| Cover | Feb. 09, 2021 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 9, 2021 |
| Entity Registrant Name | CROWN HOLDINGS, INC. |
| Entity Incorporation, State or Country Code | PA |
| Entity File Number | 000-50189 |
| Entity Tax Identification Number | 75-3099507 |
| Entity Address, Address Line One | 770 Township Line Road |
| Entity Address, City or Town | Yardley |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19067 |
| City Area Code | 215 |
| Local Phone Number | 698-5100 |
| 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 | 0001219601 |
| Amendment Flag | false |
| New York Stock Exchange | |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock $5.00 Par Value |
| Trading Symbol | CCK |
| Security Exchange Name | NYSE |
| 7 3/8% Debentures Due 2026 | New York Stock Exchange | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 7 3/8% Debentures Due 2026 |
| Trading Symbol | CCK26 |
| Security Exchange Name | NYSE |
| 7 1/2% Debentures Due 2096 | New York Stock Exchange | |
| Document Information [Line Items] | |
| Title of 12(b) Security | 7 1/2% Debentures Due 2096 |
| Trading Symbol | CCK96 |
| Security Exchange Name | NYSE |
