Income Taxes

3 Months Ended

Mar. 31, 2012

Income Tax Disclosure [Abstract]

Income Taxes

Income Taxes

The following is a reconciliation of the expected statutory federal income tax provision to the Company’s actual income tax provision:

	Three Months Ended March 31,
	2012			2011
	(Dollars in millions)
Expected income tax provision at federal statutory rate	$	89.7		$	93.6
Excess depletion	(16.5		)	(13.8		)
Foreign earnings provision differential	(16.6		)	(19.3		)
Remeasurement of foreign income tax accounts	8.9			6.4
State income taxes, net of U.S. federal tax benefit	2.4			2.4
General business tax credits	(4.8		)	(3.5		)
Changes in valuation allowance	7.0			1.0
Changes in tax reserves	(3.1		)	2.0
Other, net	7.0			4.0
Total provision	$	74.0		$	72.8