Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2018

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Derivative Instruments, Gain (Loss) in Statement of Financial Performance [Table Text Block]

Financial Statement Presentation

Gains and losses on derivative financial instruments for the years ended December 31, 2018 and 2017 are as follows:

	Amount of Gain (Loss)
	Recorded Income (Loss) in AOCI, net of tax					Reclassified from AOCI into Income (Loss)						Recorded in Income (Loss)
	2018		2017			2018			2017			2018		2017
	(Dollars in Millions)
Foreign currency risk – Cost of sales:
Cash flow hedges	$	—	$	(2	)	$	1		$	(6	)	$	—	$	—
Non-designated cash flow hedges	—		—			—			—			2		2
Interest rate risk - Interest expense, net:
Net investment hedges	9		(22		)	2			—			—		—
Interest rate swap	1		1			(1		)	(1		)	—		—
	$	10	$	(23	)	$	2		$	(7	)	$	2	$	2