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Marketable Securities | 3 Months Ended
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Mar. 31, 2022
Debt Securities, Available-for-sale [Abstract] |
Marketable Securities | 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).
(Millions) |  | March 31, 2022 |  | December 31, 2021
Commercial paper |  | $ | 35 |  |  | $ | 109 |
Certificates of deposit/time deposits |  | 24 |  |  | 14 |
U.S. treasury securities |  | 50 |  |  | 75 |
U.S. municipal securities |  | 3 |  |  | 3 |
Current marketable securities |  | 112 |  |  | 201 |
U.S. municipal securities |  | 27 |  |  | 27 |
Non-current marketable securities |  | 27 |  |  | 27 |
Total marketable securities |  | $ | 139 |  |  | $ | 228 |
At March 31, 2022 and December 31, 2021, gross unrealized, gross realized, and net realized gains and/or losses (pre-tax) were not material. The balances at March 31, 2022 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, 2022
Due in one year or less |  | $ | 112 |
Due after one year through five years |  | 15 |
Due after five years through ten years |  | 12 |
Total marketable securities |  | $ | 139 |

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- Definition The entire disclosure for investments in certain debt and equity securities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2209399 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2324412 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -URI http://asc.fasb.org/topic&trid=2196928 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 940 -SubTopic 320 -URI http://asc.fasb.org/subtopic&trid=2176304 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-K (SK) -Number 229 -Section 1403 -Paragraph (b) + Details
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