v3.19.3

Investments and Fair Value Measurement - Summary of Amortized Costs and Fair Value of Financial Assets (Details) - USD ($) $ in Millions	Sep. 30, 2019	Dec. 31, 2018
Amortized Cost
Amortized Cost, Within one year	$ 0	$ 0
Amortized Cost, One year through five years	2,279	2,275
Amortized Cost	2,279	2,275
Fair Value
Fair Value, Within one year	0	0
Fair Value, One year through five years	2,332	2,328
Fair Value	$ 2,332	$ 2,328

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date.

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