Exhibit 12.1

STATEMENT REGARDING COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

	Six
	Months
	Ended
	June 30,			Year Ended December 31,
(in millions, except ratios)	2010			2009			2008			2007			2006			2005
EARNINGS:
Income before income taxes and earnings of non-controlling interests	$	136.8		$	115.2		$	404.8		$	305.4		$	197.1		$	148.4
Fixed charges		16.7			41.2			52.5			55.2			46.4			43.1
Capitalized interest		(1.3	)		(6.6	)		(8.0	)		(4.1	)		(10.2	)		(4.8	)
Total	$	152.2		$	149.8		$	449.3		$	356.5		$	233.3		$	186.7
RATIO OF EARNINGS TO FIXED CHARGES		9.11			3.64			8.56			6.46			5.03			4.33
FIXED CHARGES:
Interest expense on debt	$	15.7		$	38.8		$	50.2		$	52.5		$	43.8		$	40.7
Amortization of discount on debt		0.4			1.3			0.8			1.1			1.0			1.0
Interest portion of rental expense on operating leases		0.6			1.1			1.5			1.6			1.6			1.4
Total	$	16.7		$	41.2		$	52.5		$	55.2		$	46.4		$	43.1