Income Tax (Tables)

3 Months Ended

Mar. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]

The provision for income tax differed from the amounts computed by applying the U.S. federal income tax statutory rate of 21% to pre-tax income as a result of the following for the three months ended March 31, 2020 and 2019, respectively (dollars in millions):

	Three months ended March 31,
	2020			2019
Tax provision at U.S. statutory rate	$	(20	)	$	45
Increase (decrease) in income taxes resulting from:
Tax rate differences on income in other jurisdictions	4			1
Differences in tax bases in foreign jurisdictions	3			(15		)
Deferred tax valuation allowance	(4		)	19
Amounts related to uncertain tax positions	6			1
Corporate rate changes	—			(2		)
Equity compensation excess benefit	(1		)	(2		)
Non-Deductible Expenses	4			—
Total provision for income taxes	$	(8	)	$	47
Effective tax rate	8.9		%	21.7		%