Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2017

Derivative Instruments, Gain (Loss) [Line Items]

Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]

The following table summarizes the fair value of derivative instruments as of December 31, 2017 and 2016, which consist solely of foreign exchange contracts:

	Asset Derivatives				Liability Derivatives
(dollars in millions)	2017		2016		2017		2016
Derivatives designated as hedging instruments	$	178	$	15	$	18	$	196
Derivatives not designated as hedging instruments	75		155		60		158

Reclassification out of Accumulated Other Comprehensive Income [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) [Table Text Block]

The impact from foreign exchange derivative instruments that qualified as cash flow hedges was as follows:

	Year Ended December 31,
(dollars in millions)	2017			2016
Gain recorded in Accumulated other comprehensive loss	$	347		$	75
(Gain) loss reclassified from Accumulated other comprehensive loss into Product sales (effective portion)	$	(39	)	$	171

Other Operating Income (Expense) [Member]

Derivative Instruments, Gain (Loss) [Line Items]

Derivative Instruments, Gain (Loss) [Table Text Block]

The effect on the Consolidated Statement of Operations of foreign exchange contracts not designated as hedging instruments was as follows:

	Year Ended December 31,
(dollars in millions)	2017		2016
Gain recognized in Other income, net	$	77	$	56