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Marketable Securities (Tables) | 3 Months Ended
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Mar. 31, 2019
Marketable Securities. |
Schedule of marketable securities |
(Millions) |  | March 31, 2019 |  | December 31, 2018 |
Corporate debt securities |  | $ | 16 |  | $ | — |
Commercial paper |  |  | 510 |  |  | 366 |
Certificates of deposit/time deposits |  |  | 10 |  |  | 10 |
U.S. municipal securities |  |  | 3 |  |  | 3 |
Asset-backed securities |  |  | — |  |  | 1 |
Current marketable securities |  | $ | 539 |  | $ | 380 |
U.S. municipal securities |  | $ | 46 |  | $ | 37 |
Non-current marketable securities |  | $ | 46 |  | $ | 37 |
Total marketable securities |  | $ | 585 |  | $ | 417 |
Marketable securities by contractual maturity |
(Millions) |  | March 31, 2019 |
Due in one year or less |  | $ | 539 |
Due after one year through five years |  |  | 13 |
Due after five years through ten years |  |  | 24 |
Due after ten years |  |  | 9 |
Total marketable securities |  | $ | 585 |

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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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