Accounting Policies and Supplemental Disclosures - Other Income (Expense), Net (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Jun. 30, 2022	Jun. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Accounting Policies [Abstract]
Marketable equity securities valuation gains (losses)	$ 1,039	$ (129)			$ (11,528)	$ (48)
Equity warrant valuation gains (losses)	(170)	(50)			(1,606)	1,194
Upward adjustments relating to equity investments in private companies	11	155			76	1,661
Foreign currency gains (losses)	(103)	(107)			(206)	(28)
Other, net	(18)	(32)			(92)	16
Total other income (expense), net	759	(163)			(13,356)	2,795
Schedule of Investments [Line Items]
Marketable equity securities valuation gains (losses)	1,039	(129)			(11,528)	(48)
Loss from operations	2,525	4,852			9,511	21,419
Net loss	2,872	$ 3,156			(3,000)	$ 19,041	$ 11,323	$ 26,263
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Accounting Policies [Abstract]
Marketable equity securities valuation gains (losses)	1,100				(10,400)
Schedule of Investments [Line Items]
Marketable equity securities valuation gains (losses)	$ 1,100				$ (10,400)
Equity investment, shares held (in shares)	158				158		158
Equity investment, ownership percentage	17.00%				17.00%		17.00%
Equity investment, voting interest	16.00%				16.00%		16.00%
Revenues			$ 459	$ 0
Gross profit			(1,206)	0
Loss from operations			(3,287)	(990)
Net loss			$ (3,305)	$ (994)