Income Taxes (Tables)

12 Months Ended

Dec. 31, 2020

Income Tax Disclosure [Abstract]

Schedule of income before tax

(Dollars in millions)	Year Ended December 31
Loss before income taxes	2020		2019		2018
U.S.	$	(400)	$	(230)	$	(54)
Non-U.S.	(112)		(291)		(199)
Total	$	(512)	$	(521)	$	(253)

Schedule of components of income tax expense (benefit)

(Dollars in millions)	Year Ended December 31
Provision for income taxes	2020		2019		2018
Current
Non-U.S.	$	31	$	7	$	22
Deferred
U.S. federal	—		(9)		(4)
State	—		2		—
Non-U.S.	1		1		24
Total income tax expense	$	32	$	1	$	42

Schedule of effective income tax rate reconciliation

(Dollars in millions)	Year Ended December 31
Effective income tax rate	2020		2019		2018
U.S. federal income tax rate	$	(108)	$	(109)	$	(53)
Foreign tax rate variances	(1)		(8)		1
State taxes, net of federal benefit	(7)		(6)		—
Tax credits	(6)		(7)		(9)
Change in Valuation Allowances	113		120		79
Non-Controlling Interest	—		2		3
Earnings of equity investments	14		15		13
Withholding taxes	3		4		5
Tax on divestiture	23		—		—
Convertible debt	—		(10)		—
Other, net	1		—		3
Provision for income taxes	$	32	$	1	$	42

Schedule of deferred tax assets and liabilities

(Dollars in millions)	As of December 31
Deferred taxes	2020		2019
Assets
Provisions	$	43	$	42
Costs capitalized for tax	—		1
Intangibles assets	7		12
Tax receivables, principally net operating loss carryforward	262		130
Credits	14		8
Lease liabilities	29		29
Other	6		4
Deferred tax assets before allowances	$	361	$	226
Valuation allowances	(323)		(179)
Total	$	38	$	47
Liabilities
Property, plant and equipment	(5)		(9)
Distribution taxes	(2)		(4)
Convertible Senior Notes	(8)		(10)
Operating lease right-of-use assets	(29)		(30)
Total	$	(44)	$	(53)
Net deferred tax liability	$	(6)	$	(6)

Summary of valuation allowance

The following table summarizes the activity related to the Company’s valuation allowances:

(Dollars in millions)	As of December 31
Valuation Allowances Against Deferred Tax Assets	2020		2019
Allowances at beginning of year	$	179	$	125
Benefits reserved current year	133		102
Translation difference	11		(1)
Held for sale	—		(47)
Allowances at end of year	$	323	$	179

Schedule of unrecognized tax benefits

The following table summarizes the activity related to the Company’s unrecognized tax benefits:

(Dollars in millions)	As of December 31
Unrecognized Tax Benefits	2020		2019
Unrecognized tax benefits at beginning of year	$	4	$	2
Increases as a result of tax positions taken during the current period	3		2
Total unrecognized tax benefits at end of year	$	7	$	4