Revenue Recognition (Narrative) (Details) - USD ($)	3 Months Ended
Revenue Recognition (Narrative) (Details) - USD ($)	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Contract with Customer, Liability, Revenue Recognized	$ 2,300,000	$ 5,700,000
Home Comfort Solutions \| Sales Channel, Directly to Consumer
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	0.73	0.74
Commercial Heating and Cooling \| Equipment Sales
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Excluding Assessed Tax	$ 0.79	$ 0.83

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details

LENNOX INTERNATIONAL INC 10-Q