notes to consolidated financial statements 2013 ( continued ) ( amounts in millions , except per share amounts ) guarantees we have guarantees of certain obligations of our subsidiaries relating principally to credit facilities , certain media payables and operating leases of certain subsidiaries . the amount of such parent company guarantees was $ 769.3 and $ 706.7 as of december 31 , 2009 and 2008 , respectively . in the event of non-payment by the applicable subsidiary of the obligations covered by a guarantee , we would be obligated to pay the amounts covered by that guarantee . as of december 31 , 2009 , there are no material assets pledged as security for such parent company guarantees . contingent acquisition obligations the following table details the estimated future contingent acquisition obligations payable in cash as of december 31 , 2009 . the estimated amounts listed would be paid in the event of exercise at the earliest exercise date . see note 6 for further information relating to the payment structure of our acquisitions . all payments are contingent upon achieving projected operating performance targets and satisfying other conditions specified in the related agreements and are subject to revisions as the earn-out periods progress. .
what percentage decrease occurred from 2011-2012 for deferred acquisition payments?
1 we have entered into certain acquisitions that contain both redeemable noncontrolling interests and call options with similar terms and conditions . in such instances , we have included the related estimated contingent acquisition obligation in the period when the earliest related option is exercisable . we have certain redeemable noncontrolling interests that are exercisable at the discretion of the noncontrolling equity owners as of december 31 , 2009 . as such , these estimated acquisition payments of $ 20.5 have been included within the total payments expected to be made in 2010 in the table and , if not made in 2010 , will continue to carry forward into 2011 or beyond until they are exercised or expire . redeemable noncontrolling interests are included in the table at current exercise price payable in cash , not at applicable redemption value in accordance with the authoritative guidance for classification and measurement of redeemable securities . legal matters we are involved in legal and administrative proceedings of various types . while any litigation contains an element of uncertainty , we do not believe that the outcome of such proceedings will have a material adverse effect on our financial condition , results of operations or cash flows . note 16 : recent accounting standards in december 2009 , the financial accounting standards board ( 201cfasb 201d ) amended authoritative guidance related to accounting for transfers and servicing of financial assets and extinguishments of liabilities . the guidance will be effective for the company beginning january 1 , 2010 . the guidance eliminates the concept of a qualifying special-purpose entity and changes the criteria for derecognizing financial assets . in addition , the guidance will require additional disclosures related to a company 2019s continued involvement with financial assets that have been transferred . we do not expect the adoption of this amended guidance to have a significant impact on our consolidated financial statements . in december 2009 , the fasb amended authoritative guidance for consolidating variable interest entities . the guidance will be effective for the company beginning january 1 , 2010 . specifically , the guidance revises factors that should be considered by a reporting entity when determining whether an entity that is insufficiently capitalized or is not controlled through voting ( or similar rights ) should be consolidated . this guidance also includes revised financial statement disclosures regarding the reporting entity 2019s involvement , including significant risk exposures as a result of that involvement , and the impact the relationship has on the reporting entity 2019s financial statements . we are currently evaluating the potential impact of the amended guidance on our consolidated financial statements. .