Earnings Per Share (Tables)

12 Months Ended

Dec. 31, 2013

Text Block [Abstract]

Schedule Of Basic And Diluted Earnings Per Share

		Years Ended December 31,
$ in millions except share and per share amounts		2013		2012			2011
Basic earnings per share:
	Net income (loss)	$	250	$	1,234	$	(1,319)
	Less: undistributed earnings allocated to participating securities		5		32		0
	Net income (loss) available to common shareholders		245		1,202(1)		(1,319)
	Basic weighted average shares (2)		189,071,011		188,834,626(1)		192,505,045(1)
	Net income (loss) per basic common share	$	1.30	$	6.36	$	(6.85)(1)
Diluted earnings per share:
	Net income (loss)		250		1,234		(1,319)
	Less: undistributed earnings allocated to participating securities		5		32		0
	Net income (loss) available to common shareholders		245		1,202(1)		(1,319)
	Basic weighted average shares (2)		189,071,011		188,834,626		192,505,045
	Effect of common stock equivalents:
	Stock options		1,241,902		1,062,395		0
	Diluted weighted average shares		190,312,913		189,897,021(1)		192,505,045(1)
	Net income (loss) per diluted common share	$	1.29	$	6.33	$	(6.85)(1)
	(1) Amounts shown are revised.
	(2) Includes 629,896, 506,714 and 565,819 of participating securities that met the service condition and were eligible to receive nonforfeitable dividends or dividend
	equivalents for the years ended December 31, 2013, 2012 and 2011, respectively.

Schedule Of Revised Basic And Diluted Earnings Per Share

		Years Ended December 31,			September 30, 2013 (unaudited)			June 30, 2013 (unaudited)			March 31, 2013 (unaudited)
$ in millions except share and per share amounts		2012		2011	Three Months Ended		Nine Months Ended	Three Months Ended		Six Months Ended	Three Months Ended
Numerator:
	Net income (loss) - basic and diluted as reported		$ 1,234	$ (1,319)		$ 132	$ 118		$ (178)	$ (14)	$ 164
	Net income (loss) - basic as revised		$ 1,202	$ (1,319)		$ 129	$ 115		$ (178)	$ (14)	$ 159
	Net income (loss) -diluted as revised		$ 1,202	$ (1,319)		$ 101	$ 110		$ (178)	$ (14)	$ 159
Denominator:
	Weighted average shares - basic as reported		193,842,435	197,019,968		192,711,608	193,440,078		193,104,610	193,810,351	194,523,933
	Weighted average shares - basic as revised		188,834,626	192,505,045		188,931,800	189,094,678		189,163,527	189,135,587	189,111,170
	Weighted average shares - diluted as reported		194,904,830	197,019,968		196,746,771	197,762,488		193,104,610	193,810,351	195,631,960
	Weighted average shares - diluted as revised		189,897,021	192,505,045		192,581,064	193,031,189		189,163,527	189,135,587	190,219,197
Net income (loss) per common share:
	Basic - as reported		$ 6.36	$ (6.69)		$ 0.68	$ 0.61		$ (0.92)	$ (0.07)	$ 0.84
	Basic - as revised		$ 6.36	$ (6.85)		$ 0.68	$ 0.61		$ (0.94)	$ (0.07)	$ 0.84
	Diluted - as reported		$ 6.33	$ (6.69)		$ 0.67	$ 0.60		$ (0.92)	$ (0.07)	$ 0.84
	Diluted - as revised		$ 6.33	$ (6.85)		$ 0.52	$ 0.57		$ (0.94)	$ (0.07)	$ 0.84