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Accumulated Other Comprehensive Loss | 6 Months Ended
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Jul. 31, 2017
Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] |
Accumulated Other Comprehensive Loss | Accumulated Other Comprehensive Loss Accumulated other comprehensive loss, net of taxes, consisted of the following at July 31, 2017:
| Net Unrealized Gains (Losses) on Derivative Instruments |  | Net Unrealized Gains (Losses) on Available-for-Sale Securities |  | Defined Benefit Pension Components |  | Foreign Currency Translation Adjustments |  | Total
Balances, January 31, 2017 | $ | 14.6 |  |  | $ | 1.5 |  |  | $ | (33.8 | ) |  | $ | (160.8 | ) |  | $ | (178.5 | )
Other comprehensive (loss) income before reclassifications | (12.8 | ) |  | 0.1 |  |  | (0.1 | ) |  | 39.4 |  |  | 26.6 |
Pre-tax (gains) losses reclassified from accumulated other comprehensive loss | (1.6 | ) |  | — |  |  | (0.1 | ) |  | 0.1 |  |  | (1.6 | )
Tax effects | 1.4 |  |  | 0.1 |  |  | — |  |  | (0.9 | ) |  | 0.6 |
Net current period other comprehensive (loss) income | (13.0 | ) |  | 0.2 |  |  | (0.2 | ) |  | 38.6 |  |  | 25.6 |
Balances, July 31, 2017 | $ | 1.6 |  |  | $ | 1.7 |  |  | $ | (34.0 | ) |  | $ | (122.2 | ) |  | $ | (152.9 | )
Reclassifications related to gains and losses on available-for-sale securities are included in "Interest and other expense, net." Refer to Note 4, "Financial Instruments," for the amount and location of reclassifications related to derivative instruments. Reclassifications of the defined benefit pension components are included in the computation of net periodic benefit cost. For further information, see the "Retirement Benefit Plans" note in Part II, Item 8 of our Annual Report on Form 10-K for the fiscal year ended January 31, 2017.

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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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