Environmental and Legal Contingencies (Tables)

3 Months Ended

Mar. 31, 2013

Commitments and Contingencies Disclosure [Abstract]

Schedule of accrual of liabilities related to environmental loss contingencies

Liabilities recorded on the Company’s Consolidated Balance Sheets for such estimated probable costs relating to environmental matters are presented below:

	March 31, 2013		December 31, 2012
Accrued liabilities	$	19.8	$	19.6
Other non-current liabilities	26.8		27.4

Schedule of information on pending asbestos cases

Information on asbestos cases is presented below:

	Asbestos Cases Pending at
	March 31, 2013
Cases with specific dollar claims for damages:
Claims up to $0.2		112
Claims above $0.2 to $5.0		6
Claims above $5.0 to $15.0		2
Claims above $15.0 to $20.0		2
Total claims with specific dollar claims for damages (a)		122
Cases without a specific dollar claim for damages		302
Total asbestos cases pending		424

(a) Involve a total of 2,283 plaintiffs and 17,025 defendants

Schedule of number of new asbestos claims filed, number of pending asbestos claims disposed, and amount paid in settlements

Set forth below is a chart showing the number of new claims filed (accounted for as described above), the number of pending claims disposed of (i.e., settled or otherwise dismissed), and the approximate net amount of dollars paid on behalf of AK Steel in settlement of asbestos-related claims.

	Three Months Ended March 31,
	2013		2012
New Claims Filed	11		14
Pending Claims Disposed Of	20		7
Total Amount Paid in Settlements	$	0.7	$	0.3