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Pension and Other Postretirement Benefits (Tables) | 12 Months Ended
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Dec. 31, 2012
Schedule of obligations and Funded Status | Obligations and Funded Status
|  | Pension benefits |  |  | Other postretirement benefits |
December 31, |  | 2012 |  |  | 2011 |  |  | 2012 |  |  | 2011 |
Change in benefit obligation |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation at beginning of year |  | $ | 13,526 |  |  | $ | 12,343 |  |  | $ | 2,844 |  |  | $ | 2,902 |
Service cost |  |  | 203 |  |  |  | 183 |  |  |  | 14 |  |  |  | 17 |
Interest cost |  |  | 647 |  |  |  | 687 |  |  |  | 132 |  |  |  | 159 |
Amendments |  |  | 6 |  |  |  | 40 |  |  |  | - |  |  |  | (1 | )
Actuarial losses |  |  | 1,120 |  |  |  | 1,163 |  |  |  | 107 |  |  |  | 17 |
Settlements |  |  | - |  |  |  | (32 | ) |  |  | - |  |  |  | - |
Curtailments |  |  | - |  |  |  | (7 | ) |  |  | - |  |  |  | - |
Benefits paid, net of participants’ contributions |  |  | (833 | ) |  |  | (813 | ) |  |  | (256 | ) |  |  | (275 | )
Medicare Part D subsidy receipts |  |  | - |  |  |  | - |  |  |  | 21 |  |  |  | 25 |
Foreign currency translation impact |  |  | 82 |  |  |  | (38 | ) |  |  | 1 |  |  |  | - |
Benefit obligation at end of year* |  | $ | 14,751 |  |  | $ | 13,526 |  |  | $ | 2,863 |  |  | $ | 2,844 |
Change in plan assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  | $ | 10,311 |  |  | $ | 9,451 |  |  | $ | 8 |  |  | $ | 58 |
Actual return on plan assets |  |  | 925 |  |  |  | 783 |  |  |  | - |  |  |  | 2 |
Employer contributions |  |  | 571 |  |  |  | 945 |  |  |  | - |  |  |  | - |
Participants’ contributions |  |  | 32 |  |  |  | 35 |  |  |  | - |  |  |  | - |
Benefits paid |  |  | (822 | ) |  |  | (805 | ) |  |  | (8 | ) |  |  | (52 | )
Administrative expenses |  |  | (42 | ) |  |  | (38 | ) |  |  | - |  |  |  | - |
Settlements |  |  | - |  |  |  | (34 | ) |  |  | - |  |  |  | - |
Foreign currency translation impact |  |  | 68 |  |  |  | (26 | ) |  |  | - |  |  |  | - |
Fair value of plan assets at end of year* |  | $ | 11,043 |  |  | $ | 10,311 |  |  | $ | - |  |  | $ | 8 |
Funded status* |  | $ | (3,708 | ) |  | $ | (3,215 | ) |  | $ | (2,863 | ) |  | $ | (2,836 | )
Less: Amounts attributed to joint venture partners |  |  | (40 | ) |  |  | (34 | ) |  |  | (4 | ) |  |  | (5 | )
Net funded status |  | $ | (3,668 | ) |  | $ | (3,181 | ) |  | $ | (2,859 | ) |  | $ | (2,831 | )
Amounts recognized in the Consolidated Balance Sheet consist of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Noncurrent assets |  | $ | 86 |  |  | $ | 109 |  |  | $ | - |  |  | $ | - |
Current liabilities |  |  | (32 | ) |  |  | (29 | ) |  |  | (256 | ) |  |  | (248 | )
Noncurrent liabilities |  |  | (3,722 | ) |  |  | (3,261 | ) |  |  | (2,603 | ) |  |  | (2,583 | )
Net amount recognized |  | $ | (3,668 | ) |  | $ | (3,181 | ) |  | $ | (2,859 | ) |  | $ | (2,831 | )
Amounts recognized in Accumulated Other Comprehensive Loss consist of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net actuarial loss |  | $ | 5,880 |  |  | $ | 5,191 |  |  | $ | 593 |  |  | $ | 511 |
Prior service cost (benefit) |  |  | 119 |  |  |  | 129 |  |  |  | (76 | ) |  |  | (92 | )
Total, before tax effect |  |  | 5,999 |  |  |  | 5,320 |  |  |  | 517 |  |  |  | 419 |
Less: Amounts attributed to joint venture partners |  |  | 54 |  |  |  | 46 |  |  |  | (1 | ) |  |  | (1 | )
