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Debt - Credit Facility Additional Information (Details) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 25, 2025
Sep. 30, 2025
Dec. 31, 2024
Jun. 14, 2024
Oct. 18, 2019
2025 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, face amount $ 750,000        
Line of credit facility, maximum borrowing capacity $ 750,000        
2018 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, face amount         $ 1,200,000
Line of credit facility, maximum borrowing capacity         500,000
Minimum [Member] | 2018 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate   0.00%      
Maximum [Member] | 2018 Credit Facility          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity       $ 500,000  
Credit Facility [Member]          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity   $ 750,000 $ 500,000    
Letters of credit outstanding, amount   $ 45,055 46,013    
Fed Funds Effective Rate Overnight Index Swap Rate [Member] | 2025 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate 0.50%        
Fed Funds Effective Rate Overnight Index Swap Rate [Member] | 2018 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate   0.50%      
Alternate base rate (3) [Member] | 2025 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate 1.00%        
Debt instrument, description of variable rate basis SOFR        
Alternate base rate (3) [Member] | 2018 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, basis spread on variable rate   1.00%      
Debt instrument, description of variable rate basis   one-month LIBOR      
London Interbank Offered Rate | 2025 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, description of variable rate basis the Term Secured Overnight Financing Rate        
London Interbank Offered Rate | 2018 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, description of variable rate basis   the LIBOR rate      
EURIBOR [Member] | 2018 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, description of variable rate basis   EURIBOR rate      
Alternate base rate [Member] | 2025 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, description of variable rate basis Alternate Base Rate        
Alternate base rate [Member] | 2018 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, description of variable rate basis   Alternate Base Rate      
Alternate base rate (1) [Member] | 2025 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, description of variable rate basis the prime rate        
Alternate base rate (1) [Member] | 2018 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, description of variable rate basis   the prime rate      
Alternate base rate (2) [Member] | 2025 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, description of variable rate basis the Federal Reserve effective rate        
Alternate base rate (2) [Member] | 2018 Credit Facility          
Debt Instrument [Line Items]          
Debt instrument, description of variable rate basis   the Federal Reserve effective rate      
USD Denominated Term Loan [Member]          
Debt Instrument [Line Items]          
Debt instrument, face amount         650,000
Standby Letters of Credit [Member]          
Debt Instrument [Line Items]          
Letters of credit outstanding, amount   $ 45,100      
Standby Letters of Credit [Member] | 2018 Credit Facility          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity         300,000
Standby Letters of Credit [Member] | Credit Facility [Member]          
Debt Instrument [Line Items]          
Line of credit facility, remaining borrowing capacity   254,900      
Standby Letters of Credit [Member] | Credit Facility [Member] | 2025 Credit Facility          
Debt Instrument [Line Items]          
Line of credit facility, remaining borrowing capacity $ 300,000        
Swingline sub-facility [Member] | 2025 Credit Facility          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity $ 50,000        
Swingline sub-facility [Member] | 2018 Credit Facility          
Debt Instrument [Line Items]          
Line of credit facility, maximum borrowing capacity         $ 50,000
Line of Credit [Member]          
Debt Instrument [Line Items]          
Multicurrency revolving line of credit   0 0    
Line of credit facility, remaining borrowing capacity   $ 704,945 $ 453,987    
Secured Debt [Member]          
Debt Instrument [Line Items]          
Debt instrument, collateral   All obligations under the 2018 credit facility were guaranteed by Itron, Inc. and material U.S. domestic subsidiaries and were secured by a pledge of substantially all of the assets of Itron, Inc. and material U.S. domestic subsidiaries. This includes a pledge of 100% of the capital stock of material U.S. domestic subsidiaries and up to 66% of the voting stock (100% of the non-voting stock) of first-tier foreign subsidiaries. In addition, the obligations of any foreign subsidiary who was a foreign borrower, as defined by the 2018 credit facility, were guaranteed by the foreign subsidiary and by its direct and indirect foreign parents.