Other Assets (BMC Holdco) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Schedule of Equity Method Investments [Line Items]
(Loss) gain on nonmarketable equity investments, net		$ (132)	$ 142	$ 99
Impairment charges		138	1
Carrying amount, equity investments without a readily determinable fair value		123	260
Upward adjustments		177	183
Downward adjustments (including impairment)		143	12
BMC Holdco
Schedule of Equity Method Investments [Line Items]
Pre-money equity valuation			6,900
BMC Holdco
Schedule of Equity Method Investments [Line Items]
(Loss) gain on nonmarketable equity investments, net			38
Proceeds from sale of equity securities without readily determinable fair value			$ 45
Impairment charges	$ 136
Carrying amount, equity investments without a readily determinable fair value		19
Upward adjustments		136
Downward adjustments (including impairment)		$ 136