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Other Operating Credits and Charges, Net Non-Operating Income and Expense (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Other Income and Expenses [Abstract] |  |  |
Interest Expense | $ (18.0) | $ (19.0) | $ (20.0)
Interest expense, net of capitalized interest | (19.0) | (16.0) | (19.0)
Investment Income, Interest and Dividend | 9.0 | 18.0 | 10.0
Gain on securities | 0.0 | 1.0 | 0.0
Interest Income, Other | 1.0 | (1.0) | 1.0
Investment income | 10.0 | 18.0 | 11.0
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component | (3.0) | (4.0) | (10.0)
Foreign Currency Transaction Gain (Loss), Realized | (5.0) | 0.0 | (4.0)
Gain on Acquisition | 14.0 | 0.0 | 0.0
Other nonoperating items | 6.0 | (4.0) | (14.0)
Nonoperating Income (Expense) | (3.0) | (2.0) | (23.0)
Amortization of financing costs and discounts | 2.0 | 1.0 | 1.0
Interest Costs Capitalized Adjustment | $ 1.0 | $ 4.0 | $ 2.0

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- Definition Amount of amortization expense attributable to debt discount (premium) and debt issuance costs. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399 + Details
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- Definition In a business combination achieved in stages, this element represents the amount of gain recognized by the entity as a result of remeasuring to fair value the equity interest in the acquiree it held before the business combination. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g)(2) -URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463 + Details
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- Definition Amount before tax of foreign currency transaction realized gain (loss) recognized in the income statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30690-110894 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6450222&loc=d3e30840-110895 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 830 -SubTopic 20 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109240200&loc=d3e30700-110894 + Details
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