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Other (Income) Expense, Net (Tables)

9 Months Ended

Sep. 30, 2021

Other Income and Expenses [Abstract]

Other (income) expense, net, consisted of:


	Three Months Ended September 30,				Nine Months Ended September 30,
($ in millions)	2021		2020		2021		2020
Interest income	$	(7)	$	(9)	$	(27)	$	(48)
Interest expense	196		203		597		624
Exchange losses	46		10		202		89
Income from investments in equity securities, net (1)	(683)		(360)		(1,535)		(964)
Net periodic defined benefit plan cost (credit) other than service cost	40		(88)		(159)		(259)
Other, net	(42)		(68)		(85)		(79)
	$	(450)	$	(312)	$	(1,007)	$	(637)

(1) Includes net realized and unrealized gains and losses from investments in equity securities either owned directly or through ownership interests in investment funds. Unrealized gains and losses from investments that are directly owned are determined at the end of the reporting period, while ownership interests in investment funds are accounted for on a one quarter lag. The Company estimates that gains of approximately $540 million will be recorded in the fourth quarter of 2021 from ownership interests in investment funds.