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Basis of Presentation - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 4,987		$ 2,065
Restricted cash:
Prepaid expenses and other	273		1,244
Other assets	127		188
Cash, cash equivalents and restricted cash	5,387	$ 5,660	$ 3,497	$ 4,111
Increase / (Decrease) in cash, cash equivalents and restricted cash	1,890	$ 1,549
Cash and cash equivalents
Restricted cash:
Increase / (Decrease) in cash, cash equivalents and restricted cash	2,922
Prepaid expenses and other
Restricted cash:
Increase / (Decrease) in cash, cash equivalents and restricted cash	(971)
Other assets
Restricted cash:
Increase / (Decrease) in cash, cash equivalents and restricted cash	$ (61)