CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Operating activities:
Net income	$ 24.8	$ 313.5
Depreciation and amortization	53.3	51.0
Stock-based incentive compensation	13.5	13.7
Deferred income taxes	6.2	22.6
Gain on sale of assets	(1.7)	(4.4)
Unrealized loss on investments	11.2
Foreign currency transactions	2.4	(3.1)
Other non-cash adjustments	2.6	0.3
Changes in operating assets and liabilities	(135.2)	55.1
Net cash (used in) provided by operating activities	(22.9)	448.7
Investing activities:
Additions to property, plant and equipment	(110.3)	(39.2)
Additions to equipment held for rental	(4.6)	(5.5)
Acquisition of business, net of cash acquired	(19.5)	(112.6)
Proceeds from sale of equipment held for rental	5.4	6.6
Acquisition of equity securities	(12.6)	(9.3)
Other investing activities	2.4	6.3
Net cash used in investing activities	(139.2)	(153.7)
Financing activities:
Proceeds from debt (original maturities greater than three months)	10.4
Repayments of debt (original maturities greater than three months)	(225.0)
Repurchases of Common Stock	(155.0)	(13.0)
Dividends paid	(48.9)	(45.4)
Proceeds from exercise of stock options	2.3	37.5
Acquisition of Common Stock for taxes on stock-based compensation	(1.7)	(1.6)
Other financing activities	(7.5)	(2.5)
Net cash used in financing activities	(425.4)	(25.0)
Effect of exchange rate changes on cash and cash equivalents	(10.8)	(2.3)
Increase (decrease) in cash and cash equivalents	(598.3)	267.7
Cash and cash equivalents at beginning of period	995.7	898.6
Cash and cash equivalents at end of period	397.4	1,166.3
Supplemental disclosures:
Cash paid for interest	23.2	24.8
Cash paid for income taxes	205.7	146.4
Proceeds from income tax refunds	0.9
Cash paid for operating lease liabilities	24.3	26.0
Operating right-of-use assets obtained	$ 3.3	$ 80.0