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Reportable Business Segments (Capital Expenditures by Segment) (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |
Total capital expenditures | $ 98,300,000 | $ 84,300,000 | $ 69,900,000
New capital leases | 0 | 0 | 0
Residential Heating and Cooling [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total capital expenditures | 38,900,000 | 36,700,000 | 28,100,000
Commercial Heating and Cooling [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total capital expenditures | 18,500,000 | 11,500,000 | 8,600,000
Refrigeration [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total capital expenditures | 8,000,000 | 12,100,000 | 11,400,000
Corporate and Other [Member] |  |  |
Segment Reporting Information [Line Items] |  |  |
Total capital expenditures | $ 32,900,000 | $ 24,000,000 | $ 21,800,000

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- Definition Amount equal to the present value (the principal) at the beginning of the lease term of minimum lease payments during the lease term (excluding that portion of the payments representing executory costs such as insurance, maintenance, and taxes to be paid by the lessor, together with any profit thereon) net of payments or other amounts applied to the principal through the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84164817&loc=d3e45280-112737 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition 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. + References No definition available. + Details
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