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Marketable and Other Securities | 12 Months Ended
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Dec. 31, 2018
Marketable Securities [Abstract] |
Marketable and Other Securities | Marketable and Other Securities The following table summarizes the fair value of cash equivalents and marketable debt and equity securities which approximates cost:
| Fair Value Level |  | December 31, 2018 |  | December 31, 2017
Cash and cash equivalents |  |  |  |  |
Cash and time deposits(a) |  |  | $ | 7,254 |  |  | $ | 6,962 |
Available-for-sale debt securities |  |  |  |  |
U.S. government and agencies | 2 |  | 4,656 |  |  | 750 |
Corporate debt | 2 |  | 3,791 |  |  | 3,032 |
Sovereign debt | 2 |  | 1,976 |  |  | 1,954 |
Total available-for-sale debt securities – cash equivalents |  |  | 10,423 |  |  | 5,736 |
Money market funds | 1 |  | 3,167 |  |  | 2,814 |
Total cash and cash equivalents(b) |  |  | $ | 20,844 |  |  | $ | 15,512 |
Marketable debt securities |  |  |  |  |
U.S. government and agencies | 2 |  | $ | 1,230 |  |  | $ | 3,310 |
Corporate debt | 2 |  | 3,478 |  |  | 3,665 |
Mortgage and asset-backed | 2 |  | 695 |  |  | 635 |
Sovereign debt | 2 |  | 563 |  |  | 703 |
Total available-for-sale debt securities – marketable securities |  |  | $ | 5,966 |  |  | $ | 8,313 |
Restricted cash |  |  |  |  |
Cash and cash equivalents |  |  | $ | 260 |  |  | $ | 219 |
Money market funds | 1 |  | 2,392 |  |  | 2,117 |
Total restricted cash |  |  | $ | 2,652 |  |  | $ | 2,336 |
Available-for-sale debt securities included above with contractual maturities(c) |  |  |  |  |  |  |
Due in one year or less |  |  | $ | 11,288 |  |  |
Due between one and five years |  |  | 4,406 |  |  |
Total available-for-sale debt securities with contractual maturities |  |  | $ | 15,694 |  |  |
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(a) | Includes $616 million that is designated exclusively to fund capital expenditures in GM Korea at December 31, 2018. Refer to Note 20 for additional information.
(b) | Includes $2.3 billion in GM Cruise at December 31, 2018. Refer to Note 20 for additional information.
(c) | Excludes mortgage and asset-backed securities.
Proceeds from the sale of investments classified as available-for-sale and sold prior to maturity were $4.3 billion, $5.6 billion and $8.5 billion in the years ended December 31, 2018, 2017 and 2016. Net unrealized gains and losses on available-for-sale debt securities were insignificant in the years ended December 31, 2018, 2017 and 2016. Cumulative unrealized gains and losses on available-for-sale debt securities were insignificant at December 31, 2018 and 2017. Investments in equity securities where market quotations are not available that are accounted for at fair value primarily use Level 3 inputs. We recorded an unrealized gain of $142 million in Interest income and other non-operating income, net in the year ended December 31, 2018 to adjust an investment in an equity security to a fair value of $884 million at December 31, 2018. The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the consolidated balance sheets that sum to the total of the same amounts shown in the consolidated statements of cash flows:
| December 31, 2018 |  | December 31, 2017
Cash and cash equivalents | $ | 20,844 |  |  | $ | 15,512 |
Restricted cash included in Other current assets | 2,083 |  |  | 1,745 |
Restricted cash included in Other assets | 569 |  |  | 591 |
Total | $ | 23,496 |  |  | $ | 17,848 |

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- Definition The entire disclosure of cash, cash equivalents, and debt and equity securities, including any unrealized or realized gain (loss). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 305 -URI http://asc.fasb.org/topic&trid=2122426 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 + Details
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