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foreign subsidiaries reclassified into net income Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), Divestiture, before Reclassification and Tax Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), Divestiture, before Reclassification and Tax Sell CAD Buy USD Sell CAD Buy USD [Member] Sell CAD Buy USD Share-Based Compensation Plans Share-Based Payment Arrangement [Text Block] 5.450% Senior Notes Due 2036 5.450% Senior Notes Due 2036 [Member] 5.450% Senior Notes Due 2036 Intangible Asset, Excluding Goodwill, Indefinite-Lived, Impairment Loss Intangible Asset, Excluding Goodwill, Indefinite-Lived, Impairment Loss PEO PEO [Member] 2028 Long-Term Debt, Maturity, Year Two Total Debt, Long-Term and Short-Term, Combined Amount Share-based payment arrangement, expense Share-Based Payment Arrangement, Expense Goodwill Adjustment Due To Segment Reallocation, Adjusted Balance Goodwill Adjustment Due To Segment 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Equity [Roll Forward] Award Timing Disclosures [Line Items] Foreign Currency Translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Foreign currency and other Restructuring Reserve, Translation and Other Adjustment Diluted (usd per share) Diluted earnings per share (usd per share) Earnings Per Share, Diluted Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Entity Current Reporting Status Entity Current Reporting Status Net Cash – Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Total Shareholder Return Amount Total Shareholder Return Amount Regional Selling Locations Regional Selling Locations [Member] Regional Selling Locations [Member] Cash Flow Hedges Cash Flow Hedging [Member] Amortization expense related to finite-lived intangible assets Intangible Asset, Finite-Lived, Amortization Expense Intangible Asset, Finite-Lived Intangible Asset, 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Common stock, shares issued (in shares) Common Stock, Shares, Issued Measure: Measure [Axis] Additions, net Contract With Customer, Liability, Additions Contract With Customer, Liability, Additions Treasury stock (in shares) Treasury Stock, Common, Shares Amount of gain recognized relating to divestiture of foreign subsidiaries reclassified into net income Other Comprehensive Income (Loss), Defined Benefit Plan, Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Foreign Currency Transaction and Translation Reclassification Adjustment from AOCI, Realized upon Sale or Liquidation, before Tax Accumulated Other Comprehensive Income (Loss) Comprehensive Income (Loss) Note [Text Block] Equity Components [Axis] Equity Components [Axis] Product and Service [Domain] Product and Service [Domain] Income taxes (net of refunds received) Income Tax Paid, after Refund Received Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Entity Interactive Data Current Entity Interactive Data Current Net loss attributable to non-controlling interests Net Income (Loss) Attributable to Noncontrolling Interest Costs Incurred In Q1 2026 Costs Incurred In Q1 2026 [Member] Costs Incurred In Q1 2026 Supplier Finance Program [Line Items] Supplier Finance Program [Line Items] Deferred income tax liabilities Deferred Income Tax Liabilities, Net Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Small Business Entity Small Business Comprehensive income attributable to Xylem Comprehensive Income (Loss), Net of Tax, Attributable to Parent Redeemable noncontrolling interest, fixed strike price Redeemable Noncontrolling Interest, Fixed Strike Price Redeemable Noncontrolling Interest, Fixed Strike Price Termination Date Trading Arrangement Termination Date Useful life (in years) Intangible Asset, Finite-Lived, Acquired, Weighted-Average Amortization Period Business combination, remaining consideration to be paid Business Combination, Remaining Consideration To Be Paid Business Combination, Remaining Consideration To Be Paid Consideration, note receivable Disposal Group, Including Discontinued Operation, Consideration, Note Receivable Disposal Group, Including Discontinued Operation, Consideration, Note Receivable Cumulative Translation adjustment Redeemable Noncontrolling Interest, Equity, Carrying Amount translation adjustment Redeemable Noncontrolling Interest, Equity, Carrying Amount translation adjustment Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Global Omnium Idrica S.L. Global Omnium Idrica S.L. [Member] Global Omnium Idrica S.L. Changes in long term receivables Increase (Decrease) In Long Term Receivables Increase (Decrease) In Long Term Receivables Other non-current assets Other Assets, Noncurrent Document Type Document Type Acquisitions of businesses, net of