| Cover | Aug. 09, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Aug. 9, 2021 |
| Entity Registrant Name | SYNCHRONOSS TECHNOLOGIES INC |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 000-52049 |
| Entity Tax Identification Number | 06-1594540 |
| Entity Address, Address Line One | 200 Crossing Boulevard |
| Entity Address, Address Line Two | 8th Floor |
| Entity Address, City or Town | Bridgewater |
| Entity Address, State or Province | NJ |
| Entity Address, Postal Zip Code | 08807 |
| City Area Code | 866 |
| Local Phone Number | 620-3940 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001131554 |
| Amendment Flag | false |
| Common Stock, par value $.0001 par value | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $.0001 par value |
| Trading Symbol | SNCR |
| Security Exchange Name | NASDAQ |
| 8.375% $25.00 par value Senior Notes due 2026 | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 8.375% $25.00 par value Senior Notes due 2026 |
| Trading Symbol | SNCRL |
| Security Exchange Name | NASDAQ |
