Income Taxes (Unaudited) (Tables)

6 Months Ended

Jun. 30, 2021

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	2021			2020			2021			2020
Federal and foreign income tax expense	$	265		$	198		$	1,086		$	383
Effective income tax rate	20.4		%	16.5		%	25.2		%	17.0		%