Supplemental Financial Statement Information (Schedule of Other Income (Expense), Net) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Balance Sheet Components Disclosure [Abstract]
Interest income	$ 586	$ 522
Interest expense	(21)	(35)
Foreign currency exchange losses, net	(81)	74
Gain (loss) on debt securities, net	12	(2)
Gain (loss) on equity securities, net	(814)	1,083
Performance fees	6	(117)
Income (loss) and impairment from equity method investments, net	74	(40)
Other	18	53
Other income (expense), net	(220)	1,538
Interest costs capitalized	$ 52	$ 31