Exhibit 12.1

Computation of Ratio of Earnings to Fixed Charges
(Dollars in Millions, Except Ratios)

	For the Year Ended December 31,
	2006		2007		2008		2009		2010
Earnings:
Net earnings	$	338.4	$	300.8	$	240.2	$	145.9	$	340.0
Provision for income taxes		120.9		48.7		35.7		41.1		81.5
Amortization of capitalized interest		0.2		0.1		0.1		0.2		0.7
Fixed charges excluding interest capitalized		22.5		23.0		37.9		47.7		50.9
Total		482.0		372.6		313.9		234.9		473.1
Fixed Charges:
Interest expense (gross of interest income)		12.1		13.0		28.9		39.3		41.9
Amortization of deferred financing expense		0.3		0.3		0.7		1.4		2.0
Interest capitalized		1.8		0.2		1.4		3.4		2.1
Interest component of rental expense		10.1		9.7		8.3		7.0		7.0
Total		24.3		23.2		39.3		51.1		53.0
Ratio of Earnings to Fixed Charges		19.8		16.1		8.0		4.6		8.9