XML 31 R50.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Other Comprehensive Income (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Other Comprehensive Income [Abstract] |
Other Comprehensive (Loss) Income | The following table presents the tax effect allocated to each component of other comprehensive (loss) income for each period presented:
| Before-Tax |  | Income Tax |  | Net-of-Tax
| Amount |  | (Expense) Benefit |  | Amount
2011 |  |  |  |  |
Defined benefit pension plan and VEBAs: |  |  |  |  |
Net actuarial loss arising during the period | $ | (110.6 | ) |  | $ | 42.2 |  |  | $ | (68.4 | )
Reclassification adjustments: |  |  |  |  |
Less: amortization of net actuarial gain | 0.6 |  |  | (0.2 | ) |  | 0.4 |
Less: amortization of prior service cost | 4.2 |  |  | (1.6 | ) |  | 2.6 |
Total loss recognized in Accumulated other comprehensive loss related to defined benefit pension plan and VEBAs | (105.8 | ) |  | 40.4 |  |  | (65.4 | )
Unrealized loss on available for sale securities | (0.1 | ) |  | — |  |  | (0.1 | )
Foreign currency translation adjustment | 0.2 |  |  | — |  |  | 0.2 |
Other comprehensive loss | $ | (105.7 | ) |  | $ | 40.4 |  |  | $ | (65.3 | )
2010 |  |  |  |  |
Defined benefit pension plan and VEBAs: |  |  |  |  |
Net actuarial gain arising during the period | $ | 25.5 |  |  | $ | (9.7 | ) |  | $ | 15.8 |
Reclassification adjustments: |  |  |  |  |
Less: amortization of net actuarial gain | 0.7 |  |  | (0.2 | ) |  | 0.5 |
Less: amortization of prior service cost | 4.2 |  |  | (1.6 | ) |  | 2.6 |
Total income recognized in Accumulated other comprehensive income related to defined benefit pension plans | 30.4 |  |  | (11.5 | ) |  | 18.9 |
Unrealized gain on available for sale securities | 0.1 |  |  | — |  |  | 0.1 |
Foreign currency translation adjustment | (0.5 | ) |  | — |  |  | (0.5 | )
Other comprehensive income | $ | 30.0 |  |  | $ | (11.5 | ) |  | $ | 18.5 |
2009 |  |  |  |  |
Defined benefit pension plan and VEBAs: |  |  |  |  |
Net actuarial gain arising during the period | $ | 66.3 |  |  | $ | (25.0 | ) |  | $ | 41.3 |
Prior service cost arising during the period | (33.8 | ) |  | 12.7 |  |  | (21.1 | )
Reclassification adjustments |  |  |  |  |
Less: amortization of net actuarial loss | 3.8 |  |  | (1.4 | ) |  | 2.4 |
Less: amortization of prior service cost | 1.6 |  |  | (0.6 | ) |  | 1.0 |
Total income recognized in Accumulated other comprehensive income related to defined benefit pension plans | 37.9 |  |  | (14.3 | ) |  | 23.6 |
Foreign currency translation adjustment | (1.5 | ) |  | — |  |  | (1.5 | )
Other comprehensive income | $ | 36.4 |  |  | $ | (14.3 | ) |  | $ | 22.1 |

X
- Details
Name: | kalu_OtherComprehensiveIncomeAbstract
Namespace Prefix: | kalu_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (i) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfAmountsRecognizedInOtherComprehensiveIncomeLossTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration