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Restructuring Costs (Details) $ / shares in Units, $ in Millions | 1 Months Ended | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2015 USD ($) | Dec. 31, 2015 USD ($) employee | Dec. 31, 2015 USD ($) $ / shares | Dec. 31, 2014 USD ($) | Dec. 31, 2013 USD ($) employee $ / shares
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring charges |  |  | $ 64.3 | $ 0.0 | $ 67.5
Restructuring costs net of tax |  |  | $ 41.6 |  | $ 41.2
Restructuring costs, per share (in dollars per share) | $ / shares |  |  | $ 0.39 |  | $ 0.39
Asset Impairment Charges |  | $ 54.5 |  |  | $ 55.1
Revision of estimates |  |  | $ (0.2) | (1.0) | 4.2
Severance and termination benefit costs |  |  |  |  | 8.2
Restructuring reserve | $ 8.0 | 8.0 | 8.0 |  | 2.0
Restructuring and other charges |  |  | 89.7 | 0.0 | 67.5
Inventory Valuation Reserve [Member] | Non-PQ grade titanium sponge [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Lower of cost or market charges |  | (25.4) |  |  |
Inventory Valuation Reserve [Member] | Industrial titanium products [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Lower of cost or market charges |  |  | $ (24.5) | $ (23.2) | (20.5)
Facility Idling Costs [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Restructuring costs |  | 3.5 |  |  |
Restructuring costs net of tax |  | 2.2 |  |  |
High Performance Materials & Components and Corporate [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance and termination benefit costs |  | $ 6.3 |  |  |
Number of employees affected by restructuring | employee |  | 100 |  |  |
High Performance Materials & Components [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  |  |  | 8.0
Severance and termination benefit costs |  |  |  |  | $ 1.1
Number of employees affected by restructuring | employee |  |  |  |  | 75
High Performance Materials & Components [Member] | Benefit Termination [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance and termination benefit costs |  |  |  |  | $ 1.1
Midland, Pennsylvania Facility [Member] | Flat Rolled Products [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Asset Impairment Charges | 24.2 |  |  |  |
Grain-Oriented Electrical Steel (GOES) Operations in Western Pennsylvania [Member] | Flat Rolled Products [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Asset Impairment Charges | $ 30.3 |  |  |  |
Albany, Oregon Standard-grade Titanium Sponge Facility [Member] | High Performance Materials & Components [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  |  |  | 38.1
Revision of estimates |  |  |  |  | 3.5
New Castle, Indiana Stainless Finishing Facility [Member] | Flat Rolled Products [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  |  |  | 6.3
Revision of estimates |  |  |  |  | 0.3
Wallingford, Connecticut Stainless Finishing Facility [Member] | Flat Rolled Products [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  |  |  | 2.7
Revision of estimates |  |  |  |  | 0.4
Severance and termination benefit costs |  |  |  |  | $ 1.0
Number of employees affected by restructuring | employee |  |  |  |  | 65
Wallingford, Connecticut Stainless Finishing Facility [Member] | Flat Rolled Products [Member] | Benefit Termination [Member] |  |  |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |  |  |
Severance and termination benefit costs |  |  |  |  | $ 5.0

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