pre_text: devon energy corporation and subsidiaries notes to consolidated financial statements 2013 ( continued ) asset divestitures in conjunction with the asset divestitures in 2013 and 2014 , devon removed $ 26 million and $ 706 million of goodwill , respectively , which were allocated to these assets . impairment devon 2019s canadian goodwill was originally recognized in 2001 as a result of a business combination consisting almost entirely of conventional gas assets that devon no longer owns . as a result of performing the goodwill impairment test described in note 1 , devon concluded the implied fair value of its canadian goodwill was zero as of december 31 , 2014 . this conclusion was largely based on the significant decline in benchmark oil prices , particularly after opec 2019s decision not to reduce its production targets that was announced in late november 2014 . consequently , in the fourth quarter of 2014 , devon wrote off its remaining canadian goodwill and recognized a $ 1.9 billion impairment . other intangible assets as of december 31 , 2014 , intangible assets associated with customer relationships had a gross carrying amount of $ 569 million and $ 36 million of accumulated amortization . the weighted-average amortization period for the customer relationships is 13.7 years . amortization expense for intangibles was approximately $ 36 million for the year ended december 31 , 2014 . other intangible assets are reported in other long-term assets in the accompanying consolidated balance sheets . the following table summarizes the estimated aggregate amortization expense for the next five years . year amortization amount ( in millions ) .
post_text: .
table: Year Amortization Amount  (In millions)
table: 2015 $45
table: 2016 $45
table: 2017 $45
table: 2018 $45
table: 2019 $44
question: Analyse this data from a financial earnings document. in 2014 , what percentage of the total amortization amount was from intangibles?