Income Taxes (Unaudited) (Tables)

9 Months Ended

Sep. 30, 2021

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	2021			2020			2021			2020
Federal and foreign income tax expense	$	212		$	181		$	1,298		$	564
Effective income tax rate	16.6		%	15.5		%	23.2		%	16.5		%