Investments and Fair Value Measurement - Summary of Amortized Cost, Unrealized Gains and Losses of Financial Assets (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 10,314	$ 8,558
Unrealized Gains	12	8
Unrealized Losses	0	(4)
Fair Value	10,326	8,562
Realized gains or losses on debt securities	0	0	$ 0
U.S. government and agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	7,315	5,843
Unrealized Gains	8	7
Unrealized Losses	0	(2)
Fair Value	7,323	5,848
Commercial paper
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	715	702
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	715	702
Corporate bonds
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	2,190	1,975
Unrealized Gains	4	1
Unrealized Losses	0	(2)
Fair Value	2,194	1,974
Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	72	38
Unrealized Gains	0	0
Unrealized Losses	0	0
Fair Value	72	$ 38
Mortgage-backed and asset-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	22
Unrealized Gains	0
Unrealized Losses	0
Fair Value	$ 22

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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