2019
2018
Gross Carrying Amount
Accumulated Amortization
Gross Carrying Amount
Accumulated Amortization
Non-amortizing intangible assets
$3,678.0
$—
$918.3
$—
Amortizing intangible assets .
1,244.2
260.8
576.6
212.1
$4,922.2
$260.8
$1,494.9
$212.1
other identifiable intangible assets were as follows : .
non-amortizing intangible assets are comprised of brands and trademarks .
amortizing intangible assets carrying a remaining weighted-average life of approximately 20 years are principally composed of customer relationships and acquired intellectual property .
for fiscal 2019 2018 and 2017 we recognized amortization expense of $ 49 .
1 million $ 34 .
9 million and $ 33 .
6 million respectively .
based on amortizing assets recognized in our consolidated balance sheet as of may 26 2019 amortization expense is estimated to average $ 58 .
3 million for each of the next five years with a high expense of $ 59 .
9 million in fiscal 2020 and decreasing to a low expense of $ 54 .
2 million in fiscal 2024 .
during fiscal 2019 in conjunction with the divestiture of our italian-based frozen pasta business gelit we reclassified $ 15 .
1 million and $ 1 .
7 million of goodwill and other identifiable intangible assets respectively to noncurrent assets held for sale for periods prior to the divestiture .
during fiscal 2019 as a result of our annual impairment test for indefinite lived intangibles we recognized impairment charges of $ 76 .
5 million for our chef boyardee ® and red fork ® brands in our grocery & snacks segment .
we also recognized impairment charges of $ 13 .
1 million for our aylmer ® and sundrop ® brands in our international segment .
during fiscal 2018 as a result of our annual impairment test for indefinite lived intangibles we recognized impairment charges of $ 4 .
0 million for our hk anderson ® red fork ® and salpica ® brands in our grocery & snacks segment .
we also recognized an impairment charge of $ 0 .
8 million for our aylmer ® brand in our international segment .
during fiscal 2017 we recorded goodwill impairment charges in our international reporting segment totaling $ 198 .
9 million of which $ 139 .
2 million related to our canadian reporting unit and $ 59 .
7 million related to our mexican reporting unit .
these impairment charges resulted from a change in reporting segments which occurred in the first quarter of fiscal 2017 when we were required to determine new reporting units at a lower level and from further deterioration in forecasted sales and profits during fiscal 2017 which were caused primarily by changes in foreign exchange rates .
in fiscal 2017 due to declining sales of certain brands we elected to perform a quantitative impairment test for indefinite lived intangibles of those brands .
during fiscal 2017 we recognized impairment charges of $ 31 .
5 million for our del monte ® brand and $ 5 .
5 million for our aylmer ® brand in our international segment .
we also recognized impairment charges of $ 67 .
1 million for our chef boyardee ® brand and $ 1 .
1 million for our fiddle faddle ® brand in our grocery & snacks segment .
notes to consolidated financial statements - -continued fiscal years ended may 26 2019 may 27 2018 and may 28 2017 -columnar dollars in millions except per share amounts .

Question: What do non-amortizing intangible assets comprise of?

Question: What was the impairment charges for Grocery & Snacks  during fiscal 2019?

Question: What was the accumulated amortization of fiscal years 2018 and 2019, respectively?

Question: What is the ratio of amortization expense to accumulated amortization in the fiscal year 2019?

Question: What is the percentage change in the total gross carrying amount of intangible assets from 2018 to 2019?

Question: What is the proportion of gross carrying amount of  Non-amortizing intangible assets over the total gross carrying amount of intangible assets in 2018?