Income Taxes (Unaudited) (Tables)

9 Months Ended

Sep. 30, 2014

Income Tax Disclosure [Abstract]

Schedule of Income Tax Expense and Effective Income Tax Rates

	Three Months Ended September 30						Nine Months Ended September 30
$ in millions	2014			2013			2014			2013
Federal and foreign income tax expense	$	221		$	223		$	673		$	682
Effective income tax rate	31.8		%	31.0		%	30.1		%	31.6		%