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Present and Prospective Accounting Pronouncements Effect of change related to ASU 2017-07 and other reclassifications (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cost of sales | $ 524.0 | $ 507.7 | $ 1,588.7 | $ 1,502.3
Depreciation and amortization | 30.7 | 31.1 | 91.8 | 91.3
Selling, general and administrative expense | 51.2 | 49.3 | 151.9 | 145.3
Income from operations | 167.6 | 161.5 | 509.8 | 373.0
Total non-operating income (expense) | $ (0.6) | (4.2) | $ (3.5) | (14.8)
Scenario, Previously Reported [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cost of sales (exclusive of depreciation and amortization shown separately below) |  | 478.3 |  | 1,416.3
Depreciation and amortization |  | 31.1 |  | 91.3
Selling, general and administrative expense |  | 49.2 |  | 144.8
Income from operations |  | 159.9 |  | 368.2
Total non-operating income (expense) |  | (2.6) |  | (10.0)
Reclassifications other than adoptions [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Depreciation and amortization |  | 0.0 |  | 0.0
Reclassifications other than adoptions [Member] | Scenario, Adjustment [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cost of sales |  | 30.4 |  | 89.1
Depreciation and amortization |  | (31.1) |  | (91.3)
Selling, general and administrative expense |  | 0.7 |  | 2.2
Income from operations |  | 0.0 |  | 0.0
Total non-operating income (expense) |  | 0.0 |  | 0.0
Accounting Standards Update 2017-07 [Member] | Scenario, Adjustment [Member] |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Cost of sales |  | (1.0) |  | (3.1)
Depreciation and amortization |  | 0.0 |  | 0.0
Selling, general and administrative expense |  | (0.6) |  | (1.7)
Income from operations |  | 1.6 |  | 4.8
Total non-operating income (expense) |  | $ (1.6) |  | $ (4.8)

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- Definition The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.2(a),(d)) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311 + Details
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