COMBINED STATEMENT OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
COMBINED STATEMENT OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ (692.0)	$ (238.0)	$ (1,579.0)	$ (1,293.0)
Other comprehensive income (loss), before tax:
Foreign currency translation adjustments	(125.0)	121.0	(203.0)	(1.0)
Total unrealized gains (losses) on cash flow hedges	3.0		3.0
Retirement-related benefit plans:
Amortization of net (gains) losses	12.0	9.0	32.0	27.0
Total retirement-related benefit plans	12.0	9.0	32.0	27.0
Other comprehensive income (loss), before tax	(110.0)	131.0	(168.0)	26.0
Income tax (expense) benefit related to items of other comprehensive income (loss)	(3.0)	(2.0)	(10.0)	(8.0)
Other comprehensive income (loss), net of tax	(114.0)	128.0	(178.0)	18.0
Total comprehensive income (loss)	$ (806.0)	$ (110.0)	$ (1,756.0)	$ (1,275.0)