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Recently Issued and Adopted Accounting Pronouncements and Regulatory Items ASU 2017-07 Reclassifications (Details) - USD ($) $ in Millions | 3 Months Ended
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Mar. 31, 2018 | Mar. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Selling, general and administrative expenses | $ 200.4 | $ 114.3
Pension and other postretirement benefits | $ 0.5 | (4.6)
As Reported |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Selling, general and administrative expenses |  | 109.7
Pension and other postretirement benefits |  | 0.0
Reclassification |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Selling, general and administrative expenses |  | (4.6)
Pension and other postretirement benefits |  | 4.6
Accounting Standards Update 2017-07 |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Pension and other postretirement benefits |  | $ (4.6)

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- Definition Non-operating pension and postretirement costs are defined as those costs related to interest, expected return on plan assets, amortized actuarial gains and losses and the impacts of any plan curtailments or settlements. + References No definition available. + 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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