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Marketable Securities | 3 Months Ended
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Mar. 31, 2018
Marketable Securities. |
Marketable Securities | NOTE 9. Marketable Securities The following is a summary of amounts recorded on the Consolidated Balance Sheet for marketable securities (current and non-current).
(Millions) |  | March 31, 2018 |  | December 31, 2017 |
Corporate debt securities |  | $ | 20 |  | $ | 14 |
Commercial paper |  |  | 495 |  |  | 899 |
Certificates of deposit/time deposits |  |  | 59 |  |  | 76 |
U.S. municipal securities |  |  | 3 |  |  | 3 |
Asset-backed securities: |  |  |  |  |  |  |
Automobile loan related |  |  | 8 |  |  | 16 |
Credit card related |  |  | 19 |  |  | 68 |
Asset-backed securities total |  |  | 27 |  |  | 84 |
Current marketable securities |  | $ | 604 |  | $ | 1,076 |
U.S. municipal securities |  | $ | 27 |  | $ | 27 |
Non-current marketable securities |  | $ | 27 |  | $ | 27 |
Total marketable securities |  | $ | 631 |  | $ | 1,103 |
At March 31, 2018 and December 31, 2017, gross unrealized, gross realized, and net realized gains and/or losses (pre-tax) were not material. The balances at March 31, 2018 for marketable securities by contractual maturity are shown below. Actual maturities may differ from contractual maturities because the issuers of the securities may have the right to prepay obligations without prepayment penalties.
(Millions) |  | March 31, 2018 |
Due in one year or less |  | $ | 604 |
Due after one year through five years |  |  | 13 |
Due after five years through ten years |  |  | 14 |
Total marketable securities |  | $ | 631 |
3M does not currently expect risk related to its holding in asset-backed securities to materially impact its financial condition or liquidity.

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