XML 77 R67.htm IDEA: XBRL DOCUMENT
v3.23.3

Business, Product and Geographical Area Information - Schedule of Income Taxes Paid by Geographical Area (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Income Taxes Paid By Geographical Area [Line Items] |  |  |
Income taxes paid | $ 1.9 | $ 0.5 | $ 5.3
Domestic |  |  |
Income Taxes Paid By Geographical Area [Line Items] |  |  |
Income taxes paid | 0.3 | 0.3 | 2.7
Foreign |  |  |
Income Taxes Paid By Geographical Area [Line Items] |  |  |
Income taxes paid | $ 1.6 | $ 0.2 | $ 2.6

X
- Definition Income taxes paid by geographical area. + References No definition available. + Details
Name: | kalu_IncomeTaxesPaidByGeographicalAreaLineItems
Namespace Prefix: | kalu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482913/230-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482740/230-10-45-25 + Details
Name: | us-gaap_IncomeTaxesPaid
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_StatementGeographicalAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_StatementGeographicalAxis=us-gaap_NonUsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |