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Condensed Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Net income	$ 86.3	$ 61.7	$ 231.0	$ 193.8
Other comprehensive income (loss)
Defined benefit plans, net of tax (a)	3.1	0.6	3.7	5.3
Foreign currency translation adjustments	42.8	(0.8)	79.3	15.0
Changes in cash flow hedges, net of tax (b)	1.1	(4.1)	21.5	(6.4)
Other comprehensive income (loss)	47.0	(4.3)	104.5	13.9
Comprehensive income	133.3	57.4	335.5	207.7
Net income attributable to noncontrolling interests	(0.1)	0.0	(0.2)	0.0
Comprehensive income attributable to AAM	$ 133.2	$ 57.4	$ 335.3	$ 207.7

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount of Net Income (Loss) attributable to noncontrolling interest.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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