cash acquired Acquisition of business, net of cash acquired Payments to Acquire Businesses, Net of Cash Acquired Accrued and other current liabilities Total accrued and other current liabilities Accrued Liabilities, Current Components of net periodic benefit cost and other amounts recognized in other comprehensive income Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] Fair Value as of Grant Date Award Grant Date Fair Value Cash received from cross-currency swaps Proceeds from Derivative Instrument, Investing Activities Components of net periodic benefit cost and other amounts recognized in other comprehensive income : Defined Benefit Plan, Change in Benefit Obligation [Roll Forward] Debt instrument, redemption price, percentage Debt Instrument, Redemption Price, Percentage Recently Issued Accounting Pronouncements Significant Accounting Policies [Text Block] Aggregate intrinsic value, exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Remaining authorized amount of repurchase Share Repurchase Program, Remaining Authorized, Amount Impairment of intangible assets Intangible Asset, Excluding Goodwill, Impairment Loss Emerging Markets Emerging Markets [Member] Emerging Markets Royalty on revenue, period after acquisition Asset Acquisition, Royalty On Revenue, Period after Acquisition Asset Acquisition, Royalty On Revenue, Period after Acquisition Arrangement Duration Trading Arrangement Duration Other Intangible Assets Schedule Of Intangible Assets Excluding Goodwill [Table Text Block] Schedule of intangible assets excluding goodwill. 2.250% Senior Notes Due 2031 2.250% Senior Notes Due 2031 [Member] 2.250% Senior Notes Due 2031 Long-term debt issued, net Proceeds from Issuance of Long-Term Debt Local Phone Number Local Phone Number Treatment Treatment [Member] Treatment [Member] Consolidation Items [Axis] Consolidation Items [Axis] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Income before taxes Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Aggregate intrinsic value, vested and expected to vest Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Schedule of Earnings Per Share Basic and Diluted [Line Items] Schedule of Earnings Per Share Basic and Diluted [Line Items] Schedule of earnings per share basic and diluted. 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Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Shares repurchased (in shares) (less than) Treasury Stock, Shares, Acquired Indefinite-lived intangibles Unclassified Indefinite-Lived Intangible Assets [Member] Net change in derivative hedge agreements: Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification, before Tax [Abstract] PEO Name PEO Name Geographical [Axis] Geographical [Axis] Changes in accrued expenses Increase (Decrease) in Accrued Liabilities Beginning balance Ending balance Contract with Customer, Liability Derivative Instruments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Business combination, remaining consideration to be paid, period Business Combination, Remaining Consideration To Be Paid, Period Business Combination, Remaining Consideration To Be Paid, Period Other segment item Segment Reporting, Other Segment Item, Amount Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] 4.375% Senior Notes Due 2046 4.375% Senior Notes Due 2046 [Member] Senior Notes Due Two Thousand Forty Six [Member] Foreign currency translation adjustment Foreign currency translation adjustment Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss), before Reclassification and Tax Entity Tax Identification Number Entity Tax Identification Number Repurchase of common stock Shares repurchased Treasury Stock, Value, Acquired, Cost Method Payments for restructuring Cash payments Payments for Restructuring Exercised (in usd per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Cash and cash equivalents at beginning of year Cash and cash equivalents at end of period Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Schedule of Finite-Lived Intangible Assets [Table] Intangible Asset, Finite-Lived [Table] Other accrued liabilities Other Accrued Liabilities, Current Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Maximum leverage ratio, before acquisition Debt Instrument, Covenant, Maximum Leverage Ratio, Four Consecutive Quarters Before Additional Material Acquisition Debt Instrument, Covenant, Maximum Leverage Ratio, Four Consecutive Quarters Before Additional Material Acquisition Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Non-NEOs Non-NEOs [Member] Return on Invested Capital Performance-Based Shares Return on Invested Capital Performance-Based Shares [Member] Return on Invested Capital Performance-Based Shares [Member] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Comprehensive income Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Weighted-average fair value / share (in usd per share) Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Weighted Average Fair Value Share based compensation arrangement by share based payment award fair value assumptions weighted average fair value. Debt Instrument [Axis] Debt Instrument [Axis] Payments to acquire businesses, gross Payments to Acquire Businesses, Gross Share-based compensation Share-Based Payment Arrangement, Noncash Expense Components of restructuring and asset impairment charges Schedule of Components of Restructuring and Asset Impairment Charges [Table Text Block] Schedule of Components of Restructuring and Asset Impairment Charges [Table Text Block] Dividends declared Dividends, Cash Purchase price of common stock, percent Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent Disposal Group Name [Axis] Disposal Group Name [Axis] Employee Stock Employee Stock [Member] Other (in shares) Other (in shares) Share Based Compensation Arrangement By Share Based Payment Award, Other Changes In Stock Option Activity, Number Of Shares Share Based Compensation Arrangement By Share Based Payment Award, Other Changes In Stock Option Activity, Number Of Shares Investment, Name [Domain] Investment, Name [Domain] Inventories Schedule of Inventory, Current [Table Text Block] 2027 Long-Term Debt, Maturity, Year One Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Basic (usd per share) Basic earnings per share (usd per share) Earnings Per Share, Basic Equity, Class of Treasury Stock [Line Items] Equity, Class of Treasury Stock [Line Items] Repurchase of common stock Payments for repurchase of common stock Payments for Repurchase of Common Stock Total current assets Assets, Current Other Other Geographical Regions [Member] Other Geographical Regions [Member] Statistical Measurement [Axis] Statistical Measurement [Axis] Insider Trading Arrangements [Line Items] Supplier Finance Program [Table] Supplier Finance Program [Table] Long-term debt Long-Term Debt, Excluding Current Maturities Restructuring and asset impairment charges Restructuring and Asset Impairment Losses Restructuring and Asset Impairment Losses Thereafter Long-Term Debt, Maturity, After Year Four Long-Term Debt, Maturity, After Year Four Cost of revenue Cost of Revenue Unrealized loss on derivative hedge agreements Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax Award Type [Axis] Award Type [Axis] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Receivables, less allowances for discounts, returns and credit losses of $54 and $68 in 2026 and 2025, respectively Accounts Receivable, after Allowance for Credit Loss, Current Retained earnings Retained Earnings (Accumulated Deficit) Accrued restructuring liabilities Accrued Restructuring Liabilities, Current Accrued Restructuring Liabilities, Current Net change in post-retirement benefit plans: Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, before Tax [Abstract] Restructuring and Related Activities [Abstract] Restructuring and Related Activities [Abstract] Product and Service [Axis] Product and Service [Axis] Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Common Stock Common Stock [Member] Volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Services Services [Member] Services Other postretirement benefit expense Other Postretirement Benefits Cost (Reversal of Cost) Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cover page. Cover [Abstract] Performance-based shares valuation assumptions Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block] Schedule of Share-based Payment Award, Equity Instruments Other than Options, Valuation Assumptions [Table Text Block] Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Noncontrolling Interest [Abstract] Derivative Contract [Domain] Derivative Contract [Domain] Foreign currency and other Goodwill, Foreign Currency Translation, Gain (Loss) Equity Awards Adjustments Equity Awards Adjustments [Member] Hedging Relationship [Domain] Hedging Relationship [Domain] Total liabilities, redeemable non-controlling interest, and stockholders’ equity Liabilities and Equity Restructuring Charges Restructuring, Impairment, and Other Activities Disclosure [Text Block] Stock options Stock Options Share-Based Payment Arrangement, Option [Member] Short-term borrowings and current maturities of long-term debt Less: short-term borrowings and current maturities of long-term debt Debt, Current Non-controlling interests Equity, Attributable to Noncontrolling Interest Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Euro Commercial Paper Program Euro Commercial Paper Program [Member] Euro Commercial Paper Program [Member] Plan Name [Axis] Plan Name [Axis] Restructuring costs Total restructuring costs Restructuring Charges Maximum permitted increases in Credit Facility borrowing base Line of Credit Facility, Increases in Maximum Borrowing Capacity, Total Line of Credit Facility, Increases in Maximum Borrowing Capacity, Total Customer-related liabilities Customer Related Liabilities Current Customer related liabilities current. Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Tabular List, Table Tabular List [Table Text Block] Green Bond Green Bond [Member] Green Bond Other non-operating (expense)/income, net Other non-operating income, net Other Nonoperating Income (Expense) Accrued and Other Current Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Amortization of net actuarial gain into net income Other Comprehensive (Income) Loss, Defined Benefit Plan, Reclassification Adjustment from AOCI, before Tax Name Awards Close in Time to MNPI Disclosures, Individual Name Performance obligation, partially satisfied Contract With Customer, Performance Obligation, Partially Satisfied Contract With Customer, Performance Obligation, Partially Satisfied WaterFleet Intermediate Holdings, Inc. WaterFleet Intermediate Holdings, Inc. [Member] WaterFleet Intermediate Holdings, Inc. Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Aggregate intrinsic value, outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Estimated environmental matters Accrual for Environmental Loss Contingencies, Gross Forfeited (in shares) Forfeited Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Redeemable Noncontrolling Interest Redeemable Noncontrolling Interest [Table Text Block] Water Infrastructure Water Infrastructure Water Infrastructure Segment [Member] Water Infrastructure [Member] Increase in cash classified within assets held for sale Increase In Cash Classified Within Assets Held-for-Sale Increase In Cash Classified Within Assets Held-for-Sale Derivatives, Fair Value Derivatives, Fair Value 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[Abstract] Statement of Cash Flows [Abstract] Hedging Designation [Axis] Hedging Designation [Axis] Total Shareholder Return Performance-Based Shares Total Shareholder Return Performance-Based Shares [Member] Total Shareholder Return Performance-Based Shares [Member] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Vested and expected, end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Name Measure Name Income Taxes Income Tax Disclosure [Text Block] Reclassification of unrealized gain (loss) on foreign exchange agreements Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, before Tax Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Other, net Other Noncash Income (Expense) Debt Instrument Debt Instrument [Line Items] Share Repurchase Programs Share Repurchase Plans [Member] Share Repurchase Plans [Member] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Corporate and other Corporate Segment and Other Operating Segment [Member] Consideration transferred Business Combination, Consideration Transferred Capital in Excess of Par Value Additional Paid-in Capital [Member] Retirement Plan Type [Domain] Retirement Plan Type [Domain] Entity Filer Category Entity Filer Category Credit Facilities and Long-Term Debt : Long-Term Debt, by Current and Noncurrent [Abstract] Pac Machine Pac Machine [Member] Pac Machine Sell SEK Buy Euro Sell SEK Buy Euro [Member] Sell SEK Buy Euro Net charges for product warranties in the period Standard Product Warranty Accrual, Increase (Decrease) for Preexisting Warranties Name Trading Arrangement, Individual Name Cash and cash equivalents Cash and Cash Equivalent Summary of the changes in outstanding stock options Schedule of Stock Options Roll Forward [Table Text Block] Raw materials Inventory, Raw Materials, Net of Reserves Company Selected Measure Amount Company Selected Measure Amount Term of EPS performance target Share Based Compensation Arrangement By Share Based Payment Award, Revenue Performance Share Unit Grant, Term Of EPS Performance Target Share Based Compensation Arrangement By Share Based Payment Award, Revenue Performance Share Unit Grant, Term Of EPS Performance Target Depreciation and Amortization: Depreciation, Depletion and Amortization Vested and expected to vest, end of period Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Simply Clean Air and Water, Inc Simply Clean Air and Water, Inc [Member] Simply Clean Air and Water, Inc Net income Net income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Current assets: Assets, Current [Abstract] Term of Revenue performance target Share Based 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