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Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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Amount of cash and cash equivalent, and cash and cash equivalent restricted to withdrawal or usage; attributable to continuing operation. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate.

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Basis of Presentation - Schedule of Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 3,435		$ 4,194
Restricted cash:
Prepaid expenses and other	318		319
Other assets	131		122
Assets held for sale:
Prepaid expenses and other	47		0
Cash, cash equivalents and restricted cash	3,931	$ 3,894	$ 4,635	$ 3,497
Increase / (Decrease) in cash, cash equivalents and restricted cash	(704)	$ 397
Cash and cash equivalents
Assets held for sale:
Increase / (Decrease) in cash, cash equivalents and restricted cash	(759)
Prepaid expenses and other
Assets held for sale:
Increase / (Decrease) in cash, cash equivalents and restricted cash	(1)
Increase / (Decrease) in assets held-for-sale	47
Other assets
Assets held for sale:
Increase / (Decrease) in cash, cash equivalents and restricted cash	$ 9