Multiemployer Pension Plans (Details) (USD $)	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Multiemployer Pension Plan Disclosure
Percentage of employees participating in multiemployer pension plans to total employees	55.00%
Contributions of the Company	$ 3,800,000		$ 3,900,000		$ 3,600,000
Company's contributions to the multiemployer plans is less than			5.00%
USW Plan
Multiemployer Pension Plan Disclosure
Employer Identification Number	236648508
Pension Protection Act Zone Status			Green	[1]	Green	[1]
FIP/RP Status Pending/Implemented in 2013	No	[2]
Contributions of the Company	2,900,000	[3]	3,000,000	[3]	2,600,000	[3]
Surcharge Imposed in 2013	No
Expiration Date of Collective-Bargaining Agreement, First	Mar. 31, 2014
Expiration Date of Collective-Bargaining Agreement, Last	Nov. 30, 2017
Number of collective-bargaining agreements	3
USW Plan | Newark, Ohio and Spokane (Trentwood), Washington Facilities
Multiemployer Pension Plan Disclosure
Percentage of employees covered by bargaining agreement	89.00%
USW Plan | Newark, Ohio and Spokane (Trentwood), Washington Facilities | Starting July 2010 Until July 2015
Multiemployer Pension Plan Disclosure
Monthly contributions per hour worked by each bargaining unit employee	1.25
USW Plan | Newark, Ohio and Spokane (Trentwood), Washington Facilities | Starting July 2015
Multiemployer Pension Plan Disclosure
Monthly contributions per hour worked by each bargaining unit employee	1.50
USW Plan | Richmond (Bellwood), Virginia Facility
Multiemployer Pension Plan Disclosure
Percentage of employees covered by bargaining agreement	7.00%
USW Plan | Florence, Alabama Facility
Multiemployer Pension Plan Disclosure
Percentage of employees covered by bargaining agreement	4.00%
Other Funds
Multiemployer Pension Plan Disclosure
Contributions of the Company	900,000	[4]	900,000	[4]	1,000,000	[4]
Multiemployer Pension Plans | Minimum
Multiemployer Pension Plan Disclosure
Estimated annual contribution to pension and other postretirement benefit plans	3,000,000
Multiemployer Pension Plans | Maximum
Multiemployer Pension Plan Disclosure
Estimated annual contribution to pension and other postretirement benefit plans	$ 5,000,000

[1] The most recent Pension Protection Act zone status available in 2013 and 2012 for the Steelworkers Pension Trust is for the plan's year-end at December 31, 2012 and December 31, 2011, respectively. The zone status is based on information that the Company received from the plan and is certified by the plan's actuary. Among other factors, plans in the green zone are at least 80 percent funded.

[2] The “FIP/RP Status Pending/Implemented” column indicates if a Financial Improvement Plan (FIP) or a Rehabilitation Plan (RP) is either pending or has been implemented for the plan under the Pension Protection Act.

[3] The Company is party to three USW collective-bargaining agreements that require contributions to the Steelworkers Pension Trust. Current USW collective bargaining agreements covering employees at the Newark, Ohio and Spokane (Trentwood), Washington facilities covers 89% of the Company's USW-represented employees and expires in September 2015. The Company's monthly contributions per hour worked by each bargaining unit employee at the Newark, Ohio and Spokane (Trentwood), Washington facilities are (in whole dollars) $1.25 and will increase to (in whole dollars) $1.50 in July 2015. The union contracts covering employees at the Richmond (Bellwood), Virginia facility and Florence, Alabama facility cover 7% and 4% of the Company's USW-represented employees, respectively, and expire in November 2017 and March 2014, respectively.

[4] Other Funds consists of plans that are not individually significant.