Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Activities:
Net income (loss)	$ (1,559.6)	$ 270.1	$ 236.7
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	143.3	151.1	156.4
Deferred taxes	69.9	(40.9)	2.1
Gain on joint venture deconsolidation	0.0	0.0	(15.9)
Impairment of goodwill	287.0	0.0	0.0
Debt extinguishment charge	21.5	21.6	0.0
Gain from disposal of property, plant and equipment, net	(2.9)	(90.6)	(1.2)
Net loss from sales of businesses	0.0	1.8	0.0
Non-cash restructuring charges	1,041.5	0.0	0.0
Non-cash joint venture impairment charge	0.0	11.4	0.0
Change in operating assets and liabilities:
Retirement benefits	(91.9)	(103.3)	(32.6)
Accounts receivable	208.4	(52.1)	16.0
Inventories	158.2	25.4	(108.5)
Accounts payable	(230.5)	30.1	153.7
Accrued income taxes	2.4	4.9	1.4
Accrued liabilities and other	119.6	0.6	(15.3)
Cash provided by operating activities	166.9	230.1	392.8
Investing Activities:
Purchases of property, plant and equipment	(136.5)	(168.2)	(139.2)
Proceeds from disposal of property, plant and equipment	5.9	92.0	2.8
Purchases of businesses	0.0	0.0	(10.0)
Proceeds from sale of businesses, net of transaction costs	0.0	158.1	0.0
Other	1.9	(0.2)	1.3
Cash provided by (used in) investing activities	(128.7)	81.7	(145.1)
Financing Activities:
Borrowings on long-term debt	391.4	350.0	7.1
Payments on long-term debt and finance leases	(212.1)	(507.6)	(6.4)
Net borrowings (payments) under credit facilities	0.2	4.9	(5.9)
Purchase of convertible note capped call	(19.4)	0.0	0.0
Debt issuance costs	(9.1)	(5.5)	0.0
Debt extinguishment charge	(19.1)	(20.9)	0.0
Dividends paid to noncontrolling interests	(7.2)	(14.0)	(10.0)
Sale to noncontrolling interest	0.0	0.0	14.4
Shares repurchased for income tax withholding on share-based compensation	(7.8)	(9.9)	(6.5)
Cash (used in) provided by financing activities	116.9	(203.0)	(7.3)
Increase in cash and cash equivalents	155.1	108.8	240.4
Cash and cash equivalents at beginning of year	490.8	382.0	141.6
Cash and cash equivalents at end of year	$ 645.9	$ 490.8	$ 382.0