XML 45 R43.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Pension and Other Postretirement Benefits (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2011
Pension and Other Postretirement Benefits [Abstract] |
Change in benefit obligations and plan assets | The change in benefit obligations and change in plan assets as of December 31 are as follows:
|  | Pension |  |  | OPEB |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation at beginning of year |  | $ | 130,427 |  |  | $ | 114,181 |  |  | $ | 109,717 |  |  | $ | 186,384 |
Service cost |  |  | 3,133 |  |  |  | 2,979 |  |  |  | 1,668 |  |  |  | 3,534 |
Interest cost |  |  | 6,976 |  |  |  | 6,407 |  |  |  | 5,728 |  |  |  | 10,402 |
Plan changes |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (112,487 | )
Medicare Part D |  |  | - |  |  |  | - |  |  |  | 160 |  |  |  | 538 |
Actuarial loss |  |  | 30,490 |  |  |  | 8,762 |  |  |  | 24,786 |  |  |  | 26,996 |
Benefits paid |  |  | (7,608 | ) |  |  | (6,458 | ) |  |  | (7,770 | ) |  |  | (6,038 | )
Curtailment/special termination benefits |  |  | 1,147 |  |  |  | 4,556 |  |  |  | - |  |  |  | 388 |
Benefit obligation at end of year |  | $ | 164,565 |  |  | $ | 130,427 |  |  | $ | 134,289 |  |  | $ | 109,717 |
|  | Pension |  |  | OPEB |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  | $ | 73,878 |  |  | $ | 69,626 |  |  | $ | - |  |  | $ | - |
Actual return on plan assets |  |  | (307 | ) |  |  | 8,815 |  |  |  | - |  |  |  | - |
Employer contributions |  |  | 19,004 |  |  |  | 1,895 |  |  |  | 7,770 |  |  |  | 6,038 |
Benefits paid |  |  | (7,608 | ) |  |  | (6,458 | ) |  |  | (7,770 | ) |  |  | (6,038 | )
Fair value of assets at end of year |  | $ | 84,967 |  |  | $ | 73,878 |  |  | $ | - |  |  | $ | - |
Amounts recognized in the statement of financial position |
|  | Pension |  |  | OPEB |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Funded status of plans: |  |  |  |  |  |  |  |  |  |  |  |
Funded status |  | $ | (79,598 | ) |  | $ | (56,549 | ) |  | $ | (134,289 | ) |  | $ | (109,717 | )
Amounts recognized in the Statement of Financial Position: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities |  | $ | (8,699 | ) |  | $ | (18,754 | ) |  | $ | (6,211 | ) |  | $ | (6,409 | )
Non-current liabilities |  |  | (70,899 | ) |  |  | (37,795 | ) |  |  | (128,078 | ) |  |  | (103,308 | )
Net amount recognized |  | $ | (79,598 | ) |  | $ | (56,549 | ) |  | $ | (134,289 | ) |  | $ | (109,717 | )
Amounts recognized in accumulated other comprehensive loss (pre-tax): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | 80,092 |  |  | $ | 44,527 |  |  | $ | 89,420 |  |  | $ | 79,697 |
Prior service cost (benefit) |  |  | 608 |  |  |  | 746 |  |  |  | (27,861 | ) |  |  | (60,674 | )
|  | $ | 80,700 |  |  | $ | 45,273 |  |  | $ | 61,559 |  |  | $ | 19,023 |
Amounts recognized in accumulated other comprehensive loss (pre-tax) |
|  | Pension |  |  | OPEB |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Funded status of plans: |  |  |  |  |  |  |  |  |  |  |  |
Funded status |  | $ | (79,598 | ) |  | $ | (56,549 | ) |  | $ | (134,289 | ) |  | $ | (109,717 | )
Amounts recognized in the Statement of Financial Position: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Current liabilities |  | $ | (8,699 | ) |  | $ | (18,754 | ) |  | $ | (6,211 | ) |  | $ | (6,409 | )
