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Exhibit 12.1

COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES

			Three months ended March 31,
							Years ended December 31,
(millions except ratios)
			2006		2005		2005		2004		2003		2002		2001
Income before income taxes, equity in net income of associates and minority interest			$	195	$	81	$	421	$	591	$	540	$	420	$	240
Add back fixed charges:
		Total fixed charges		14		12		53		48		74		86		101
Dividends from associates				—		—		5		7		6		3		4
		Income as adjusted	$	209	$	93	$	479	$	646	$	620	$	509	$	345
Fixed Charges
	Interest expense		$	9	$	6	$	30	$	22	$	53	$	65	$	82
	Portion of rents representative of interest factor			5		6		23		26		21		21		19
		Total fixed charges	$	14	$	12	$	53	$	48	$	74	$	86	$	101
Ratio of earnings to fixed charges				14.9		7.8		9.0		13.5		8.4		5.9		3.4

COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND
PREFERRED STOCK DIVIDENDS

			Three months ended March 31,
							Years ended December 31,
(millions except ratios)
			2006		2005		2005		2004		2003		2002		2001
Income before income taxes, equity in net income of associates and minority interest			$	195	$	81	$	421	$	591	$	540	$	420	$	240
Add back fixed charges:
		Total fixed charges		14		12		53		48		74		86		101
Dividends from associates				—		—		5		7		6		3		4
		Income as adjusted	$	209	$	93	$	479	$	646	$	620	$	509	$	345
Fixed Charges and preferred stock dividends
	Interest expense		$	9	$	6	$	30	$	22	$	53	$	65	$	82
	Portion of rents representative of interest factor			5		6		23		26		21		21		19
		Total fixed charges	$	14	$	12	$	53	$	48	$	74	$	86	$	101
	Preferred stock dividends			—		—		—		—		—		—		19
		Total fixed charges and preferred stock dividends	$	14	$	12	$	53	$	48	$	74	$	86	$	120
Ratio of earnings to combined fixed charges and preferred stock dividends				14.9		7.8		9.0		13.5		8.4		5.9		2.9

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Exhibit 12.1
COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES
COMPUTATION OF RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS