Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Operating Activities:
Net income (loss)	$ (16.2)	$ (1,559.6)	$ 265.0
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	143.9	143.3	151.1
Deferred taxes	1.0	69.9	(40.9)
Impairment of goodwill	0.0	287.0	0.0
Debt extinguishment charge	65.5	21.5	21.6
Gain from disposal of property, plant and equipment, net	(2.9)	(2.9)	(90.6)
Net loss (gain) from sales of businesses	(13.8)	0.0	7.1
Non-cash restructuring charges	0.0	1,041.5	0.0
Non-cash joint venture impairment charge	0.0	0.0	11.4
Change in operating assets and liabilities:
Retirement benefits	(110.7)	(91.9)	(103.3)
Accounts receivable	(126.0)	208.4	(52.1)
Inventories	(53.9)	158.2	25.2
Accounts payable	88.5	(230.5)	30.1
Accrued income taxes	(2.6)	2.4	4.9
Accrued liabilities and other	43.3	119.6	0.6
Cash provided by operating activities	16.1	166.9	230.1
Investing Activities:
Purchases of property, plant and equipment	(152.6)	(136.5)	(168.2)
Proceeds from disposal of property, plant and equipment	20.8	5.9	92.0
Proceeds from sale of businesses, net of transaction costs	53.1	0.0	158.1
Other	1.4	1.9	(0.2)
Cash provided by (used in) investing activities	(77.3)	(128.7)	81.7
Financing Activities:
Borrowings on long-term debt	675.7	391.4	350.0
Payments on long-term debt and finance leases	(515.6)	(212.1)	(507.6)
Net borrowings under credit facilities	21.7	0.2	4.9
Purchase of convertible note capped call	0.0	(19.4)	0.0
Debt issuance costs	(9.5)	(9.1)	(5.5)
Debt extinguishment charge	(64.5)	(19.1)	(20.9)
Dividends paid to noncontrolling interests	0.0	(7.2)	(14.0)
Shares repurchased for income tax withholding on share-based compensation	(4.8)	(7.8)	(9.9)
Cash provided by (used in) financing activities	103.0	116.9	(203.0)
Increase in cash and cash equivalents	41.8	155.1	108.8
Cash and cash equivalents at beginning of year	645.9	490.8	382.0
Cash and cash equivalents at end of year	$ 687.7	$ 645.9	$ 490.8