CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net income (loss)	$ (2.1)	$ 99.6
Depreciation and amortization	26.4	21.7
Stock-based compensation expense	6.8	8.3
Deferred income taxes	1.0	3.8
Gain on sale of assets	(1.0)	(2.1)
Foreign currency transaction gains	(1.5)	(1.2)
Other non-cash adjustments	(0.6)	(0.2)
Changes in operating assets and liabilities	299.9	196.9
Net cash provided by operating activities	328.9	326.8
Investing activities:
Additions to property, plant and equipment	(26.1)	(16.7)
Additions to equipment held for rental	(1.9)	(2.2)
Acquisition of business, net of cash acquired		(112.1)
Proceeds from sale of equipment held for rental	3.2	5.1
Other investing activities	(15.3)	3.6
Net cash used by investing activities	(40.1)	(122.3)
Financing activities:
Repayments of debt (original maturities greater than three months)	(225.0)
Debt issuance costs	(2.5)
Repurchases of Common Stock	(85.4)
Dividends paid	(24.5)	(22.7)
Proceeds from exercise of stock options	1.9	18.2
Other financing activities	(2.4)	(1.2)
Net cash used by financing activities	(337.9)	(5.7)
Effect of exchange rate changes on cash	(2.1)	(4.2)
Increase (decrease) in cash and cash equivalents	(51.2)	194.6
Cash and cash equivalents at beginning of period	995.7	898.6
Cash and cash equivalents at end of period	944.5	1,093.2
Supplemental disclosures:
Cash paid for interest	10.1	11.6
Cash paid for income taxes	5.3	83.9
Proceeds from income tax refunds	0.3
Cash paid for operating lease liabilities	11.5	13.8
Operating right-of-use assets obtained	$ 2.8	$ 7.9