Supplemental Financial Statement Information (Schedule of Other Income (Expense), Net) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Balance Sheet Components Disclosure [Abstract]
Interest income	$ 460	$ 631	$ 1,479	$ 1,806
Interest expense	(48)	(23)	(82)	(83)
Foreign currency exchange losses, net	(84)	41	(257)	63
Gain (loss) on debt securities, net	116	49	515	145
Gain (loss) on equity securities, net	1,899	(1,528)	2,540	2,254
Performance fees	(135)	227	(204)	(333)
Income (loss) and impairment from equity method investments, net	26	(14)	46	(70)
Other	(88)	68	(217)	174
Other income (expense), net	2,146	(549)	3,820	3,956
Interest costs capitalized	$ 53	$ 46	$ 162	$ 113