Income Taxes (Unaudited) (Tables)

6 Months Ended

Jun. 30, 2014

Income Tax Disclosure [Abstract]

Schedule of Income Tax Expense and Effective Income Tax Rates

	Three Months Ended June 30						Six Months Ended June 30
$ in millions	2014			2013			2014			2013
Federal and foreign income tax expense	$	245		$	236		$	452		$	459
Effective income tax rate	32.4		%	32.6		%	29.3		%	32.0		%