Condensed Consolidated Balance Sheets - USD ($) $ in Millions	Jun. 30, 2019	Dec. 31, 2018
Current assets
Cash and cash equivalents	$ 248.8	$ 476.4
Accounts receivable, net	1,138.0	966.5
Inventories, net	459.9	459.7
Prepaid expenses and other	130.0	127.2
Total current assets	1,976.7	2,029.8
Property, plant and equipment, net	2,544.4	2,514.4
Deferred income taxes	51.9	45.5
Goodwill	1,140.9	1,141.8
Other intangible assets, net	1,063.1	1,111.1
GM postretirement cost sharing asset	224.1	219.4
Other assets and deferred charges	546.8	448.7
Total assets	7,547.9	7,510.7
Current liabilities
Current portion of long-term debt	26.0	121.6
Accounts payable	853.4	840.2
Accrued compensation and benefits	159.6	179.0
Deferred revenue	33.6	44.3
Accrued expenses and other	194.5	171.7
Total current liabilities	1,267.1	1,356.8
Long-term debt, net	3,674.2	3,686.8
Deferred revenue	87.5	77.6
Deferred income taxes	67.4	92.6
Postretirement benefits and other long-term liabilities	879.5	810.6
Total liabilities	5,975.7	6,024.4
Stockholders' equity
Common stock, par value $0.01 per share; 150.0 million shares authorized; 120.1 million shares issued as of June 30, 2019 and 118.9 million shares issued as of December 31, 2018	1.2	1.2
Paid-in capital	1,303.8	1,292.6
Retained earnings	827.2	703.5
Treasury stock at cost, 7.6 million shares as of June 30, 2019 and 7.2 million shares as of December 31, 2018	(209.3)	(201.8)
Accumulated other comprehensive loss
Defined benefit plans, net of tax	(239.8)	(213.9)
Foreign currency translation adjustments	(94.2)	(96.6)
Unrecognized loss on cash flow hedges, net of tax	(19.4)	(1.1)
Total AAM stockholders' equity	1,569.5	1,483.9
Noncontrolling interests in subsidiaries	2.7	2.4
Total stockholders' equity	1,572.2	1,486.3
Total liabilities and stockholders' equity	$ 7,547.9	$ 7,510.7