Net amount recognized, before tax effect |  | $ | 5,945 |  |  | $ | 5,274 |  |  | $ | 518 |  |  | $ | 420 |
Other Changes in Plan Assets and Benefit Obligations Recognized in Other Comprehensive Loss consist of: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net actuarial loss |  | $ | 1,073 |  |  | $ | 1,216 |  |  | $ | 107 |  |  | $ | 17 |
Amortization of accumulated net actuarial loss |  |  | (384 | ) |  |  | (246 | ) |  |  | (25 | ) |  |  | (26 | )
Prior service cost (benefit) |  |  | 9 |  |  |  | 42 |  |  |  | - |  |  |  | (1 | )
Amortization of prior service (cost) benefit |  |  | (19 | ) |  |  | (19 | ) |  |  | 16 |  |  |  | 17 |
Total, before tax effect |  |  | 679 |  |  |  | 993 |  |  |  | 98 |  |  |  | 7 |
Less: Amounts attributed to joint venture partners |  |  | 8 |  |  |  | 10 |  |  |  | - |  |  |  | (1 | )
Net amount recognized, before tax effect |  | $ | 671 |  |  | $ | 983 |  |  | $ | 98 |  |  | $ | 8 |
* | At December 31, 2012, the benefit obligation, fair value of plan assets, and funded status for U.S. pension plans were $11,521, $8,437, and $(3,084), respectively. At December 31, 2011, the benefit obligation, fair value of plan assets, and funded status for U.S. pension plans were $10,702, $7,988, and $(2,714), respectively.
Schedule of Pension Plan Benefit Obligations | Pension Plan Benefit Obligations
|  | Pension benefits |
|  | 2012 |  |  | 2011 |
The projected benefit obligation and accumulated benefit obligation for all defined benefit pension plans was as follows: |  |  |  |  |  |  |  |
Projected benefit obligation |  | $ | 14,751 |  |  | $ | 13,526 |
Accumulated benefit obligation |  |  | 14,186 |  |  |  | 13,025 |
The aggregate projected benefit obligation and fair value of plan assets for pension plans with projected benefit obligations in excess of plan assets was as follows: |  |  |  |  |  |  |  |
Projected benefit obligation |  |  | 13,973 |  |  |  | 12,828 |
Fair value of plan assets |  |  | 10,142 |  |  |  | 9,470 |
The aggregate accumulated benefit obligation and fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets was as follows: |  |  |  |  |  |  |  |
Accumulated benefit obligation |  |  | 13,421 |  |  |  | 12,184 |
Fair value of plan assets |  |  | 10,123 |  |  |  | 9,281 |
Components of Net Periodic Benefit Cost | Components of Net Periodic Benefit Cost
|  | Pension benefits(1) |  |  | Other postretirement benefits(2) |
|  | 2012 |  |  | 2011 |  |  | 2010 |  |  | 2012 |  |  | 2011 |  |  | 2010 |
Service cost |  | $ | 186 |  |  | $ | 165 |  |  | $ | 148 |  |  | $ | 14 |  |  | $ | 17 |  |  | $ | 20 |
Interest cost |  |  | 639 |  |  |  | 678 |  |  |  | 682 |  |  |  | 131 |  |  |  | 158 |  |  |  | 174 |
Expected return on plan assets |  |  | (808 | ) |  |  | (806 | ) |  |  | (787 | ) |  |  | - |  |  |  | (2 | ) |  |  | (7 | )
Recognized net actuarial loss |  |  | 384 |  |  |  | 247 |  |  |  | 181 |  |  |  | 25 |  |  |  | 26 |  |  |  | 33 |
Amortization of prior service cost (benefit) |  |  | 19 |  |  |  | 19 |  |  |  | 17 |  |  |  | (16 | ) |  |  | (17 | ) |  |  | (15 | )
Settlements(3) |  |  | - |  |  |  | 2 |  |  |  | 2 |  |  |  | - |  |  |  | - |  |  |  | (3 | )
Curtailments(4) |  |  | - |  |  |  | (9 | ) |  |  | (10 | ) |  |  | - |  |  |  | - |  |  |  | - |
Net periodic benefit cost(5) |  | $ | 420 |  |  | $ | 296 |  |  | $ | 233 |  |  | $ | 154 |  |  | $ | 182 |  |  | $ | 202 |
(1) | In 2012, 2011, and 2010, net periodic benefit cost for U.S pension plans was $288, $190, and $155, respectively.
