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v3.20.2

Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions | Sep. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Available-for-sale securities |  |
Debt Securities, Available-for-sale | $ 8 | $ 6
Available-for-sale investment securities | 569 | 351
Debt Securities, Held-to-maturity | 0 | 21
Marketable securities | 569 | 372
Bank Time Deposits [Member] |  |
Available-for-sale securities |  |
Available-for-sale investment securities | 561 | 325
Corporate Bond Securities [Member] |  |
Available-for-sale securities |  |
Debt Securities, Held-to-maturity | 0 | 21
Commercial Paper [Member] |  |
Available-for-sale securities |  |
Available-for-sale investment securities | $ 0 | $ 20

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- Definition Amount 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/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(6)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121558606&loc=SL82898722-210454 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121553693&loc=d3e26610-111562 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (aa) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27161-111563 + Details
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