| Document and Entity Information | Apr. 23, 2020 |
| Document And Entity Information [Line Items] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001324424 |
| Document Type | 8-K |
| Document Period End Date | Apr. 23, 2020 |
| Entity Registrant Name | EXPEDIA GROUP, INC. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-37429 |
| Entity Tax Identification Number | 20-2705720 |
| 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] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Common stock, $0.0001 par value |
| Trading Symbol | EXPE |
| Security Exchange Name | NASDAQ |
| Senior Notes [Member] | |
| Document And Entity Information [Line Items] | |
| Security 12b Title | Expedia Group, Inc. 2.500% Senior Notes due 2022 |
| Trading Symbol | EXPE22 |
| Security Exchange Name | NYSE |
