Summary of Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation These accompanying financial statements present our results of operations, financial position and cash flows on a consolidated basis. The unaudited consolidated financial statements include Expedia Group, Inc., our wholly-owned subsidiaries, and entities we control, or in which we have a variable interest and are the primary beneficiary of expected cash profits or losses. We record our investments in entities that we do not control, but over which we have the ability to exercise significant influence, using the equity method or at fair value. We have eliminated significant intercompany transactions and accounts. We have prepared the accompanying unaudited consolidated financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial reporting. We have included all adjustments necessary for a fair presentation of the results of the interim period. These adjustments consist of normal recurring items. Our interim unaudited consolidated financial statements are not necessarily indicative of results that may be expected for any other interim period or for the full year. These interim unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2021, previously filed with the Securities and Exchange Commission (“SEC”). trivago is a separately listed company on the Nasdaq Global Select Market and, therefore is subject to its own reporting and filing requirements, which could result in possible differences that are not expected to be material to Expedia Group.
Accounting Estimates	Accounting Estimates We use estimates and assumptions in the preparation of our interim unaudited consolidated financial statements in accordance with GAAP. Our estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of our interim unaudited consolidated financial statements. These estimates and assumptions also affect the reported amount of net income or loss during any period. Our actual financial results could differ significantly from these estimates. The significant estimates underlying our interim unaudited consolidated financial statements include revenue recognition; recoverability of current and long-lived assets, intangible assets and goodwill; income and transactional taxes, such as potential settlements related to occupancy and excise taxes; loss contingencies; deferred loyalty rewards; stock-based compensation; accounting for derivative instruments and provisions for credit losses, customer refunds and chargebacks. The COVID-19 pandemic has created and may continue to create significant uncertainty in macroeconomic conditions, which may cause further business disruptions and adversely impact our results of operations. As a result, many of our estimates and assumptions required increased judgment and carry a higher degree of variability and volatility. As events continue to evolve and additional information becomes available, our estimates may change materially in future periods.
Reclassifications	ReclassificationsWe have reclassified prior period financial statements to conform to the current period presentation.
Seasonality	Seasonality We generally experience seasonal fluctuations in the demand for our travel services. For example, traditional leisure travel bookings are generally the highest in the first three quarters as travelers plan and book their spring, summer and winter holiday travel. The number of bookings typically decreases in the fourth quarter. Since revenue for most of our travel services, including merchant and agency hotel, is recognized as the travel takes place rather than when it is booked, revenue typically lags bookings by several weeks for our hotel business and can be several months or more for our alternative accommodations business. Historically, Vrbo has seen seasonally stronger bookings in the first quarter of the year, with the relevant stays occurring during the peak summer travel months. The seasonal revenue impact is exacerbated with respect to income by the nature of our variable cost of revenue and direct sales and marketing costs, which we typically realize in closer alignment to booking volumes, and the more stable nature of our fixed costs. Furthermore, operating profits for our primary advertising business, trivago, have typically been experienced in the second half of the year, particularly the fourth quarter, as selling and marketing costs offset revenue in the first half of the year as we typically increase marketing during the busy booking period for spring, summer and winter holiday travel. As a result on a consolidated basis, revenue and income are typically the lowest in the first quarter and highest in the third quarter. The growth of our international operations, advertising business or a change in our product mix, including the growth of Vrbo, may influence the typical trend of seasonality in the future.
Recent Adopted Accounting Policies And Recent Accounting Policies Not Yet Adopted	Recent Adopted Accounting Policies In June 2022, the Financial Accounting Standards Board (“FASB”) issued new guidance related to fair value measurement of equity securities, which clarifies the fair value measurement of an equity security that is subject to a contractual sale restriction and requires specific disclosures related to such an equity security. The new guidance is effective for fiscal years beginning after December 15, 2023, with early adoption permitted. We elected to early adopt the new guidance in the second quarter of 2022 on a prospective basis. One of our minority equity investments is accounted for in accordance with this new guidance. See Note 3 – Fair Value Measurements for additional information. Recent Accounting Policies Not Yet Adopted In October 2021, the FASB issued new guidance relate to recognizing and measuring contract assets and contract liabilities from contracts with customers acquired in a business combination. The new guidance will require acquiring entities to apply Topic 606 to recognize and measure contract assets and contract liabilities in a business combination as compared to current GAAP where an acquirer generally recognizes such items at fair value on the acquisition date. The new guidance is effective on a prospective basis for fiscal years beginning after December 15, 2022, with early adoption permitted. We do not expect it will have a material impact, if any, on our consolidated financial statements.
Revenue	RevenuePrepaid Merchant Bookings. We classify payments made to suppliers in advance of Vrbo performance obligations as prepaid merchant bookings included within prepaid and other current assets.Deferred Merchant Bookings. We classify cash payments received in advance of our performance obligations as deferred merchant bookings. Practical Expedients and Exemptions. We have used the portfolio approach to account for our loyalty points as the rewards programs share similar characteristics within each program in relation to the value provided to the traveler and their breakage patterns. Using this portfolio approach is not expected to differ materially from applying the guidance to individual contracts. However, we will continue to assess and refine, if necessary, how a portfolio within each rewards program is defined. We do not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.
Cash, Restricted Cash and Cash Equivalents	Cash, Restricted Cash, and Cash EquivalentsOur cash and cash equivalents include cash and liquid financial instruments, including U.S. treasury securities, money market funds and term deposit investments, with maturities of three months or less when purchased. Restricted cash includes cash and cash equivalents that is restricted through legal contracts, regulations or our intention to use the cash for a specific purpose. Our restricted cash relates to certain traveler deposits, primarily for Vrbo, and to a lesser extent collateral for office leases.
Accounts Receivable and Allowances	Accounts Receivable and AllowancesAccounts receivable are generally due within thirty days and are recorded net of an allowance for expected uncollectible amounts. We consider accounts outstanding longer than the contractual payment terms as past due. The risk characteristics we generally review when analyzing our accounts receivable pools primarily include the type of receivable (for example, credit card vs hotel collect), collection terms and historical or expected credit loss patterns. For each pool, we make estimates of expected credit losses for our allowance by considering a number of factors, including the length of time trade accounts receivable are past due, previous loss history continually updated for new collections data, the credit quality of our customers, current economic conditions, reasonable and supportable forecasts of future economic conditions and other factors that may affect our ability to collect from customers. The provision for estimated credit losses is recorded as cost of revenue in our consolidated statements of operations.
Fair Value Measurements	We classify our cash equivalents and investments within Level 1 and Level 2 as we value our cash equivalents and investments using quoted market prices or alternative pricing sources and models utilizing market observable inputs. Valuation of the foreign currency forward contracts is based on foreign currency exchange rates in active markets, a Level 2 input. Valuation of the cross-currency interest rate swaps is based on foreign currency exchange rates and the current interest rate curve, Level 2 inputs. We use foreign currency forward contracts to economically hedge certain merchant revenue exposures, foreign denominated liabilities related to certain of our loyalty programs and our other foreign currency-denominated operating liabilities. Our goal in managing our foreign exchange risk is to reduce, to the extent practicable, our potential exposure to the changes that exchange rates might have on our earnings, cash flows and financial position. Our foreign currency forward contracts are typically short-term and, as they do not qualify for hedge accounting treatment, we classify the changes in their fair value in other, net.

