Equity and Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2021

Equity [Abstract]

Schedule of Components in Accumulated Other Comprehensive Income

The changes in the balances of Accumulated other comprehensive income (loss) by component are as follows:

(dollars in millions)	Foreign currency translation adjustments		Unrealized gains (losses) on cash flow hedges		Unrealized gains (losses) on marketable securities		Defined benefit pension and postretirement plans		Total
Balance at January 1, 2019	$	(600)	$	(80)	$	20	$	3,030	$	2,370
Other comprehensive income (loss)	16		(699)		8		—		(675)
Amounts reclassified to net income	—		(37)		(1)		(659)		(697)
Net other comprehensive income (loss)	16		(736)		7		(659)		(1,372)
Balance at December 31, 2019	(584)		(816)		27		2,371		998
Other comprehensive income (loss)	180		953		7		—		1,140
Amounts reclassified to net income	—		(1,524)		(9)		(676)		(2,209)
Net other comprehensive income (loss)	180		(571)		(2)		(676)		(1,069)
Balance at December 31, 2020	(404)		(1,387)		25		1,695		(71)
Other comprehensive income (loss)	(141)		(1,318)		(8)		—		(1,467)
Amounts reclassified to net income	—		1,233		(1)		(621)		611
Net other comprehensive income (loss)	(141)		(85)		(9)		(621)		(856)
Balance at December 31, 2021	$	(545)	$	(1,472)	$	16	$	1,074	$	(927)