Net Income Per Share (Tables)

9 Months Ended

Sep. 30, 2011

Net Income Per Share [Abstract]

Reconciliation Of Earnings Per Share

		Income (Numerator)		Weighted Average Shares (Denominator)		Per Share Amount
		(in millions, except per share data)
Three Months Ended September 30, 2011:
Basic EPS	$		879		638	$	1.38
Effect of Dilutive Securities:
Assumed conversion as of the beginning of the period of preferred shares outstanding during the period:
Common shares assumed issued for 5.75% cumulative convertible preferred stock			21		56
Common shares assumed issued for 5.75% cumulative convertible preferred stock (series A)			16		39
Common shares assumed issued for 5.00% cumulative convertible preferred stock (series 2005B)			3		5
Common shares assumed issued for 4.50% cumulative convertible preferred stock			3		6
Unvested restricted stock			—		8
Outstanding stock options			—		1
Diluted EPS	$		922		753	$	1.23
Three Months Ended September 30, 2010:
Basic EPS	$		515		632	$	0.81
Effect of Dilutive Securities:
Assumed conversion as of the beginning of the period of preferred shares outstanding during the period:
Common shares assumed issued for 5.75% cumulative convertible preferred stock			21		56
Common shares assumed issued for 5.75% cumulative convertible preferred stock (series A)			16		40
Common shares assumed issued for 5.00% cumulative convertible preferred stock (series 2005B)			3		5
Common shares assumed issued for 4.50% cumulative convertible preferred stock			3		6
Unvested restricted stock			—		4
Outstanding stock options			—		1
Diluted EPS	$		558		744	$	0.75
		Income (Numerator)		Weighted Average Shares (Denominator)		Per Share Amount
		(in millions, except per share data)
Nine Months Ended September 30, 2011:
Basic EPS	$		1,141		636	$	1.79
Effect of Dilutive Securities:
Assumed conversion as of the beginning of the period of preferred shares outstanding during the period:
Common shares assumed issued for 5.75% cumulative convertible preferred stock			64		56
Common shares assumed issued for 5.75% cumulative convertible preferred stock (series A)			47		39
Common shares assumed issued for 5.00% cumulative convertible preferred stock (series 2005B)			8		5
Common shares assumed issued for 4.50% cumulative convertible preferred stock			9		6
Unvested restricted stock			—		9
Outstanding stock options			—		1
Diluted EPS	$		1,269		752	$	1.69
Nine Months Ended September 30, 2010:
Basic EPS	$		1,482		631	$	2.35
Effect of Dilutive Securities:
Assumed conversion as of the beginning of the period of preferred shares outstanding during the period:
Common shares assumed issued for 5.75% cumulative convertible preferred stock			28		24
Common shares assumed issued for 5.75% cumulative convertible preferred stock (series A)			23		20
Common shares assumed issued for 5.00% cumulative convertible preferred stock (series 2005B)			8		5
Common shares assumed issued for 4.50% cumulative convertible preferred stock			9		6
Unvested restricted stock			—		5
Outstanding stock options			—		1
Diluted EPS	$		1,550		692	$	2.24