condition of the issuer. In analyzing an issuer's financial condition, we consider whether the securities are issued by the federal government or its agencies, whether downgrades by credit rating agencies have occurred, and industry analysts' reports. As we believe substantially all of the unrealized losses are driven by changes in market interest rates and we have the ability to hold these investments until maturity, or for the foreseeable future, no impairment charges were deemed necessary. Actual maturities may differ from contractual maturities because borrowers may have the right to prepay obligations with or without prepayment penalties. Sales and Maturities The fair value of debt investments by contractual maturity are shown below:
(in millions) |  | June 30, 2022 |
One year or less |  | $ | 184 |  |
Over one year through five years |  | 284 |  |
Over five years through ten years |  | 11 |  |
Over ten years |  | 26 |  |
Total fair value |  | $ | 505 |  |
The gross proceeds from sales and maturities of AFS securities for the three and six months ended June 30, 2022 and June 30, 2021 are presented below. We had immaterial gross realized gains and losses from sales of investments for the three and six months ended June 30, 2022 and 2021.
| Three Months Ended June 30, |  | Six Months Ended June 30,
(in millions) | 2022 | 2021 |  | 2022 | 2021
Gross proceeds from sales | $ | 21 |  | $ | 39 |  |  | $ | 43 |  | $ | 80 |
Gross proceeds from maturities | 83 |  | 32 |  |  | 132 |  | 75 |
Total | $ | 104 |  | $ | 71 |  |  | $ | 175 |  | $ | 155 |
Fair Value of Long-Term Debt The fair value of our 2029 Notes was obtained from a third-party pricing service and is based on observable market inputs. As such, the fair value of the senior notes is considered Level 2 in the hierarchy for fair value measurement. As of June 30, 2022, our 2029 Notes were carried at their cost, net of issuance costs, and had a fair value of $412 million and $500 million as of June 30, 2022 and December 31, 2021, respectively.

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- Definition The entire disclosure for financial instruments. This disclosure includes, but is not limited to, fair value measurements of short and long term marketable securities, international currencies forward contracts, and auction rate securities. Financial instruments may include hedging and non-hedging currency exchange instruments, derivatives, securitizations and securities available for sale at fair value. Also included are investment results, realized and unrealized gains and losses as well as impairments and risk management disclosures. + References No definition available. + Details
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