Document And Entity Information - shares |
6 Months Ended | |
|---|---|---|
Jan. 31, 2016 |
Feb. 29, 2016 |
|
| Document And Entity Information [Abstract] | ||
| Entity Registrant Name | DONALDSON CO INC | |
| Entity Central Index Key | 0000029644 | |
| Current Fiscal Year End Date | --07-31 | |
| Entity Filer Category | Large Accelerated Filer | |
| Document Type | 10-Q | |
| Document Period End Date | Jan. 31, 2016 | |
| Document Fiscal Year Focus | 2016 | |
| Document Fiscal Period Focus | Q2 | |
| Amendment Flag | false | |
| Entity Common Stock, Shares Outstanding | 132,940,932 |