part ii , item 8 20 . pension and other benefit plans adoption of sfas 158 in september 2006 , the financial accounting standards board issued sfas 158 ( employer 2019s accounting for defined benefit pension and other postretirement plans , an amendment of fasb statements no . 87 , 88 , 106 and 132 ( r ) ) . sfas 158 required schlumberger to recognize the funded status ( i.e. , the difference between the fair value of plan assets and the benefit obligation ) of its defined benefit pension and other postretirement plans ( collectively 201cpostretirement benefit plans 201d ) in its december 31 , 2006 consolidated balance sheet , with a corresponding adjustment to accumulated other comprehensive income , net of tax . the adjustment to accumulated other comprehensive income at adoption represents the net unrecognized actuarial losses and unrecognized prior service costs which were previously netted against schlumberger 2019s postretirement benefit plans 2019 funded status in the consolidated balance sheet pursuant to the provisions of sfas 87 ( employers 2019 accounting for pensions ) and sfas 106 ( employer 2019s accounting for postretirement benefits other than pensions ) . these amounts will subsequently be recognized as net periodic postretirement cost consistent with schlumberger 2019s historical accounting policy for amortizing such amounts . the adoption of sfas 158 had no effect on schlumberger 2019s consolidated statement of income for the year ended december 31 , 2006 , or for any prior period , and it will not affect schlumberger 2019s operating results in future periods . additionally , sfas 158 did not have an effect on schlumberger 2019s consolidated balance sheet at december 31 , sfas 158 also required companies to measure the fair value of plan assets and benefit obligations as of the date of the fiscal year-end balance sheet . this provision of sfas 158 is not applicable as schlumberger already uses a measurement date of december 31 for its postretirement benefit plans . the incremental effect of applying sfas 158 on the consolidated balance sheet at december 31 , 2006 for all of schlumberger 2019s postretirement benefit plans is presented in the following table : ( stated in millions ) prior to application of sfas 158 sfas 158 adoption adjustments application of sfas 158 .
by how much did sfas 158 adoption adjustments increase postretirement benefits?
as a result of the adoption of sfas 158 , schlumberger 2019s total liabilities increased by approximately 2% ( 2 % ) and stockholders 2019 equity decreased by approximately 3% ( 3 % ) . the impact on schlumberger 2019s total assets was insignificant . united states defined benefit pension plans schlumberger and its united states subsidiary sponsor several defined benefit pension plans that cover substantially all employees hired prior to october 1 , 2004 . the benefits are based on years of service and compensation on a career-average pay basis . the funding policy with respect to qualified pension plans is to annually contribute amounts that are based upon a number of factors including the actuarial accrued liability , amounts that are deductible for income tax purposes , legal funding requirements and available cash flow . these contributions are intended to provide for benefits earned to date and those expected to be earned in the future. .