Non-current liabilities |  |  | (70,899 | ) |  |  | (37,795 | ) |  |  | (128,078 | ) |  |  | (103,308 | )
Net amount recognized |  | $ | (79,598 | ) |  | $ | (56,549 | ) |  | $ | (134,289 | ) |  | $ | (109,717 | )
Amounts recognized in accumulated other comprehensive loss (pre-tax): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net loss |  | $ | 80,092 |  |  | $ | 44,527 |  |  | $ | 89,420 |  |  | $ | 79,697 |
Prior service cost (benefit) |  |  | 608 |  |  |  | 746 |  |  |  | (27,861 | ) |  |  | (60,674 | )
|  | $ | 80,700 |  |  | $ | 45,273 |  |  | $ | 61,559 |  |  | $ | 19,023 |
Pension plans projected benefit obligation, accumulated benefit obligation and fair value of plan assets | Our pension plans' projected benefit obligation, accumulated benefit obligation, and fair value of plan assets as of December 31 are as follows:
|  | Projected Benefit Obligation |  |  | Accumulated Benefit Obligation |  |  | Fair Value of Plan assets |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Hourly pension plan |  | $ | 75,216 |  |  | $ | 61,291 |  |  | $ | 74,545 |  |  | $ | 61,276 |  |  | $ | 47,984 |  |  | $ | 40,940 |
Salaried pension plan |  |  | 64,655 |  |  |  | 49,478 |  |  |  | 58,742 |  |  |  | 45,633 |  |  |  | 36,982 |  |  |  | 32,938 |
Supplemental executive benefits pension (“SERB”) plan |  |  | 24,694 |  |  |  | 19,658 |  |  |  | 23,461 |  |  |  | 19,143 |  |  |  | - |  |  |  | - |
Total |  | $ | 164,565 |  |  | $ | 130,427 |  |  | $ | 156,748 |  |  | $ | 126,052 |  |  | $ | 84,966 |  |  | $ | 73,878 |
Components of net periodic benefit cost and other amounts recognized in other comprehensive income | Components of Net periodic benefit cost and other amounts recognized in other comprehensive income:
Net Periodic Benefit Cost: |
|  | Year Ended December 31, |
|  | Pension |  |  | OPEB |
|  | 2011 |  |  | 2010 |  |  | 2009 |  |  | 2011 |  |  | 2010 |  |  | 2009 |
Service cost |  | $ | 3,133 |  |  | $ | 2,979 |  |  | $ | 2,784 |  |  | $ | 1,668 |  |  | $ | 3,534 |  |  | $ | 3,542 |
Interest cost |  |  | 6,976 |  |  |  | 6,407 |  |  |  | 6,482 |  |  |  | 5,728 |  |  |  | 10,402 |  |  |  | 11,007 |
Expected return on plan assets |  |  | (6,631 | ) |  |  | (5,376 | ) |  |  | (4,336 | ) |  |  | - |  |  |  | - |  |  |  | - |
Amortization of prior service costs |  |  | 137 |  |  |  | 137 |  |  |  | 162 |  |  |  | (32,814 | ) |  |  | (10,879 | ) |  |  | (1,144 | )
Amortization of net loss |  |  | 1,863 |  |  |  | 1,660 |  |  |  | 2,105 |  |  |  | 15,063 |  |  |  | 6,454 |  |  |  | 2,485 |
Net periodic benefit cost |  |  | 5,478 |  |  |  | 5,807 |  |  |  | 7,197 |  |  |  | (10,355 | ) |  |  | 9,511 |  |  |  | 15,890 |
Special termination benefits |  |  | 1,147 |  |  |  | 4,556 |  |  |  | - |  |  |  | - |  |  |  | 388 |  |  |  | - |
Effect of plan amendments |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (50,474 | ) |  |  | - |
Curtailment cost |  |  | - |  |  |  | - |  |  |  | 2,576 |  |  |  | - |  |  |  | - |  |  |  | (14,975 | )
Total net periodic benefit cost |  | $ | 6,625 |  |  | $ | 10,363 |  |  | $ | 9,773 |  |  | $ | (10,355 | ) |  | $ | (40,575 | ) |  | $ | 915 |
Other changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss (pre-tax): |
|  | Year Ended December 31, |
|  | Pension |  |  | OPEB |
