Exhibit 11

Statements Re: Computation Of Per Share Earnings

	Three months ended June 30,				Six months ended June 30,
(Dollars in millions except per share data)	2007		2006		2007		2006
Numerator:
Net income—basic and diluted	$	351	$	132	$	545	$	684
Denominator:
Weighted-average common shares outstanding		171,712,547		173,275,927		172,178,180		173,724,517
Effect of stock options and nonvested shares		1,711,025		1,746,440		1,693,432		1,890,500
Adjusted weighted-average shares		173,423,572		175,022,367		173,871,612		175,615,017
Earnings per share:
Basic	$	2.04	$	0.77	$	3.16	$	3.94
Diluted		2.02		0.76		3.13		3.90

Anti -Dilutive Securities

Certain option shares were not included in the computation of diluted earnings per share for the six-month period ended June 30, 2007, since inclusion of these option shares would have anti-dilutive effects.

	Three months ended June 30,				Six months ended June 30,
	2007		2006		2007		2006
Number of anti-dilutive nonvested shares		—		—		199,100		—
Number of anti-dilutive option shares		1,889,148		2,800,589		1,889,148		2,800,589
Exercise price range of anti-dilutive option shares	$	44.79-45.26	$	41.62-45.26	$	44.79-45.26	$	41.62-45.26