Summary of Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2022

These accompanying financial statements present our results of operations, financial position and cash flows on a consolidated basis. The unaudited consolidated financial statements include Expedia Group, Inc., our wholly-owned subsidiaries, and entities we control, or in which we have a variable interest and are the primary beneficiary of expected cash profits or losses. We record our investments in entities that we do not control, but over which we have the ability to exercise significant influence, using the equity method or at fair value. We have eliminated significant intercompany transactions and accounts.

We have prepared the accompanying unaudited consolidated financial statements in accordance with accounting principles generally accepted in the United States (“GAAP”) for interim financial reporting. We have included all adjustments necessary for a fair presentation of the results of the interim period. These adjustments consist of normal recurring items. Our interim unaudited consolidated financial statements are not necessarily indicative of results that may be expected for any other interim period or for the full year. These interim unaudited consolidated financial statements should be read in conjunction with the audited consolidated financial statements and related notes included in our Annual Report on Form 10-K for the year ended December 31, 2021, previously filed with the Securities and Exchange Commission (“SEC”). trivago is a separately listed company on the Nasdaq Global Select Market and, therefore is subject to its own reporting and filing requirements, which could result in possible differences that are not expected to be material to Expedia Group.

Accounting Estimates

We use estimates and assumptions in the preparation of our interim unaudited consolidated financial statements in accordance with GAAP. Our estimates and assumptions affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities as of the date of our interim unaudited consolidated financial statements. These estimates and assumptions also affect the reported amount of net income or loss during any period. Our actual financial results could differ significantly from these estimates. The significant estimates underlying our interim unaudited consolidated financial statements include revenue recognition; recoverability of current and long-lived assets, intangible assets and goodwill; income and transactional taxes, such as potential settlements related to occupancy and excise taxes; loss contingencies; deferred loyalty rewards; stock-based compensation; accounting for derivative instruments and provisions for credit losses, customer refunds and chargebacks.

The COVID-19 pandemic has created and may continue to create significant uncertainty in macroeconomic conditions, which may cause further business disruptions and adversely impact our results of operations. As a result, many of our estimates and assumptions required increased judgment and carry a higher degree of variability and volatility. As events continue to evolve and additional information becomes available, our estimates may change materially in future periods.

Reclassifications

ReclassificationsWe have reclassified prior period financial statements to conform to the current period presentation.

