Income Tax (Tables)

3 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Effective Tax Rate

Effective Tax Rate

	Three Months Ended December 31
	2020			2019
	(Dollars in millions)
(Provision) benefit for income taxes	$	(29	)	$	(4	)
Effective tax rate		29	%		7	%