Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Operating Activities
Net Income	$ 292.4	$ 374.7	$ 305.5
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	167.1	160.6	146.0
Impairment charges	0.4	2.6	1.3
Loss (gain) on sale of assets	0.9	(3.6)	0.3
Gain on disposal of lease assets	0.0	(0.4)	0.0
Bargain purchase price gain	(11.1)	0.0	0.0
Loss on divestitures	0.0	0.0	0.8
Deferred income tax benefit	(23.2)	(8.9)	(21.4)
Stock-based compensation expense	23.2	27.1	32.3
Pension and other postretirement expense	17.4	2.2	20.7
Pension and other postretirement benefit contributions and payments	(20.6)	(43.4)	(18.7)
Changes in operating assets and liabilities:
Accounts receivable	(20.7)	24.1	(66.4)
Unbilled receivables	18.5	(12.6)	(21.8)
Inventories	27.4	50.7	(87.1)
Accounts payable, trade	22.6	19.9	(20.2)
Other accrued expenses	55.1	(26.8)	32.2
Income taxes	8.5	(14.2)	1.9
Other, net	19.7	(1.9)	27.1
Net Cash Provided by Operating Activities	577.6	550.1	332.5
Investing Activities
Capital expenditures	(121.6)	(140.6)	(112.6)
Acquisitions, net of cash acquired of $5.9 million in 2019 and $30.1 million in 2018	(24.0)	(226.5)	(765.4)
Proceeds from disposals of property, plant and equipment	1.5	6.3	1.5
Proceeds from divestitures	0.0	0.0	14.0
Investments in short-term marketable securities, net	(9.4)	(4.1)	(2.7)
Net Cash Used in Investing Activities	(153.5)	(364.9)	(865.2)
Financing Activities
Cash dividends paid to shareholders	(87.0)	(84.9)	(85.7)
Purchase of treasury shares	(49.3)	(62.7)	(98.5)
Proceeds from exercise of stock options	37.4	27.5	12.8
Payments related to tax withholding for stock-based compensation	(16.0)	(15.4)	(5.4)
Proceeds from long-term debt	562.0	662.8	1,391.1
Payments on long-term debt	(757.7)	(633.8)	(663.8)
Deferred financing costs	(1.7)	(1.9)	(1.2)
Accounts receivable facility financing borrowings	144.0	25.0	152.0
Accounts receivable facility financing payments	(186.0)	0.0	(139.9)
Short-term debt activity, net	40.1	(17.0)	(6.7)
Noncontrolling interest dividends paid	(16.9)	(0.3)	(1.6)
Net Cash (Used in) Provided by Financing Activities	(331.1)	(100.7)	553.1
Effect of exchange rate changes on cash	11.9	(1.4)	(12.7)
Increase In Cash, Cash Equivalents and Restricted Cash	104.9	83.1	7.7
Cash, cash equivalents and restricted cash at beginning of year	216.2	133.1	125.4
Cash, Cash Equivalents and Restricted Cash at End of Year	$ 321.1	$ 216.2	$ 133.1