CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CONSOLIDATED STATEMENT OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ (229)	$ (494)
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	(51)	(96)
Unrealized gains (losses) arising during the period	1
Reclassification of (gains) losses to net income	(1)
Retirement-related benefit plans:
Net gains (losses) arising during the period	136	5
Amortization of prior service (credits) costs	4
Amortization of net (gains) losses	16	10
Total retirement-related benefit plans	156	16
Other comprehensive income (loss), before tax	105	(81)
Income tax (expense) benefit related to items of other comprehensive income (loss)	(50)	(5)
Other comprehensive income (loss), net of tax	54	(86)
Total comprehensive income (loss)	$ (175)	$ (580)