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BENEFIT PLANS: | 3 Months Ended
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Mar. 31, 2012
BENEFIT PLANS: |
BENEFIT PLANS: |
NOTE 9 — BENEFIT PLANS: SCC Defined Benefit Pension Plans The components of the net periodic benefit costs for the three months ended March 31, 2012 and 2011 are as follows (in millions):
|  | 2012 |  | 2011 |
Interest cost |  | $ | 0.1 |  | $ | 0.1 |
Expected return on plan assets |  | (0.2 | ) | (0.2 | )
Amortization of net loss (gain) |  | (* | ) | (* | )
Net periodic benefit costs |  | $ | (* | ) | $ | (* | )
(*) amount is lower than $0.1 million SCC Post-retirement Health Care Plan The components of the net periodic benefit costs for the post-retirement health care plan for the three months ended March 31, 2012 and 2011 are individually, and in total, less than $0.1 million. Minera Mexico Pension Plans The components of the net periodic benefit costs for the three months ended March 31, 2012 and 2011 are as follows (in millions):
|  | 2012 |  | 2011 |
Interest cost |  | $ | 0.2 |  | $ | 0.2 |
Service cost |  | 0.3 |  | 0.3 |
Expected return on plan assets |  | (0.7 | ) | (0.8 | )
Amortization of transition assets, net |  | (* | ) | (* | )
Amortization of net actuarial loss |  | (0.2 | ) | (0.4 | )
Amortization of prior services cost |  | (* | ) | (* | )
Net periodic benefit cost |  | $ | (0.4 | ) | $ | (0.7 | )
(*) amount is lower than $0.1 million Minera Mexico Post-retirement Health Care Plan The components of the net periodic benefit cost for the three months ended March 31, 2012 and 2011 are as follows (in millions):
|  | 2012 |  | 2011 |
Interest cost |  | $ | 0.4 |  | $ | 0.9 |
Service cost |  | — |  | (* | )
Amortization of net loss (gain) |  | (0.1 | ) | (* | )
Amortization of transition obligation |  | — |  | 0.4 |
Net periodic benefit cost |  | $ | 0.3 |  | $ | 1.3 |
(*) amount is lower than $0.1 million

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- Definition The entire disclosure for pension and other postretirement benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -URI http://asc.fasb.org/topic&trid=2235017 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 87 -Paragraph 264 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 158 -Paragraph 7, 21, 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph h -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 30 -Paragraph 26 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 132R -Paragraph 5 -Subparagraph a -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 03-2 -Paragraph 8 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. 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