Notes to consolidated financial statements  September 27, 2014 and September 28, 2013 Intangible assets Goodwill Impairment of non financial assets Deferred financing costs Employee benefits - 50 - Employee benefits include short-term employee benefits which correspond to wages and fringe benefits and are  recognized immediately in net earnings as are termination benefits which are also recorded as a liability when the  Corporation cannot  withdraw the offer of termination. Financing costs related to debt are deferred and amortized using the ef fective  interest method over the term of the  corresponding  loans. When one of these loans is repaid, the corresponding financing costs are charged to net earnings. Except for goodwill, any reversal of an impairment loss is recognized immediately in net earnings. A reversal of an  impairment loss for a CGU or group of CGUs is allocated pro rata to the assets of the CGU or group of CGUs. The  recoverable  amount of an asset increased by a reversal of an impairment loss may not exceed the carrying amount that  would have been determined, net of depreciation and amortization, if no impairment loss had been recognized for the  asset  in  prior  years. T o test for impairment, the carrying amount of an asset, CGU or group of CGUs is compared with its recoverable amount.  Generally , the  recoverable amount  is  the  higher  of  the value  in use and the  fair  value less costs  of disposal. The value  in use corresponds to the pre-tax cash flow projections from the management-approved budgets. These projections  reflect past experience and are discounted at a pre-tax rate corresponding to the expected market rate for this type of  investment.  The recoverable amount of investment properties, investment in an associate, banners, private labels and  loyalty  programs is these assets' fair value less costs of disposal. If the carrying amount exceeds the recoverable amount,  an  impairment loss in the amount of the excess is recognized in net earnings. CGU or group of CGUs' impairment losses  are  allocated pro rata to the assets of the CGU or group of CGUs, without however reducing the carrying amount of the  assets  below  the  highest of their fair value less  costs  of disposal, their value  in  use,  and  zero. Impairment  testing is conducted at the level of the asset itself, a cash generating unit (CGU) or group of CGUs. A CGU  is  the smallest identifiable group of assets that generates cash  inflows that are largely independent of the cash inflows  from other assets or groups of assets. Each store is a separate CGU. Impairment testing of warehouses is conducted  at the level of the dif ferent  groups of CGUs.  As  for goodwill and corporate assets that cannot be allocated wholly to a  single CGU, impairment testing is conducted at the level of the unique operating segment. Impairment testing of investment  properties, investment in an associate, banners, private labels and loyalty programs is conducted at the level  of  the asset itself. At each reporting date, the Corporation must determine if there is any indication of depreciation of its fixed assets,  intangible assets with finite useful lives, investment properties and investment in an associate. If any indication exists,  the  Corporation has to test the assets for impairment. Impairment testing of intangible assets with indefinite useful lives  and goodwill is  to be  done at  least annually, regardless  of  any indication  of  depreciation. Goodwill  is recognized at cost measured as the excess of purchase price over the fair value of the acquired enterprise's  identifiable net  assets  at  the date of acquisition. Goodwill  is  not amortized. The  banners that the Corporation intends to keep and operate, the private labels for which it continues to develop new  products  and the loyalty programs it intends to maintain qualify as intangible assets with indefinite useful lives. They are  recorded  at cost and  not  amortized. Intangible  assets with finite useful lives are recorded at cost and amortized on a straight-line basis over their useful lives.  The  amortization method and  estimates  of useful lives  are  reviewed annually. (Millions of dollars, unless otherwise indicated) Leasehold rights 20 to 40 years Software 3 to 10 years Improvements  and  development  of retail network loyalty  5 Prescription files 10 years