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Investments - Neumora Therapeutics, Inc. (Details) - USD ($) $ in Millions		12 Months Ended
	Sep. 30, 2021	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments		$ 157	$ 3,219	$ 24
Neumora Therapeutics, Inc.
Schedule of Equity Method Investments [Line Items]
Ownership percentage	25.90%	25.90%
Equity Method Investment, Aggregate Cost	$ 257
Payments to Acquire Equity Method Investments	100
Noncash or Part Noncash Acquisition, Investments Acquired	$ 157
Equity Method Investments, Fair Value Disclosure		$ 220

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