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Restructuring Programs (Details) (USD $) | 12 Months Ended | 3 Months Ended | 12 Months Ended |  | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2010 Harsco Infrastructure Segment | Dec. 31, 2012 2011/2012 Restructuring Program | Dec. 31, 2011 2011/2012 Restructuring Program | Dec. 31, 2012 2011/2012 Restructuring Program Harsco Infrastructure Segment | Dec. 31, 2011 2011/2012 Restructuring Program Harsco Infrastructure Segment | Dec. 31, 2012 2011/2012 Restructuring Program Harsco Infrastructure Segment Employee termination benefit costs | Dec. 31, 2012 2011/2012 Restructuring Program Harsco Infrastructure Segment Cost to exit activities | Dec. 31, 2012 2011/2012 Restructuring Program Harsco Metals & Minerals Segment | Dec. 31, 2011 2011/2012 Restructuring Program Harsco Metals & Minerals Segment | Dec. 31, 2012 2011/2012 Restructuring Program Harsco Metals & Minerals Segment Employee termination benefit costs | Dec. 31, 2012 2011/2012 Restructuring Program Harsco Metals & Minerals Segment Cost to exit activities | Dec. 31, 2012 2011/2012 Restructuring Program Harsco Rail Segment Employee termination benefit costs | Dec. 31, 2012 2011/2012 Restructuring Program Harsco Corporate Employee termination benefit costs | Dec. 31, 2012 2011/2012 Restructuring Program Minimum | Dec. 31, 2012 Fourth Quarter 2010 Harsco Infrastructure Program | Dec. 31, 2012 Fourth Quarter 2010 Harsco Infrastructure Program Harsco Infrastructure Segment | Dec. 31, 2012 Fourth Quarter 2010 Harsco Infrastructure Program Harsco Infrastructure Segment Employee termination benefit costs | Dec. 31, 2012 Fourth Quarter 2010 Harsco Infrastructure Program Harsco Infrastructure Segment Cost to exit activities | Dec. 31, 2012 Fourth Quarter 2010 Harsco Infrastructure Program Harsco Infrastructure Segment Other | Dec. 31, 2012 Prior restructuring programs Harsco Metals & Minerals Segment | Dec. 31, 2012 Prior restructuring programs Harsco Metals & Minerals Segment Employee termination benefit costs | Dec. 31, 2012 Prior restructuring programs Harsco Metals & Minerals Segment Cost to exit activities
Restructuring Cost and Reserve [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax restructuring charges |  |  |  | $ 84,400,000 |  |  | $ 101,000,000 | $ 88,600,000 | [1] | $ 87,600,000 | [1] |  |  |  |  | $ 5,500,000 | [1] | $ 12,800,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Overall cost savings in 2012 |  |  |  |  | 55,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Overall cost savings expected in 2013 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 63,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring Reserve [Roll Forward] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Accrual Beginning Balance |  |  |  |  | 30,471,000 |  |  | 17,333,000 | [2] |  |  | 14,500,000 |  | 2,833,000 |  | 12,737,000 | [2] |  |  | 12,737,000 |  | 0 |  | 50,000 |  | 351,000 |  |  |  | 12,147,000 |  | 211,000 |  | 11,929,000 |  | 7,000 |  | 2,007,000 |  | 1,280,000 |  | 727,000 |
Additional Expenses Incurred |  |  |  |  | 69,333,000 | [1] |  | 63,422,000 | [1],[2] |  |  | 17,495,000 | [1] | 45,927,000 | [1] | 5,473,000 | [1],[2] |  |  | 4,974,000 | [1] | 499,000 | [1] | 67,000 | [1] | 371,000 | [1] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Adjustments to Previously Recorded Restructuring Charges |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,018,000) | [3] | (208,000) | [3] | (805,000) | [3] | (5,000) | [3] | (1,263,000) | [3] | (1,263,000) | [3] | 0 | [3]
Non-Cash Charges / Adjustments |  |  |  |  | (111,000) |  |  | (111,000) | [2] |  |  | (326,000) |  | 215,000 |  | 0 | [2] |  |  | 0 |  | 0 |  | 0 |  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Cash Payments |  |  |  |  | (77,105,000) |  |  | (65,262,000) | [2] |  |  | (25,265,000) |  | (39,997,000) |  | (11,017,000) | [2] |  |  | (11,017,000) |  | 0 |  | (117,000) |  | (709,000) |  |  |  | (4,178,000) |  | 0 |  | (4,178,000) |  | 0 |  | (167,000) |  | (43,000) |  | (124,000) |
Foreign Currency Translation |  |  |  |  | 417,000 |  |  | 617,000 | [2] |  |  | 595,000 |  | 22,000 |  | (200,000) | [2] |  |  | (200,000) |  | 0 |  | 0 |  | 0 |  |  |  | (160,000) |  | (3,000) |  | (155,000) |  | (2,000) |  | 13,000 |  | 26,000 |  | (13,000) |
Remaining Accrual Ending Balance |  |  |  |  | 23,005,000 |  | 30,471,000 | 15,999,000 | [2] | 17,333,000 | [2] | 6,999,000 |  | 9,000,000 |  | 6,993,000 | [2] | 12,737,000 | [2] | 6,494,000 |  | 499,000 |  | 0 |  | 13,000 |  |  |  | 6,791,000 |  | 0 |  | 6,791,000 |  | 0 |  | 590,000 |  | 0 |  | 590,000 |
Non-cash product rationalization expense | 24,966,000 | 66,063,000 | 34,302,000 |  |  |  |  | 25,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from sales of assets | 49,779,000 | 42,653,000 | 22,663,000 |  |  |  |  | 17,700,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Remaining portion of restructuring accrual related to exit activity costs for lease terminations expected to be paid over the remaining life of the leases |  |  |  |  |  |  |  |  |  |  |  |  |  | 7,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Withdrawal liability to exit certain multi-employer pension plans |  |  | $ 8,300,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 6,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
[1] | Includes principally the recognition of additional expenses due to timing considerations under U.S. GAAP, as well as adjustments to previously recorded restructuring charges resulting from changes in facts and circumstances in the implementation of these activities.
[2] | The table does not include $25.0 million of non-cash product rationalization expense or $17.7 million of proceeds from asset sales under the 2011/2012 Restructuring Program for this Segment as these items did not impact the restructuring accrual during 2012.
[3] | Adjustments to previously recorded restructuring charges resulted from changes in facts and circumstances in the implementation of these activities.

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