pre_text: impairment of long-lived assets based on the projection of undiscounted cash flows whenever events or changes in circumstances indicate that the carrying amounts of such assets may not be recoverable . in the event such cash flows are not expected to be sufficient to recover the recorded value of the assets , the assets are written down to their estimated fair values ( see note 5 ) . asset retirement obligations 2014effective january 1 , 2003 , the company adopted statement of financial accounting standards ( 2018 2018sfas 2019 2019 ) no . 143 , 2018 2018accounting for asset retirement obligations . 2019 2019 sfas no . 143 requires the company to record the fair value of a legal liability for an asset retirement obligation in the period in which it is incurred . when a new liability is recorded the company will capitalize the costs of the liability by increasing the carrying amount of the related long-lived asset . the liability is accreted to its present value each period and the capitalized cost is depreciated over the useful life of the related asset . upon settlement of the liability , the company settles the obligation for its recorded amount or incurs a gain or loss upon settlement . the company 2019s retirement obligations covered by sfas no . 143 include primarily active ash landfills , water treatment basins and the removal or dismantlement of certain plant and equipment . as of december 31 , 2003 and 2002 , the company had recorded liabilities of approximately $ 29 million and $ 15 million , respectively , related to asset retirement obligations . there are no assets that are legally restricted for purposes of settling asset retirement obligations . upon adoption of sfas no . 143 , the company recorded an additional liability of approximately $ 13 million , a net asset of approximately $ 9 million , and a cumulative effect of a change in accounting principle of approximately $ 2 million , after income taxes . amounts recorded related to asset retirement obligations during the years ended december 31 , 2003 were as follows ( in millions ) : .
post_text: proforma net ( loss ) income and ( loss ) earnings per share have not been presented for the years ended december 31 , 2002 and 2001 because the proforma application of sfas no . 143 to prior periods would result in proforma net ( loss ) income and ( loss ) earnings per share not materially different from the actual amounts reported for those periods in the accompanying consolidated statements of operations . had sfas 143 been applied during all periods presented the asset retirement obligation at january 1 , 2001 , december 31 , 2001 and december 31 , 2002 would have been approximately $ 21 million , $ 23 million and $ 28 million , respectively . included in other long-term liabilities is the accrual for the non-legal obligations for removal of assets in service at ipalco amounting to $ 361 million and $ 339 million at december 31 , 2003 and 2002 , respectively . deferred financing costs 2014financing costs are deferred and amortized over the related financing period using the effective interest method or the straight-line method when it does not differ materially from the effective interest method . deferred financing costs are shown net of accumulated amortization of $ 202 million and $ 173 million as of december 31 , 2003 and 2002 , respectively . project development costs 2014the company capitalizes the costs of developing new construction projects after achieving certain project-related milestones that indicate the project 2019s completion is probable . these costs represent amounts incurred for professional services , permits , options , capitalized interest , and other costs directly related to construction . these costs are transferred to construction in progress when significant construction activity commences , or expensed at the time the company determines that development of a particular project is no longer probable ( see note 5 ) . .
table: Balance at December 31, 2002 $15
table: Additional liability recorded from cumulative effect of accounting change 13
table: Accretion expense 2
table: Change in the timing of estimated cash flows (1)
table: Balance at December 31, 2003 $29
question: Analyse this data from a financial earnings document. what was the difference in millions in liabilities related to asset retirement obligations between 2003 and 2003?