Income Taxes (Tables)

12 Months Ended

Dec. 31, 2021

Income Tax Disclosure [Abstract]

Schedule of Income Before Tax

(Dollars in millions)	Year Ended December 31
Loss before income taxes	2021		2020		2019
U.S.	$	(212)	$	(400)	$	(230)
Non-U.S.	(157)		(112)		(291)
Total	$	(369)	$	(512)	$	(521)

Schedule of Components Of Income Tax Expense (Benefit)

(Dollars in millions)	Year Ended December 31
Provision for income taxes	2021		2020		2019
Current
Non-U.S.	$	15	$	31	$	7
Deferred
U.S. federal	—		—		(9)
State	—		—		2
Non-U.S.	1		1		1
Total income tax expense	$	16	$	32	$	1

Schedule of Effective Income Tax Rate Reconciliation

(Dollars in millions)	Year Ended December 31
Effective income tax rate	2021		2020		2019
U.S. federal income tax rate	$	(78)	$	(108)	$	(109)
Foreign tax rate variances	3		(1)		(8)
State taxes, net of federal benefit	(3)		(7)		(6)
Tax credits	(3)		(6)		(7)
Change in Valuation Allowances	89		113		120
Non-Controlling Interest	—		—		2
Earnings of equity investments	—		14		15
Withholding taxes	7		3		4
Tax on divestiture	—		23		—
Convertible debt	—		—		(10)
Other, net	1		1		—
Provision for income taxes	$	16	$	32	$	1

Schedule of Deferred Tax Assets And Liabilities

(Dollars in millions)	As of December 31
Deferred taxes	2021		2020
Assets
Provisions	$	41	$	43
Intangibles assets	4		7
Tax receivables, principally net operating loss carryforward	342		262
Credits	14		14
Lease liabilities	26		29
Other	12		6
Deferred tax assets before allowances	$	439	$	361
Valuation allowances	(408)		(323)
Total	$	31	$	38
Liabilities
Property, plant and equipment	(7)		(5)
Distribution taxes	(3)		(2)
Convertible Senior Notes	(6)		(8)
Operating lease right-of-use assets	(25)		(29)
Total	$	(41)	$	(44)
Net deferred tax liability	$	(10)	$	(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	2021		2020
Allowances at beginning of year	$	323	$	179
Benefits reserved current year	95		133
Benefits recognized current year	(1)		—
Translation difference	(9)		11
Allowances at end of year	$	408	$	323

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	2021		2020
Unrecognized tax benefits at beginning of year	$	7	$	4
Increases as a result of tax positions taken during the current period	1		3
Decreases as a result of tax positions taken during a prior period	(1)		—
Total unrecognized tax benefits at end of year	$	7	$	7