Cover Page - USD ($)
$ in Millions

12 Months Ended

Dec. 31, 2019

Feb. 14, 2020

Jun. 28, 2019

Cover page.

Document Type

10-K

Document Period End Date

Dec. 31, 2019

Entity File Number

000-29472

Entity Registrant Name

Amkor Technology, Inc.

Entity Incorporation, State or Country Code

DE

Entity Tax Identification Number

23-1722724

Entity Address, Address Line One

2045 East Innovation Circle

Entity Address, City or Town

Tempe

Entity Address, State or Province

AZ

Entity Address, Postal Zip Code

85284

City Area Code

480

Local Phone Number

821-5000

Title of 12(b) Security

Common Stock, $0.001 par value

Trading Symbol

AMKR

Security Exchange Name

NASDAQ

Entity Well-known Seasoned Issuer

Yes

Entity Voluntary Filers

No

Entity Current Reporting Status

Yes

Entity Interactive Data Current

Yes

Entity Filer Category

Large Accelerated Filer

Entity Small Business

false

Entity Emerging Growth Company

false

Entity Shell Company

false

Entity Public Float

$ 727

Entity Common Stock, Shares Outstanding

241,055,987

Documents Incorporated by Reference [Text Block]

DOCUMENTS INCORPORATED BY REFERENCE:

Portions of the registrant’s Proxy Statement relating to its 2020 Annual Meeting of Stockholders, to be filed subsequently, are incorporated by reference into Part III of this Report where indicated.

Entity Central Index Key

0001047127

Current Fiscal Year End Date

--12-31

Document Fiscal Year Focus

2019

Document Fiscal Period Focus

FY

Amendment Flag

false

Document Annual Report

true

Document Transition Report

false