|  | 2011 |  |  | 2010 |  |  | 2011 |  |  | 2010 |
Net loss |  | $ | 37,427 |  |  | $ | 5,322 |  |  | $ | 24,785 |  |  | $ | 26,996 |
Prior service benefit arising during the period |  |  | - |  |  |  | - |  |  |  | - |  |  |  | (112,488 | )
Amortization of net loss |  |  | (1,863 | ) |  |  | (1,660 | ) |  |  | (15,063 | ) |  |  | (6,455 | )
Amortization of prior service benefit (cost) |  |  | (137 | ) |  |  | (137 | ) |  |  | 32,814 |  |  |  | 10,879 |
Prior service cost (benefit) recognized due to plan amendments |  |  | - |  |  |  | - |  |  |  | - |  |  |  | 50,475 |
Total amount recognized in other comprehensive loss |  |  | 35,427 |  |  |  | 3,525 |  |  |  | 42,536 |  |  |  | (30,593 | )
Net periodic benefit cost |  |  | 6,625 |  |  |  | 10,363 |  |  |  | (10,355 | ) |  |  | (40,575 | )
Total recognized in net periodic benefit cost and other comprehensive loss |  | $ | 42,052 |  |  | $ | 13,888 |  |  | $ | 32,181 |  |  | $ | (71,168 | )
Amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost during next fiscal year |
Amounts in accumulated other comprehensive income expected to be recognized as components of net periodic benefit cost during 2012: |
|  | Pension |  |  | OPEB |
Amortization of net loss |  | $ | 3,521 |  |  | $ | 6,426 |
Amortization of prior service benefit (cost) |  |  | 137 |  |  |  | (4,250 | )
Weighted average assumptions used to determine benefit obligations | Weighted average assumptions were used to determine benefit obligations at December 31:
| Pension | OPEB
| 2011 | 2010 | 2011 | 2010
Discount rate | 4.25% | 5.38% | 4.25% | 5.26%
Rate of compensation increase (1) | 3%/4%/4% | 3%/3%/4% | 3%/4%/4% | 3%/3%/4%
Measurement date | 12/31/2011 | 12/31/2010 | 12/31/2011 | 12/31/2010
(1) | Rate of compensation increase is for year 1/year 2/year 3 and thereafter.
Weighted average assumptions used in calculating net periodic benefit cost [Abstract] | Weighted average assumptions were used to determine net periodic benefit cost for the years ended December 31:
|  | Pension |  |  | OPEB |
|  | 2011 |  |  | 2010 |  |  | 2009 |  |  | 2011 |  |  | 2010 |  |  | 2009 |
Measurement date |  | 12/31/2010 |  |  | 12/31/2009 |  |  | 12/31/2008 |  |  | 12/31/2010 |  |  | 12/31/2009 |  |  | 12/31/2008 |
Fiscal year end |  | 12/31/2011 |  |  | 12/31/2010 |  |  | 12/31/2009 |  |  | 12/31/2011 |  |  | 12/31/2010 |  |  | 12/31/2009 |
Discount rate |  |  | 5.49 | % |  |  | 5.75 | % |  |  | 6.54 | % |  |  | 5.23 | % |  |  | 5.89 | % |  |  | 6.31 | %
Rate of compensation increase |  | 3%/3%/4% |  |  | 2%/3%/4% |  |  |  | 4.00 | % |  | 3%/3%/4% |  |  | 2%/3%/4% |  |  |  | 4.00 | %
Expected return on plan assets |  |  | 8.00 | % |  |  | 8.00 | % |  |  | 8.00 | % |  |  | - |  |  |  | - |  |  |  | - |
Effect of one-percentage point change in assumed health care cost trend rates | A one-percentage-point change in the assumed health care cost trend rates would have had the following effects in 2011:
|  | 1% Increase |  |  | 1% Decrease |
Effect on total of service and interest cost |  | $ | 1,198 |  |  | $ | (977 | )
Effect on accumulated postretirement benefit obligation |  |  | 21,099 |  |  |  | (17,296 | )
Company matching contribution to defined contribution (401(k)) plans | Employees are considered fully vested immediately upon participation in the plan.
