| Cover | Feb. 16, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 16, 2021 |
| Entity File Number | 001-37429 |
| Entity Registrant Name | EXPEDIA GROUP, INC. |
| Entity Central Index Key | 0001324424 |
| Entity Tax Identification Number | 20-2705720 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 1111 Expedia Group Way W. |
| Entity Address, City or Town | Seattle |
| Entity Address, State or Province | WA |
| Entity Address, Postal Zip Code | 98119 |
| City Area Code | 206 |
| Local Phone Number | 481-7200 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Common Stock [Member] | NASDAQ/NGS (GLOBAL SELECT MARKET) [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $0.0001 per share |
| Trading Symbol | EXPE |
| Security Exchange Name | NASDAQ |
| Senior Notes 2. 500 Percent Due 2022 [Member] | NEW YORK STOCK EXCHANGE, INC. [Member] | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Expedia Group, Inc. 2.500% Senior Notes due 2022 |
| Trading Symbol | EXPE22 |
| Security Exchange Name | NYSE |
