Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2016

Text Block [Abstract]

Schedule Of Basic And Diluted Earnings Per Share

		Years Ended December 31,
$ in millions except share and per share amounts		2016		2015			2014
Basic earnings per share:
	Net income (loss)	$	(338)	$	180	$	569
	Less: undistributed earnings allocated to participating securities		-		6		16
	Net income (loss) available to common shareholders		(338)		174		553
	Basic weighted average shares (1)		133,001,088		163,936,318		188,171,503
	Net income (loss) per basic common share	$	(2.54)	$	1.06	$	2.94
Diluted earnings per share:
	Net income (loss)	$	(338)	$	180	$	569
	Less: undistributed earnings allocated to participating securities		-		6		15
	Less: mark-to-market gain (loss) on warrants		-		-		28
	Net income (loss) available to common shareholders		(338)		174		526
	Basic weighted average shares (1)		133,001,088		163,936,318		188,171,503
	Effect of common stock equivalents:
	Stock options		-		933,470		1,104,247
	Warrants		-		-		1,622,877
	Diluted weighted average shares		133,001,088		164,869,788		190,898,627
	Net income (loss) per diluted common share	$	(2.54)	$	1.06	$	2.76
	(1) Includes 930,406, 617,909 and 412,769 of participating securities that met the service condition and were eligible to receive nonforfeitable dividends or dividend
	equivalents for the years ended December 31, 2016, 2015 and 2014, respectively.