| Cover Document | Sep. 28, 2021 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period Start Date | Sep. 28, 2021 |
| Entity Incorporation, State or Country Code | DE |
| Entity File Number | 1-12139 |
| Entity Tax Identification Number | 65-0654331 |
| Entity Address, Address Line One | 2415 Cascade Pointe Boulevard |
| Entity Address, City or Town | Charlotte |
| Entity Address, State or Province | NC |
| Entity Address, Postal Zip Code | 28208 |
| City Area Code | 980 |
| Local Phone Number | 221-3235 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, par value $0.10 per share |
| Trading Symbol | SEE |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0001012100 |
| Entity Registrant Name | SEALED AIR CORP/DE |
| Amendment Flag | false |
