Document and Entity Information
| Document and Entity Information Document | Dec. 11, 2019 |
| Document Information [Line Items] | |
| Title of 12(b) Security | Common Stock, par value $1 per share |
| Entity Incorporation, State or Country Code | IN |
| Amendment Flag | false |
| Document Period End Date | Dec. 11, 2019 |
| Entity Registrant Name | ITT INC. |
| Entity File Number | 001-05672 |
| Entity Tax Identification Number | 81-1197930 |
| Entity Address, Address Line One | 1133 Westchester Avenue |
| Entity Address, City or Town | White Plains |
| Entity Address, State or Province | NY |
| Entity Address, Postal Zip Code | 10604 |
| City Area Code | 914 |
| Local Phone Number | 641-2000 |
| Entity Information, Former Legal or Registered Name | Not Applicable |
| Written Communications | false |
| Soliciting Material | false |
| Trading Symbol | ITT |
| Security Exchange Name | NYSE |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
| Entity Central Index Key | 0000216228 |
| Document Type | 8-K |