Financial report context:
notes to consolidated financial statements ( continued ) note 1 2014summary of significant accounting policies ( continued ) asset retirement obligations the company records obligations associated with the retirement of tangible long-lived assets and the associated asset retirement costs in accordance with sfas no . 143 , accounting for asset retirement obligations . the company reviews legal obligations associated with the retirement of long-lived assets that result from the acquisition , construction , development and/or normal use of the assets . if it is determined that a legal obligation exists , the fair value of the liability for an asset retirement obligation is recognized in the period in which it is incurred if a reasonable estimate of fair value can be made . the fair value of the liability is added to the carrying amount of the associated asset and this additional carrying amount is depreciated over the life of the asset . the difference between the gross expected future cash flow and its present value is accreted over the life of the related lease as an operating expense . all of the company 2019s existing asset retirement obligations are associated with commitments to return property subject to operating leases to original condition upon lease termination . the following table reconciles changes in the company 2019s asset retirement liabilities for fiscal 2004 and 2005 ( in millions ) : .

Financial table:
asset retirement liability as of september 27 2003: additional asset retirement obligations recognized; $ 7.2: 0.5
asset retirement liability as of september 27 2003: accretion recognized; $ 7.2: 0.5
asset retirement liability as of september 27 2003: asset retirement liability as of september 25 2004; $ 7.2: $ 8.2
asset retirement liability as of september 27 2003: additional asset retirement obligations recognized; $ 7.2: 2.8
asset retirement liability as of september 27 2003: accretion recognized; $ 7.2: 0.7
asset retirement liability as of september 27 2003: asset retirement liability as of september 24 2005; $ 7.2: $ 11.7

Additional report context:
cumulative effects of accounting changes in 2003 , the company recognized a net favorable cumulative effect type adjustment of approximately $ 1 million from the adoption of sfas no . 150 , accounting for certain financial instruments with characteristic of both liabilities and equity and sfas no . 143 . long-lived assets including goodwill and other acquired intangible assets the company reviews property , plant , and equipment and certain identifiable intangibles , excluding goodwill , for impairment whenever events or changes in circumstances indicate the carrying amount of an asset may not be recoverable . recoverability of these assets is measured by comparison of its carrying amount to future undiscounted cash flows the assets are expected to generate . if property , plant , and equipment and certain identifiable intangibles are considered to be impaired , the impairment to be recognized equals the amount by which the carrying value of the assets exceeds its fair market value . for the three fiscal years ended september 24 , 2005 , the company had no material impairment of its long-lived assets , except for the impairment of certain assets in connection with the restructuring actions described in note 5 of these notes to consolidated financial statements . sfas no . 142 , goodwill and other intangible assets requires that goodwill and intangible assets with indefinite useful lives should not be amortized but rather be tested for impairment at least annually or sooner whenever events or changes in circumstances indicate that they may be impaired . the company performs its goodwill impairment tests on or about august 30 of each year . the company did not recognize any goodwill or intangible asset impairment charges in 2005 , 2004 , or 2003 . the company established reporting units based on its current reporting structure . for purposes of testing goodwill for .

Question: what was the change in asset retirement liability between september 2004 and 2005 , in millions?
Answer: 3.5