v3.19.3
Cover Page - shares
9 Months Ended
Sep. 30, 2019
Oct. 25, 2019
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2019  
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 1 International Drive  
Entity Address, City or Town Rye Brook  
Entity Address, State or Province NY  
Entity Address, Postal Zip Code 10573  
City Area Code 914  
Local Phone Number 323-5700  
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  
Entity Common Stock, Shares Outstanding   180,078,871
Entity Shell Company false  
Entity Central Index Key 0001524472  
Amendment Flag false  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --12-31  
Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol XYL  
Security Exchange Name NYSE  
Senior Notes Due 2023, 2.250%    
Document Information [Line Items]    
Title of 12(b) Security 2.250% Senior Notes due 2023  
Trading Symbol XYL23  
Security Exchange Name NYSE