Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2015

Earnings Per Share, Basic and Diluted, Other Disclosures [Abstract]

Antidilutive Securities Excluded From Computation Of Earnings Per Share

For the Current Quarter, the Prior Quarter, the Current Period and the Prior Period, shares of the following securities and associated adjustments to net income, representing dividends on preferred stock and allocated earnings on participating securities, were excluded from the calculation of diluted EPS as the effect was antidilutive.

	Net Income Adjustments		Shares
	($ in millions)		(in millions)
Three Months Ended September 30, 2015
Common stock equivalent of our preferred stock outstanding:
5.75% cumulative convertible preferred stock	$	21	59
5.75% cumulative convertible preferred stock (series A)	$	16	42
5.00% cumulative convertible preferred stock (series 2005B)	$	3	6
4.50% cumulative convertible preferred stock	$	3	6
Three Months Ended September 30, 2014
Common stock equivalent of our preferred stock outstanding:
5.75% cumulative convertible preferred stock	$	21	59
5.75% cumulative convertible preferred stock (series A)	$	16	42
5.00% cumulative convertible preferred stock (series 2005B)	$	3	6
4.50% cumulative convertible preferred stock	$	3	6
Participating securities	$	3	3
Nine Months Ended September 30, 2015
Common stock equivalent of our preferred stock outstanding:
5.75% cumulative convertible preferred stock	$	64	59
5.75% cumulative convertible preferred stock (series A)	$	47	42
5.00% cumulative convertible preferred stock (series 2005B)	$	8	6
4.50% cumulative convertible preferred stock	$	9	6
Participating securities	$	—	1
Nine Months Ended September 30, 2014
Common stock equivalent of our preferred stock outstanding:
5.75% cumulative convertible preferred stock	$	64	59
5.75% cumulative convertible preferred stock (series A)	$	47	42
5.00% cumulative convertible preferred stock (series 2005B)	$	8	6
4.50% cumulative convertible preferred stock	$	9	6
Participating securities	$	14	3