|  | 2011 |  |  | 2010 |  |  | 2009 |
Company matching contribution to defined contribution (401(k)) plans |  | $ | 640 |  |  | $ | - |  |  | $ | - |
Pension plan long term strategic asset allocation policy | The Plans' long-term strategic asset allocation policy targets are as follows:
|  | Pension Plan Asset Allocation |
|  | Policy Target |  |  | December 31, 2011 |  |  | December 31, 2010 |
Equities: |  |  |  |  |  |  |  |  |
U.S. equities |  |  | 50 | % |  |  | 51 | % |  |  | 50 | %
International equities |  |  | 15 | % |  |  | 14 | % |  |  | 15 | %
Fixed income |  |  | 35 | % |  |  | 35 | % |  |  | 35 | %
|  |  |  |  |  |  | 100 | % |  |  | 100 | %
Fair Value of Pension Plans' assets by category under fair value hierarchy |
Fair Value of Pension Plans' assets by category under the fair value hierarchy:
As of December 31, 2011 |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Equities: |  |  |  |  |  |  |  |  |  |  |  |
U.S. equities |  | $ | - |  |  | $ | 43,058 |  |  | $ | - |  |  | $ | 43,058 |
International equities |  |  | - |  |  |  | 12,243 |  |  |  | - |  |  |  | 12,243 |
Fixed income |  |  | - |  |  |  | 29,666 |  |  |  | - |  |  |  | 29,666 |
Total |  | $ | - |  |  | $ | 84,967 |  |  | $ | - |  |  | $ | 84,967 |
As of December 31, 2010 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
U.S. equities |  | $ | - |  |  | $ | 36,848 |  |  | $ | - |  |  | $ | 36,848 |
International equities |  |  | - |  |  |  | 11,095 |  |  |  | - |  |  |  | 11,095 |
Fixed income |  |  | - |  |  |  | 25,935 |  |  |  | - |  |  |  | 25,935 |
Total |  | $ | - |  |  | $ | 73,878 |  |  | $ | - |  |  | $ | 73,878 |
Estimated future employer contributions in next fiscal year | We expect to make the following contributions for 2012:
|  | 2012 |
Expected pension plan contributions |  | $ | 8,699 |
Expected OPEB benefits payments |  |  | 6,211 |
Estimated future benefit payments | Estimated Future Benefit Payments The following table provides the estimated future benefit payments for the pension and other postretirement benefit plans.
|  | Pension Benefits |  |  | OPEB Benefits |
2012 |  | $ | 7,682 |  |  | $ | 6,211 |
2013 |  |  | 7,737 |  |  |  | 5,402 |
2014 |  |  | 8,212 |  |  |  | 5,980 |
2015 |  |  | 8,373 |  |  |  | 6,510 |
2016 |  |  | 8,464 |  |  |  | 6,832 |
2017– 2021 |  |  | 49,922 |  |  |  | 39,042 |
Outline of Century's participation in multi-employer pension plan | Century's participation in the plan for the year ended December 31, 2011, is outlined in the table below.
Fund | Steelworkers Pension Trust
EIN / PN | 23-6648508/499
Pension Protection Act Zone Status 2011 (1) | Green
Pension Protection Act Zone Status 2010 (1) | Yellow
Subject to Financial Improvement/Rehabilitation Plan | No
Contributions of Century Aluminum 2011 (2)(3) | $2,117
Contributions of Century Aluminum 2010 (3) | $1,306
Contributions of Century Aluminum 2009 (3) | $1,352
Withdrawal from Plan Probable | No
Surcharge Imposed | No
Expiration Date of Collective Bargaining Agreement | April 1, 2015
(1) | The most recent Pension Protection Act zone status available in 2011 and 2010 is for the plans' year-end December 31, 2010 and December 31, 2009, respectively. The zone status is based on information that Century received from the plan as well as publicly available information per the Department of Labor and is certified by the plan's actuary. Among other factors, plans in the red zone are generally less than 65 percent funded, plans in the yellow zone are less than 80 percent funded, and plans in the green zone are at least 80 percent funded.
