Credit Facility Additional Information (Details) - USD ($)	6 Months Ended
	Jun. 30, 2020	Mar. 25, 2020	Dec. 31, 2019	Oct. 18, 2019
Debt Instrument [Line Items]
Debt instrument, face amount				$ 1,200,000,000
Line of credit facility, maximum borrowing capacity				500,000,000
Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 500,000,000		$ 500,000,000
Line of credit facility, amount outstanding	400,000,000		0
Letters of credit outstanding, amount	45,458,000		41,072,000
Swingline sub-facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				50,000,000
Line of credit facility, amount outstanding	0
USD Denominated Term Loan [Member]
Debt Instrument [Line Items]
Debt instrument, face amount				650,000,000
Line of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, amount outstanding	400,000,000	$ 400,000,000	0
Line of credit facility, remaining borrowing capacity	54,542,000		$ 458,928,000
Standby Letters of Credit [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity				$ 300,000,000
Letters of credit outstanding, amount	$ 45,500,000
Secured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, collateral	All obligations under the 2018 credit facility are guaranteed by Itron, Inc. and material U.S. domestic subsidiaries and are 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 is a foreign borrower, as defined by the 2018 credit facility, are guaranteed by the foreign subsidiary and by its direct and indirect foreign parents.
Minimum [Member]
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.15%
Applicable interest rate	1.00%
Maximum [Member]
Debt Instrument [Line Items]
Line of credit facility, unused capacity, commitment fee percentage	0.25%
Applicable interest rate	1.75%
London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	the LIBOR rate
Debt instrument, basis spread on variable rate	1.50%
Applicable interest rate	1.68%
EURIBOR [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	EURIBOR rate
Alternate base rate (1) [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	the prime rate
Alternate base rate (2) [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	the Federal Reserve effective rate
Fed Funds Effective Rate Overnight Index Swap Rate [Member]
Debt Instrument [Line Items]
Debt instrument, basis spread on variable rate	0.50%
Alternate base rate (3) [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	one-month LIBOR
Debt instrument, basis spread on variable rate	1.00%
Alternate base rate [Member]
Debt Instrument [Line Items]
Debt instrument, description of variable rate basis	Alternate Base Rate