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Cover Page - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2022
Feb. 17, 2023
Jun. 30, 2022
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2022    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 1-35229    
Entity Registrant Name Xylem Inc.    
Entity Incorporation, State or Country Code IN    
Entity Tax Identification Number 45-2080495    
Entity Address, Address Line One 300 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    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 14.0
Entity Common Stock, Shares Outstanding   180,278,376  
Documents Incorporated by Reference Portions of the registrant’s definitive proxy statement for its 2023 Annual Meeting of Shareowners, to be held in May 2023, are incorporated by reference into Part II and Part III of this Report.    
Entity Central Index Key 0001524472    
Amendment Flag false    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY