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Consolidated Statements of Comprehensive Income (Loss) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Net income (loss)	$ 5.9	$ (561.1)	$ (484.1)
Other comprehensive income (loss)
Defined benefit plans, net of $(18.2) million, $12.7 million and $3.0 million of tax in 2021, 2020 and 2019, respectively	69.1	(51.1)	(18.3)
Foreign currency translation adjustments	(10.2)	(0.2)	(4.6)
Changes in cash flow hedges, net of tax of $(3.9) million, $1.3 million and $6.1 million in 2021, 2020 and 2019, respectively	8.5	(4.4)	(14.6)
Other comprehensive income (loss)	67.4	(55.7)	(37.5)
Comprehensive income (loss)	73.3	(616.8)	(521.6)
Net income attributable to noncontrolling interests	0.0	(0.2)	(0.4)
Foreign currency translation adjustments attributable to noncontrolling interests	0.0	0.3	0.0
Comprehensive income (loss) attributable to AAM	$ 73.3	$ (616.7)	$ (522.0)

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