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v3.22.1

Summary of Significant Accounting Policies - Short-Term and Long-Term Investment Securities (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2022 | Mar. 31, 2021 | Dec. 31, 2021
Accounting Policies [Abstract] |  |  |
Gains (losses) on securities | $ 0 | $ 0 |
Debt securities, held-to-maturity, sold, realized gain (loss) | 0 | 0 |
Unrealized loss on investments | 2,000,000 | $ 0 |
Available-for-sale investment securities |  |  |
Available-for-sale investment securities | 936,000,000 |  | $ 800,000,000
Held-to-maturity investment securities | 100,000,000 |  | 37,000,000
Total investment securities | 1,060,000,000 |  | 863,000,000
Time deposits |  |  |
Available-for-sale investment securities |  |  |
Available-for-sale investment securities | 865,000,000 |  | 790,000,000
Commercial paper |  |  |
Available-for-sale investment securities |  |  |
Available-for-sale investment securities | 61,000,000 |  | 2,000,000
Debt securities |  |  |
Available-for-sale investment securities |  |  |
Available-for-sale investment securities | 10,000,000 |  | 8,000,000
Corporate bonds |  |  |
Available-for-sale investment securities |  |  |
Held-to-maturity investment securities | 100,000,000 |  | 37,000,000
Equity investment securities |  |  |
Available-for-sale investment securities |  |  |
Equity investment securities | $ 24,000,000 |  | $ 26,000,000

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