[Line Items] for Accounting Policies [Table]

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Government Grant And Other Assistance Benefit That Was Returned, Cash Paid

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Number of Investments Impaired

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Carrying value as of the balance sheet date of obligations incurred through that date and payable for advertising of the entity's goods and services. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Period between issuance and maturity of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Total of the carrying values as of the balance sheet date of obligations incurred through that date and payable for obligations related to services received from employees, such as accrued salaries and bonuses, payroll taxes and fringe benefits. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

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The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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The cash outflow from the repayment of a long-term debt instrument which can be exchanged for a specified amount of another security, typically the entity's common stock, at the option of the issuer or the holder.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - Narrative (Details) $ in Millions, € in Billions	1 Months Ended			12 Months Ended
	Sep. 30, 2021 USD ($)	Apr. 30, 2021 USD ($)	Mar. 31, 2021 EUR (€)	Dec. 31, 2021 USD ($) segment	Dec. 31, 2020 USD ($) segment	Dec. 31, 2019 USD ($) segment	Jan. 01, 2022 USD ($)	Mar. 31, 2020 investment	Dec. 31, 2018 USD ($)
Accounting Policies [Line Items]
Number of investments impaired \| investment								1
Proceeds from the issuance of long-term debt				$ 2,015	$ 4,108	$ 0
Accrued performance marketing liabilities				306	156
Accrued compensation liabilities				$ 421	$ 333
Number of operating segments \| segment				4	4	6
Number of reportable segments \| segment				1
Shareholders equity				$ 6,178	$ 4,893	$ 5,933			$ 8,785
Retained Earnings
Accounting Policies [Line Items]
Shareholders equity				24,453	$ 23,288	$ 23,232			$ 18,367
Accounting Standards Update 2020-06 \| Retained Earnings \| Subsequent Event
Accounting Policies [Line Items]
Shareholders equity							$ 30
COVID-19
Accounting Policies [Line Items]
Government grant and other assistance benefit that was returned, cash paid				$ 107
Senior Notes
Accounting Policies [Line Items]
Proceeds from the issuance of long-term debt \| €			€ 1.7
Payment to redeem debt		$ 2,000
Payment to satisfy the aggregate principal amount and the conversion premium in excess of the principal amount	$ 1,100
Maximum
Accounting Policies [Line Items]
Term of available-for-sale debt securities				5 years
Lease renewal terms				9 years