Stockholders' Equity Note Disclosure [Text Block] | 11. We have 2,000,000,000 June 30, 2021 and December 31, 2020 . Our common shares have rights to any dividend declared by the board of directors (the "Board"), subject to any preferential or other rights of any outstanding preferred stock, and voting rights to elect all current members of the Board. At June 30, 2021 December 31, 2020, We have 80,000,000 shares of authorized preferred stock, par value $0.001 per share. The preferred shares have preferential rights over the common shares with respect to dividends and net distribution upon liquidation. We did not June 30, 2021 and December 31, 2020. On February 17, 2021 April 28, 2021, March 15, 2021 June 15, 2021, six June 30, 2021 2020 Share Repurchase Program Since May 2010, o $4,100.0 million of our common stock through our Repurchase Program, inclusive of the $300.0 million authorization approved by our Board on February 16, 2021. 2010, June 30, 2021 , we had $328.8 million no 2021 "2021 2013 "2013 2009 "2009 no may In December 2020 March 2021, Share Repurchase ("ASR") agreements to repurchase shares of our common stock for an aggregate purchase price of $50.0 million and $125.0 million with HSBC Bank USA, N.A and Citibank, N.A., respectively. The ASR agreements are each accounted as a treasury stock transaction and forward stock purchase agreement indexed to our common stock. The forward stock purchase agreement is classified as an equity instrument under ASC 815 40, Contracts in Entity's Own Equity ("ASC 815 40" zero January 4, 2021 April 1, 2021, February 2021 May 2021, six months ended June 30, 2021 . These repurchases of 951,402 shares for six June 30, 2021 During the six June 30, 2021 d 1,394,538 shares of common stock with an aggregate value of $250.0 million as part of the Repurchase Program, inclusive of the ASR, at a weighted average price of $179.27 per s Treasury Stock As of June 30, 2021 ry stock consisted of 382,076,719 shares of common stock, carried at cost. During the six months ended June 30, 2021 , we transferred 503,331 shares of common stock from the treasury shares at a weighted average treasury stock price of $11.33 per share. Earnings Per Share Basic EPS is computed by dividing net income attributable to Verisk by the weighted average number of common shares outstanding during the period. The computation of diluted EPS is similar to the computation of basic EPS except that the denominator is increased to include the number of additional common shares that would have been outstanding, using the treasury stock method, if the dilutive potential common shares, including vested and nonvested stock options, nonvested restricted stock awards, nonvested restricted stock units, nonvested performance awards consisting of performance share units ("PSU"), and nonvested deferred stock units, had been issued. The following is a presentation of the numerators and denominators of the basic and diluted EPS computations for the three six June 30, 2021 2020 Three Months Ended June 30, Six Months Ended June 30, 2021 2020 2021 2020 Numerator used in basic and diluted EPS: Net income attributable to Verisk $ 154.0 $ 179.0 $ 322.6 $ 350.7 Denominator: Weighted average number of common shares used in basic EPS 162,007,784 162,371,920 162,324,802 162,633,113 Effect of dilutive shares: Potential common shares issuable from stock options and stock awards 1,038,754 2,731,168 1,416,826 2,780,491 Weighted average number of common shares and dilutive potential common shares used in diluted EPS 163,046,538 165,103,088 163,741,628 165,413,604 The potential shares of common stock that were excluded from diluted E PS were 785,547 and 975,710 for the three June 30, 2021 2020 six June 30, 2021 2020 Accumulated Other Comprehensive Losses The following is a summary of accumulated other comprehensive losses as of June 30, 2021 December 31, 2020 2021 2020 Foreign currency translation adjustment $ (267.0 ) $ (292.2 ) Pension and postretirement adjustment, net of tax (81.9 ) (83.5 ) Accumulated other comprehensive losses $ (348.9 ) $ (375.7 ) The before tax and after tax amounts of other comprehensive income (loss) for the three six June 30, 2021 2020 Before Tax Tax (Expense) Benefit After Tax For the Three Months Ended June 30, 2021 Foreign currency translation adjustment $ 16.5 $ — $ 16.5 Pension and postretirement adjustment before reclassifications 2.0 (0.6 ) 1.4 Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive losses (1) (0.9 ) 0.3 (0.6 ) Pension and postretirement adjustment 1.1 (0.3 ) 0.8 Total other comprehensive income $ 17.6 $ (0.3 ) $ 17.3 For the Three Months Ended June 30, 2020 Foreign currency translation adjustment $ (0.1 ) $ — $ (0.1 ) Pension and postretirement adjustment before reclassifications 4.1 (0.9 ) 3.2 Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive losses (1) (2.1 ) 0.5 (1.6 ) Pension and postretirement adjustment 2.0 (0.4 ) 1.6 Total other comprehensive income $ 1.9 $ (0.4 ) $ 1.5 Before Tax Tax (Expense) Benefit After Tax For the Six Months Ended June 30, 2021 Foreign currency translation adjustment $ 25.2 $ — $ 25.2 Pension and postretirement adjustment before reclassifications 4.1 (1.0 ) 3.1 Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive losses (1) (2.0 ) 0.5 (1.5 ) Pension and postretirement adjustment 2.1 (0.5 ) 1.6 Total other comprehensive income $ 27.3 $ (0.5 ) $ 26.8 For the Six Months Ended June 30, 2020 Foreign currency translation adjustment $ (172.7 ) $ — $ (172.7 ) Pension and postretirement adjustment before reclassifications 6.2 (1.5 ) 4.7 Amortization of net actuarial loss and prior service benefit reclassified from accumulated other comprehensive losses (1) (3.1 ) 0.8 (2.3 ) Pension and postretirement adjustment 3.1 (0.7 ) 2.4 Total other comprehensive loss $ (169.6 ) $ (0.7 ) $ (170.3 ) _______________ ( 1 These accumulated other comprehensive loss components, before tax, are included under "Cost of revenues" and "Selling, general and administrative" in our accompanying condensed consolidated statements of operations. These components are also included in the computation of net periodic (benefit) cost (see Note 13 |