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Marketable Securities | 12 Months Ended
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Dec. 31, 2017
Marketable Securities |
Marketable Securities | NOTE 10. Marketable Securities The Company invests in asset-backed securities, certificates of deposit/time deposits, commercial paper, and other securities. The following is a summary of amounts recorded on the Consolidated Balance Sheet for marketable securities (current and non-current).
|  | December 31, |  | December 31, |
(Millions) |  | 2017 |  | 2016 |
Corporate debt securities |  | $ | 14 |  | $ | 10 |
Commercial paper |  |  | 899 |  |  | 14 |
Certificates of deposit/time deposits |  |  | 76 |  |  | 197 |
U.S. municipal securities |  |  | 3 |  |  | 3 |
Asset-backed securities: |  |  |  |  |  |  |
Automobile loan related |  |  | 16 |  |  | 31 |
Credit card related |  |  | 68 |  |  | 18 |
Other |  |  | — |  |  | 7 |
Asset-backed securities total |  |  | 84 |  |  | 56 |
Current marketable securities |  | $ | 1,076 |  | $ | 280 |
U.S. municipal securities |  | $ | 27 |  | $ | 17 |
Non-current marketable securities |  | $ | 27 |  | $ | 17 |
Total marketable securities |  | $ | 1,103 |  | $ | 297 |
At December 31, 2017 and 2016, gross unrealized, gross realized, and net realized gains and/or losses (pre-tax) were not material. The balance at December 31, 2017, 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) |  | December 31, 2017 |
Due in one year or less |  | $ | 1,071 |
Due after one year through five years |  |  | 18 |
Due after five years through ten years |  |  | 14 |
Total marketable securities |  | $ | 1,103 |
3M has a diversified marketable securities portfolio. Within this portfolio, asset-backed securities primarily include interests in automobile loans, credit cards and other asset-backed securities. 3M’s investment policy allows investments in asset-backed securities with minimum credit ratings of Aa3 by Moody’s Investors Service or AA- by Standard & Poor’s or Fitch Ratings or DBRS. Asset-backed securities must be rated by at least two of the aforementioned rating agencies, one of which must be Moody’s Investors Service or Standard & Poor’s. At December 31, 2017, all asset-backed security investments were in compliance with this policy. Approximately 90 percent of all asset-backed security investments were rated AAA or A-1+ by Standard & Poor’s and/or Aaa or P-1 by Moody’s Investors Service and/or AAA or F1+ by Fitch Ratings. Interest rate risk and credit risk related to the underlying collateral may impact the value of investments in asset-backed securities, while factors such as general conditions in the overall credit market and the nature of the underlying collateral may affect the liquidity of investments in asset-backed securities. 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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- Definition Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26626-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.4) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27161-111563 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.2,12) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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