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Accumulated Other Comprehensive Loss | 3 Months Ended
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Mar. 31, 2018
Equity [Abstract] |
Accumulated Other Comprehensive Loss | Note 12 - Accumulated other comprehensive loss: Changes in accumulated other comprehensive loss are presented in the table below. See Note 4 for further discussion of our marketable securities, Note 10 for discussion of our defined benefit pension plans and OPEB plans, and Note 14 for discussion of our interest rate swap contract.
| Three months ended |
| March 31, |
| 2017 |  |  | 2018 |
| (In millions) |
Accumulated other comprehensive loss, net of tax: |  |  |  |  |  |  |
Currency translation: |  |  |  |  |  |  |
Balance at beginning of period | $ | (269.6 | ) |  | $ | (211.9 | )
Other comprehensive income |  | 9.0 |  |  |  | 10.7 |
Balance at end of period | $ | (260.6 | ) |  | $ | (201.2 | )
Marketable securities: |  |  |  |  |  |  |
Balance at beginning of period | $ | 1.8 |  |  | $ | 4.8 |
Change in accounting principle |  | - |  |  |  | (4.8 | )
Balance at beginning of period, as adjusted |  | 1.8 |  |  |  | - |
Other comprehensive loss - unrealized losses arising during the period |  | (.2 | ) |  |  | - |
Balance at end of period | $ | 1.6 |  |  | $ | - |
Defined benefit pension plans: |  |  |  |  |  |  |
Balance at beginning of period | $ | (184.8 | ) |  | $ | (172.8 | )
Other comprehensive income - amortization of prior service cost and net losses included in net periodic pension cost |  | 3.1 |  |  |  | 2.4 |
Balance at end of period | $ | (181.7 | ) |  | $ | (170.4 | )
OPEB plans: |  |  |  |  |  |  |
Balance at beginning of period | $ | 1.8 |  |  | $ | 1.2 |
Other comprehensive loss - amortization of prior service credit and net losses included in net periodic OPEB cost |  | (.1 | ) |  |  | (.1 | )
Balance at end of period | $ | 1.7 |  |  | $ | 1.1 |
Interest rate swap: |  |  |  |  |  |  |
Balance at beginning of period | $ | (2.0 | ) |  | $ | - |
Other comprehensive income - reclassification adjustment for amounts included in earnings |  | .6 |  |  |  | - |
Balance at end of period | $ | (1.4 | ) |  | $ | - |
Total accumulated other comprehensive loss: |  |  |  |  |  |  |
Balance at beginning of period | $ | (452.8 | ) |  | $ | (378.7 | )
Change in accounting principle |  | - |  |  |  | (4.8 | )
Balance at beginning of period, as adjusted |  | (452.8 | ) |  |  | (383.5 | )
Other comprehensive income |  | 12.4 |  |  |  | 13.0 |
Balance at end of period | $ | (440.4 | ) |  | $ | (370.5 | )

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- Definition The entire disclosure for comprehensive income, which includes, but is not limited to, 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -URI http://asc.fasb.org/topic&trid=2134417 + Details
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