(2) | In 2012, 2011, and 2010, net periodic benefit cost for other postretirement benefits reflects a reduction of $64, $43, and $39, respectively, related to the recognition of the federal subsidy awarded under Medicare Part D.
(3) | In all periods presented, settlements were due to the payment of significant lump sum benefits and/or purchases of annuity contracts.
(4) | In each period presented, curtailments were due to elimination of benefits or workforce reductions (see Note D).
(5) | Amounts attributed to joint venture partners are not included.
Schedule of Amounts Expected to be Recognized in Net Periodic Benefit Cost | Amounts Expected to be Recognized in Net Periodic Benefit Cost
|  | Pension benefits |  |  | Other postretirement benefits |
|  | 2013 |  |  | 2013 |
Net actuarial loss recognition |  | $ | 494 |  |  | $ | 36 |
Prior service cost (benefit) recognition |  |  | 19 |  |  |  | (18 | )
Schedule of Assumed Health Care Cost Trend Rates | Assumed health care cost trend rates for U.S. other postretirement benefit plans were as follows (assumptions for non-U.S plans did not differ materially):
|  | 2012 |  |  | 2011 |  |  | 2010 |
Health care cost trend rate assumed for next year |  |  | 6.0 | % |  |  | 6.5 | % |  |  | 6.5 | %
Rate to which the cost trend rate gradually declines |  |  | 4.5 | % |  |  | 5.0 | % |  |  | 5.0 | %
Year that the rate reaches the rate at which it is assumed to remain |  |  | 2017 |  |  |  | 2016 |  |  |  | 2015 |
Schedule of One-Percentage Point Change in Assumed Rates of Health Care Cost Trend Rates | A one-percentage point change in these assumed rates would have the following effects:
|  | 1% increase |  |  | 1% decrease |
Effect on other postretirement benefit obligations |  | $ | 124 |  |  | $ | (114 | )
Effect on total of service and interest cost components |  |  | 5 |  |  |  | (5 | )
Schedule of Pension and Postretirement Plans Investment Policy and Weighted Average Asset Allocations | Alcoa’s pension and other postretirement plans’ investment policy and weighted average asset allocations at December 31, 2012 and 2011, by asset class, were as follows:
|  |  |  |  | Plan assets at December 31, |
Asset class |  | Policy range |  |  | 2012 |  |  | 2011 |
Equities |  |  | 20–55 | % |  |  | 33 | % |  |  | 34 | %
Fixed income |  |  | 25–55 | % |  |  | 50 |  |  |  | 50 |
Other investments |  |  | 15–35 | % |  |  | 17 |  |  |  | 16 |
Total |  |  |  |  |  |  | 100 | % |  |  | 100 | %
Schedule of Fair Value of Pension and Postretirement Plans' Assets | The following table presents the fair value of pension and other postretirement plans’ assets classified under the appropriate level of the fair value hierarchy:
