Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2020

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 and presentation in the Consolidated Balance Sheets for derivative instruments as of December 31:

(dollars in millions)	Balance Sheet Location	2020		2019
Derivatives designated as hedging instruments:
Foreign exchange contracts	Other assets, current	$	197	$	23
	Other accrued liabilities	66		166
Derivatives not designated as hedging instruments:
Foreign exchange contracts	Other assets, current	44		23
	Other accrued liabilities	32		116

Other Income (Expense) [Member]

Derivative Instruments, Gain (Loss) [Line Items]

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

The effect of derivatives not designated as hedging instruments within Other income, net, on the Consolidated Statement of Operations was as follows:

	Year Ended December 31,
(dollars in millions)	2020		2019
Foreign exchange contracts gain (loss)	$	(76)	$	91

Reclassification out of Accumulated Other Comprehensive Income [Member]

Derivative Instruments, Gain (Loss) [Line Items]

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

The amounts of gain or (loss) are attributable to foreign exchange contract activity and are recorded as a component of Product sales when reclassified from accumulated other comprehensive income (loss).

	Year Ended December 31,
(dollars in millions)	2020		2019
Gain (loss) recorded in Accumulated other comprehensive loss	$	181	$	(33)
Loss reclassified from Accumulated other comprehensive loss into Product sales	82		51