| Document And Entity Information - shares | 3 Months Ended | |
| Mar. 31, 2019 | Apr. 26, 2019 | |
| Document And Entity Information [Abstract] | ||
| Document Type | 10-Q/A | |
| Amendment Flag | true | |
| Amendment Description | This Amendment No. 1 on Form 10-Q/A (this “Form 10-Q/A”) amends our Quarterly Report for the period ended March 31, 2019 originally filed with the Securities and Exchange Commission (“SEC”) on April 29, 2019 (the “Form 10-Q”). When filed, Exhibit 32 to our Quarterly Report on Form 10-Q reflected a clerical error identifying an incorrect periodic report. We are filing this Form 10-Q/A to re-file Exhibit 32 to reference the proper periodic report. Exhibit 32, “Certification Pursuant to 18 U.S.C Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002," is being filed with this Amendment No.1. No other information contained in the original filing is amended by this Form 10-Q/A. | |
| Document Period End Date | Mar. 31, 2019 | |
| Document Fiscal Year Focus | 2019 | |
| Document Fiscal Period Focus | Q1 | |
| Entity Registrant Name | CROWN HOLDINGS INC | |
| Entity Central Index Key | 0001219601 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Filer Category | Large Accelerated Filer | |
| Entity Emerging Growth Company | false | |
| Entity Small Business | false | |
| Entity Common Stock, Shares Outstanding | 135,338,696 |