December 31, 2012 |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Equities: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities |  | $ | 1,016 |  |  | $ | 1,196 |  |  | $ | 117 |  |  | $ | 2,329 |
Short and long equity hedge funds |  |  | - |  |  |  | - |  |  |  | 756 |  |  |  | 756 |
Private equity |  |  | - |  |  |  | - |  |  |  | 550 |  |  |  | 550 |
|  | $ | 1,016 |  |  | $ | 1,196 |  |  | $ | 1,423 |  |  | $ | 3,635 |
Fixed income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intermediate and long duration government/credit |  | $ | 1,169 |  |  | $ | 3,689 |  |  | $ | 215 |  |  | $ | 5,073 |
Other |  |  | - |  |  |  | 507 |  |  |  | - |  |  |  | 507 |
|  | $ | 1,169 |  |  | $ | 4,196 |  |  | $ | 215 |  |  | $ | 5,580 |
Other investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate |  | $ | 113 |  |  | $ | 83 |  |  | $ | 377 |  |  | $ | 573 |
Macro hedge funds |  |  | - |  |  |  | - |  |  |  | 796 |  |  |  | 796 |
Other |  |  | 212 |  |  |  | - |  |  |  | 247 |  |  |  | 459 |
|  | $ | 325 |  |  | $ | 83 |  |  | $ | 1,420 |  |  | $ | 1,828 |
Total |  | $ | 2,510 |  |  | $ | 5,475 |  |  | $ | 3,058 |  |  | $ | 11,043 |
December 31, 2011 |  | Level 1 |  |  | Level 2 |  |  | Level 3 |  |  | Total |
Equities |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity securities* |  | $ | 904 |  |  | $ | 1,203 |  |  | $ | 110 |  |  | $ | 2,217 |
Short and long equity hedge funds |  |  | - |  |  |  | - |  |  |  | 731 |  |  |  | 731 |
Private equity |  |  | - |  |  |  | - |  |  |  | 542 |  |  |  | 542 |
|  | $ | 904 |  |  | $ | 1,203 |  |  | $ | 1,383 |  |  | $ | 3,490 |
Fixed income: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Intermediate and long duration government/credit |  | $ | 1,223 |  |  | $ | 3,540 |  |  | $ | 211 |  |  | $ | 4,974 |
Other |  |  | - |  |  |  | 340 |  |  |  | - |  |  |  | 340 |
|  | $ | 1,223 |  |  | $ | 3,880 |  |  | $ | 211 |  |  | $ | 5,314 |
Other investments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Real estate |  | $ | 97 |  |  | $ | 74 |  |  | $ | 375 |  |  | $ | 546 |
Macro hedge funds |  |  | - |  |  |  | - |  |  |  | 668 |  |  |  | 668 |
Other |  |  | 198 |  |  |  | - |  |  |  | 123 |  |  |  | 321 |
|  | $ | 295 |  |  | $ | 74 |  |  | $ | 1,166 |  |  | $ | 1,535 |
Total** |  | $ | 2,422 |  |  | $ | 5,157 |  |  | $ | 2,760 |  |  | $ | 10,339 |
* | At December 31, 2011, Level 1 equity securities include $36 of Alcoa common stock related to the January 2011 plan contribution (see Funding and Cash Flows section below).
** | As of December 31, 2011, the total fair value of pension and other postretirement plans’ assets excludes a net payable of $20, which represents securities purchased not yet settled less interest and dividends earned on various investments.
Schedule of Reconciliation of Activity for Investments | The following table presents a reconciliation of activity for such investments:
|  | 2012 |  |  | 2011 |
Balance at beginning of year |  | $ | 2,760 |  |  | $ | 1,499 |
Realized gains |  |  | 52 |  |  |  | 67 |
Unrealized gains |  |  | 142 |  |  |  | 100 |
Purchases |  |  | 634 |  |  |  | 1,221 |
Sales |  |  | (538 | ) |  |  | (124 | )
Issuances |  |  | - |  |  |  | - |
Settlements |  |  | - |  |  |  | - |
Foreign currency translation impact |  |  | 8 |  |  |  | (3 | )
Transfers in and (or) out of Level 3* |  |  | - |  |  |  | - |
Balance at end of year |  | $ | 3,058 |  |  | $ | 2,760 |
* | In 2012 and 2011, there were no transfers of financial instruments into or out of Level 3
Schedule of Benefit Payments Expected to be Paid and Expected Medicare Part D Subsidy Receipts | Benefit payments expected to be paid to pension and other postretirement benefit plans’ participants and expected Medicare Part D subsidy receipts are as follows:
Year ended December 31, |  | Pension benefits |  |  |  |  | Gross Other post- retirement benefits |  |  | Medicare Part D subsidy receipts |  |  | Net Other post- retirement benefits |
2013 |  | $ | 880 |  |  |  |  | $ | 285 |  |  | $ | 30 |  |  | $ | 255 |
2014 |  |  | 870 |  |  |  |  |  | 280 |  |  |  | 30 |  |  |  | 250 |
2015 |  |  | 880 |  |  |  |  |  | 280 |  |  |  | 30 |  |  |  | 250 |
2016 |  |  | 890 |  |  |  |  |  | 275 |  |  |  | 30 |  |  |  | 245 |
2017 |  |  | 910 |  |  |  |  |  | 270 |  |  |  | 35 |  |  |  | 235 |
2018 through 2022 |  |  | 4,620 |  |  |  |  |  | 1,200 |  |  |  | 170 |  |  |  | 1,030 |
|  | $ | 9,050 |  |  |  |  | $ | 2,590 |  |  | $ | 325 |  |  | $ | 2,265 |
Benefit Obligation [Member] |
Schedule of Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost | Weighted average assumptions used to determine benefit obligations for U.S. pension and other postretirement benefit plans were as follows (assumptions for non-U.S plans did not differ materially):
December 31, |  | 2012 |  |  | 2011 |
Discount rate |  |  | 4.15 | % |  |  | 4.90 | %
Rate of compensation increase |  |  | 3.5 |  |  |  | 3.5 |
Net Periodic Benefit Cost [Member] |
Schedule of Weighted Average Assumptions Used to Determine Benefit Obligations and Net Periodic Benefit Cost | Weighted average assumptions used to determine net periodic benefit cost for U.S. pension and other postretirement benefit plans were as follows (assumptions for non-U.S plans did not differ materially):
|  | 2012 |  |  | 2011 |  |  | 2010 |
Discount rate* |  |  | 4.90 | % |  |  | 5.75 | % |  |  | 6.15 | %
Expected long-term rate of return on plan assets |  |  | 8.50 |  |  |  | 8.50 |  |  |  | 8.75 |
Rate of compensation increase |  |  | 3.50 |  |  |  | 3.50 |  |  |  | 3.50 |
* | In all periods presented, the respective discount rates were used to determine net periodic benefit cost for most U.S. pension plans for the full annual period. However, the discount rates for a limited number of plans were updated during 2011 and 2010 to reflect the remeasurement of these plans due to new union labor agreements, settlements, and (or) curtailments. The updated discount rates used were not significantly different from the discount rates presented.

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- 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 -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the assumed health care cost trend rates for the next year used to measure the expected cost of benefits covered by the plans, including the ultimate trend rate(s) and when that rate is expected to be achieved. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (l) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the change in defined benefit plan assets within level 3 of the fair value hierarchy. + References No definition available. + Details
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- Definition Tabular disclosure of the amounts related to pension plans and/or other employee benefit plans in accumulated other comprehensive income or loss that have not yet been recognized as components of net periodic benefit cost, such as 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 -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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