| Cover Page | Feb. 07, 2023 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Document Period End Date | Feb. 07, 2023 |
| Entity Registrant Name | XYLEM INC. |
| Entity Incorporation, State or Country Code | IN |
| Entity File Number | 001-35229 |
| Entity Tax Identification Number | 45-2080495 |
| Entity Address, Address Line One | 301 Water Street SE |
| Entity Address, City or Town | Washington |
| Entity Address, State or Province | DC |
| Entity Address, Postal Zip Code | 20003 |
| City Area Code | 202 |
| Local Phone Number | 869-9150 |
| Title of 12(b) Security | Common Stock, par value $0.01 per share |
| Trading Symbol | XYL |
| Security Exchange Name | NYSE |
| 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 | 0001524472 |
| Amendment Flag | false |
