Investments and Fair Value Measurement - Unrealized Gain (Loss) on Non-Marketable Securities (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value Disclosures [Abstract]
Upward adjustments		$ 1,046	$ 71	$ 0
Downward adjustments (including impairment)	$ (1,700)	(641)	0	(1,690)
Total unrealized gain (loss) for non-marketable equity securities		$ 405	$ 71	$ (1,690)