(2) | The number of union-represented employees at Hawesville increased approximately 10% due to the restart of curtailed operations.
(3) | Our contributions to the Steelworkers Pension Trust are not 5% or more of the total contributions to the plan.

X
- Definition Tabular disclosure of components of net periodic benefit cost and other amounts recognized in other comprehensive income. + References No definition available. + Details
Name: | cenx_ComponentsOfNetPeriodicBenefitCostAndOtherAmountsRecognizedInOtherComprehensiveIncomeTableTextBlock
Namespace Prefix: | cenx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of estimated future employer contributions to defined benefit plans in next fiscal year. + References No definition available. + Details
Name: | cenx_ScheduleOfEstimatedFutureEmployerContributionsInNextFiscalYearTableTextBlock
Namespace Prefix: | cenx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the fair value of pension plans' assets by asset category under the fair value hierarchy. + References No definition available. + Details
Name: | cenx_ScheduleOfFairValueOfPensionPlanAssetsByAssetCategoryUnderFairValueHierarchyTableTextBlock
Namespace Prefix: | cenx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the Company's matching contribution to defined contribution (401(k)) plans. + References No definition available. + Details
Name: | cenx_ScheduleOfMatchingContributionToDefinedContributionPlansTableTextBlock
Namespace Prefix: | cenx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the Company's participation in the multi-employer pension plan. + References No definition available. + Details
Name: | cenx_ScheduleOfMultiEmployerPensionPlanTableTextBlock
Namespace Prefix: | cenx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the assumptions used to determine net periodic benefit cost. + References No definition available. + Details
Name: | cenx_WeightedAverageAssumptionsUsedInCalculatingNetPeriodicBenefitCostTableTextBlock
Namespace Prefix: | cenx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the assumptions used to determine pension benefit obligation. + References No definition available. + Details
Name: | cenx_WeightedAverageAssumptionsUsedToDetermineBenefitObligationsTableTextBlock
Namespace Prefix: | cenx_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_CompensationAndRetirementDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefit obligations including accumulated benefit obligation and projected benefit obligation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (e) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfAccumulatedAndProjectedBenefitObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the major categories of plan assets of pension plans and/or other employee benefit plans. This information may include, but is not limited to, the target allocation of plan assets, the fair value of each major category of plan assets, and the level within the fair value hierarchy in which the fair value measurements fall. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (d)(5) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfAllocationOfPlanAssetsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Tabular disclosure of the amounts that are recognized in the balance sheet (or statement of financial position) for pension plans and/or other employee benefit plans, showing separately the assets and current and noncurrent liabilities (if applicable) recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Subparagraph (c) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfAmountsRecognizedInBalanceSheetTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
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

X
- Definition Tabular disclosure of the change in the benefit obligation of pension plans and/or other employee benefit plans from the beginning to the end of the period, showing separately, if applicable, the effects of the following: service cost, interest cost, contributions by plan participants, actuarial gains and losses, foreign currency exchange rate changes, benefits paid, plan amendments, business combinations, divestitures, curtailments, settlements, and special and contractual termination benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (a) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfChangesInProjectedBenefitObligationsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the effect of a one-percentage-point increase and the effect of a one-percentage-point decrease in the assumed health care cost trend rates on the aggregate of the service and interest cost components of net periodic postretirement health care benefit costs and the accumulated postretirement benefit obligation for health care benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 -Subparagraph (m) + Details
Name: | us-gaap_ScheduleOfEffectOfOnePercentagePointChangeInAssumedHealthCareCostTrendRatesTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of benefits expected to be paid by pension plans and/or other employee benefit plans in each of the next five fiscal years and in the aggregate for the five fiscal years thereafter. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Topic 715 -SubTopic 20 -Publisher FASB -Number -Article -Subparagraph (f) -Name Accounting Standards Codification -Paragraph 1 -Section 50 -URI http://asc.fasb.org/extlink&oid=6962843&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfExpectedBenefitPaymentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration