| Component: (Network and Table) | |
|---|---|
| Network | 2449402 - Disclosure - Restructuring Charges (Details) (http://www.mt.com/role/RestructuringChargesDetails) |
| Table | Schedule of Restructuring and Related Costs [Table] |
| Reporting Entity [Axis] | 0001037646 (http://www.sec.gov/CIK) |
| Restructuring Cost and Reserve [Axis] | Type of Restructuring [Domain] |
| Restructuring Cost and Reserve | Period [Axis] | ||
|---|---|---|---|
2016-01-01 - 2016-12-31 | 2015-01-01 - 2015-12-31 | 2014-01-01 - 2014-12-31 | |
Restructuring Reserve, Beginning | |||
Restructuring Charges | 6,235,000 | 11,148,000 | 5,915,000 |
Payments for Restructuring | ( | ( | |
Restructuring Reserve, Translation Adjustment | ( | ( | |
Restructuring Reserve, Ending | 12,211,000 | 8,436,000 | |