notes to consolidated financial statements 2013 ( continued ) ( amounts in millions , except per share amounts ) guarantees we have guaranteed certain obligations of our subsidiaries relating principally to operating leases and credit facilities of certain subsidiaries . the amount of parent company guarantees on lease obligations was $ 410.3 and $ 385.1 as of december 31 , 2012 and 2011 , respectively , and the amount of parent company guarantees primarily relating to credit facilities was $ 283.4 and $ 327.5 as of december 31 , 2012 and 2011 , 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 , 2012 , there were 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 .
what is the mathematical range for tedeemable noncontrolling interests and call options with affiliates from 2013-2017?
1 we have entered into certain acquisitions that contain both redeemable noncontrolling interests and call options with similar terms and conditions . we have certain redeemable noncontrolling interests that are exercisable at the discretion of the noncontrolling equity owners as of december 31 , 2012 . these estimated payments of $ 16.4 are included within the total payments expected to be made in 2013 , and will continue to be carried forward into 2014 or beyond until exercised or expired . 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 . 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 . legal matters we are involved in various legal proceedings , and subject to investigations , inspections , audits , inquiries and similar actions by governmental authorities , arising in the normal course of business . we evaluate all cases each reporting period and record liabilities for losses from legal proceedings when we determine that it is probable that the outcome in a legal proceeding will be unfavorable and the amount , or potential range , of loss can be reasonably estimated . in certain cases , we cannot reasonably estimate the potential loss because , for example , the litigation is in its early stages . while any outcome related to litigation or such governmental proceedings in which we are involved cannot be predicted with certainty , management believes that the outcome of these matters , individually and in the aggregate , will not have a material adverse effect on our financial condition , results of operations or cash flows . note 15 : recent accounting standards impairment of indefinite-lived intangible assets in july 2012 , the financial accounting standards board ( 201cfasb 201d ) issued amended guidance to simplify impairment testing of indefinite-lived intangible assets other than goodwill . the amended guidance permits an entity to first assess qualitative factors to determine whether it is 201cmore likely than not 201d that the indefinite-lived intangible asset is impaired . if , after assessing qualitative factors , an entity concludes that it is not 201cmore likely than not 201d that the indefinite-lived intangible .