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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities      
Net income (loss) including non-controlling interests $ 2,156 $ (9,138) $ (570)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:      
Depreciation and amortization 823 947 902
Bad debt expense 92 114 109
Stock-based compensation 1,935 1,793 1,168
Loss from sale of investments 74 0 (413)
Gain on business divestitures (204) (14) (1,684)
Deferred income taxes 26 (441) (692)
Impairments of goodwill, long-lived assets and other assets 86 28 116
Impairment of equity method investment 0 182 0
Loss (income) from equity method investments, net (48) (107) 37
Unrealized (gain) loss on debt and equity securities, net (1,610) 7,045 (1,142)
Revaluation of MLU B.V. call option 0 (191) 0
Unrealized foreign currency transactions 138 96 38
Other (48) (7) 4
Change in assets and liabilities, net of impact of business acquisitions and disposals:      
Accounts receivable (758) (542) (597)
Prepaid expenses and other assets (1,462) (196) (236)
Collateral held by insurer 0 0 860
Operating lease right-of-use assets 191 193 165
Accounts payable 64 (133) 90
Accrued insurance reserves 2,015 736 516
Accrued expenses and other liabilities 295 492 1,068
Operating lease liabilities (180) (215) (184)
Net cash provided by (used in) operating activities 3,585 642 (445)
Cash flows from investing activities      
Purchases of property and equipment (223) (252) (298)
Purchases of non-marketable equity securities (52) (14) (982)
Purchases of marketable securities (8,774) (1,708) (1,113)
Proceeds from sale of non-marketable equity securities 0 0 500
Proceeds from maturities and sales of marketable securities 5,069 376 2,291
Proceeds from sale of equity method investments 721 0 1,000
Proceeds from business divestiture 0 26 0
Acquisition of businesses, net of cash acquired 0 (59) (2,314)
Purchase of notes receivables 0 0 (297)
Other investing activities 33 (6) 12
Net cash used in investing activities (3,226) (1,637) (1,201)
Cash flows from financing activities      
Proceeds from issuance and sale of subsidiary stock units 0 255 675
Proceeds from the issuance of common stock under the Employee Stock Purchase Plan 130 92 107
Issuance of term loan and notes, net of issuance costs 2,824 0 1,766
Purchase of Capped Calls (141) 0 0
Principal repayment on term loan and notes (2,675) 0 (309)
Principal repayment on Careem Notes (25) (80) (307)
Principal payments on finance leases (171) (184) (226)
Other financing activities (37) (68) 74
Net cash provided by (used in) financing activities (95) 15 1,780
Effect of exchange rate changes on cash and cash equivalents, and restricted cash and cash equivalents 63 (148) (69)
Net increase (decrease) in cash and cash equivalents, and restricted cash and cash equivalents 327 (1,128) 65
Cash and cash equivalents, and restricted cash and cash equivalents      
Beginning of period   6,677 7,805
Reclassification from (to) assets held for sale during the period 0 0 349
End of period, excluding cash classified within assets held for sale 7,004 6,677 7,805
Cash paid for:      
Interest, net of amount capitalized 629 513 449
Income taxes, net of refunds 234 175 87
Non-cash investing and financing activities:      
Finance lease obligations 216 349 184
Right-of-use assets obtained in exchange for lease obligations 84 329 273
Common stock issued in connection with acquisitions 0 0 1,868
Ownership interest received in exchange for divestitures 300 0 1,018
Conversion of convertible notes to common stock related to Careem $ 0 $ 0 $ 232