Income Taxes (Tables)

9 Months Ended

Sep. 30, 2020

Income Tax Disclosure [Abstract]

Tax Expense (Benefit) and Effective Tax Rate

	For the Three Months Ended September 30,						For the Nine Months Ended September 30,
	2020			2019			2020			2019
	(Dollars in millions)
Tax (benefit) expense	$	(1	)	$	34		$	11		$	79
Effective tax rate		(10.0	)%		47.2	%		16.9	%		30.9	%