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## 11. Investments in debt and equity securities 

We have investments in certain debt and equity securities, primarily at Insurance Services, which we record at fair value and primarily include in Other assets in Statement 3. 

We classify debt securities as available-for-sale, and we include the unrealized gains and losses arising from the revaluation of these debt securities, net of applicable deferred income taxes, in equity (Accumulated other comprehensive income (loss) in Statement 3). We include the unrealized gains and losses arising from the revaluation of the equity securities in Other income (expense) in Statement 1. We generally determine realized gains and losses on sales of investments using the specific identification method for debt and equity securities and include them in Other income (expense) in Statement 1. 

The cost basis and fair value of debt securities with unrealized gains and losses included in equity (Accumulated other comprehensive income (loss) in Statement 3) were as follows: 

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As of December 31, 2020, there was no available-for-sale investments with net losses in accumulated other comprehensive income. As of December 31, 2019, the total unrealized loss for available-for-sale investments in an unrealized loss position that were not other-than temporarily impaired was $1 million. 

The cost basis and fair value of the available-for-sale debt securities at December 31, 2020, by contractual maturity, are shown below. Expected maturities will differ from contractual maturities because borrowers may have the right to prepay and creditors may have the right to call obligations. 

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