Seasonality

We generally experience seasonal fluctuations in the demand for our travel services. For example, traditional leisure travel bookings are generally the highest in the first three quarters as travelers plan and book their spring, summer and winter holiday travel. The number of bookings typically decreases in the fourth quarter. Since revenue for most of our travel services, including merchant and agency hotel, is recognized as the travel takes place rather than when it is booked, revenue typically lags bookings by several weeks for our hotel business and can be several months or more for our alternative accommodations business. Historically, Vrbo has seen seasonally stronger bookings in the first quarter of the year, with the relevant stays occurring during the peak summer travel months. The seasonal revenue impact is exacerbated with respect to income by the nature of our variable cost of revenue and direct sales and marketing costs, which we typically realize in closer alignment to booking volumes, and the more stable nature of our fixed costs. Furthermore, operating profits for our primary advertising business, trivago, have typically been experienced in the second half of the year, particularly the fourth quarter, as selling and marketing costs offset revenue in the first half of the year as we typically increase marketing during the busy booking period for spring, summer and winter holiday travel. As a result on a consolidated basis, revenue and income are typically the lowest in the first quarter and highest in the third quarter. The growth of our international operations, advertising business or a change in our product mix, including the growth of Vrbo, may influence the typical trend of seasonality in the future.

Recent Adopted Accounting Policies And Recent Accounting Policies Not Yet Adopted

Recent Adopted Accounting Policies

In June 2022, the Financial Accounting Standards Board (“FASB”) issued new guidance related to fair value measurement of equity securities, which clarifies the fair value measurement of an equity security that is subject to a contractual sale restriction and requires specific disclosures related to such an equity security. The new guidance is effective for fiscal years beginning after December 15, 2023, with early adoption permitted. We elected to early adopt the new guidance in the second quarter of 2022 on a prospective basis. One of our minority equity investments is accounted for in accordance with this new guidance. See Note 3 – Fair Value Measurements for additional information.

Recent Accounting Policies Not Yet Adopted

In October 2021, the FASB issued new guidance relate to recognizing and measuring contract assets and contract liabilities from contracts with customers acquired in a business combination. The new guidance will require acquiring entities to apply Topic 606 to recognize and measure contract assets and contract liabilities in a business combination as compared to current GAAP where an acquirer generally recognizes such items at fair value on the acquisition date. The new guidance is effective on a prospective basis for fiscal years beginning after December 15, 2022, with early adoption permitted. We do not expect it will have a material impact, if any, on our consolidated financial statements.

Revenue

RevenuePrepaid Merchant Bookings. We classify payments made to suppliers in advance of Vrbo performance obligations as prepaid merchant bookings included within prepaid and other current assets.Deferred Merchant Bookings. We classify cash payments received in advance of our performance obligations as deferred merchant bookings.

Practical Expedients and Exemptions. We have used the portfolio approach to account for our loyalty points as the rewards programs share similar characteristics within each program in relation to the value provided to the traveler and their breakage patterns. Using this portfolio approach is not expected to differ materially from applying the guidance to individual contracts. However, we will continue to assess and refine, if necessary, how a portfolio within each rewards program is defined.

We do not disclose the value of unsatisfied performance obligations for (i) contracts with an original expected length of one year or less and (ii) contracts for which we recognize revenue at the amount to which we have the right to invoice for services performed.

Cash, Restricted Cash and Cash Equivalents

Cash, Restricted Cash, and Cash EquivalentsOur cash and cash equivalents include cash and liquid financial instruments, including U.S. treasury securities, money market funds and term deposit investments, with maturities of three months or less when purchased. Restricted cash includes cash and cash equivalents that is restricted through legal contracts, regulations or our intention to use the cash for a specific purpose. Our restricted cash relates to certain traveler deposits, primarily for Vrbo, and to a lesser extent collateral for office leases.

Accounts Receivable and Allowances

Accounts Receivable and AllowancesAccounts receivable are generally due within thirty days and are recorded net of an allowance for expected uncollectible amounts. We consider accounts outstanding longer than the contractual payment terms as past due. The risk characteristics we generally review when analyzing our accounts receivable pools primarily include the type of receivable (for example, credit card vs hotel collect), collection terms and historical or expected credit loss patterns. For each pool, we make estimates of expected credit losses for our allowance by considering a number of factors, including the length of time trade accounts receivable are past due, previous loss history continually updated for new collections data, the credit quality of our customers, current economic conditions, reasonable and supportable forecasts of future economic conditions and other factors that may affect our ability to collect from customers. The provision for estimated credit losses is recorded as cost of revenue in our consolidated statements of operations.

Fair Value Measurements

We classify our cash equivalents and investments within Level 1 and Level 2 as we value our cash equivalents and investments using quoted market prices or alternative pricing sources and models utilizing market observable inputs. Valuation of the foreign currency forward contracts is based on foreign currency exchange rates in active markets, a Level 2 input. Valuation of the cross-currency interest rate swaps is based on foreign currency exchange rates and the current interest rate curve, Level 2 inputs. We use foreign currency forward contracts to economically hedge certain merchant revenue exposures, foreign denominated liabilities related to certain of our loyalty programs and our other foreign currency-denominated operating liabilities. Our goal in managing our foreign exchange risk is to reduce, to the extent practicable, our potential exposure to the changes that exchange rates might have on our earnings, cash flows and financial position. Our foreign currency forward contracts are typically short-term and, as they do not qualify for hedge accounting treatment, we classify the changes in their fair value in other, net.