Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Cash flows from operating activities:
Net income	$ 350.1	$ 140.4	$ 392.9
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	99.2	110.0	79.8
Amortization of inventory step-up adjustment to fair value		7.6
Amortization of debt issuance costs and original issue discount	2.7	7.1	4.7
Stock-based compensation	29.5	49.2	27.3
Provision for excess and obsolete inventory	24.8	24.7	22.3
Provision for doubtful accounts	0.1	(0.7)	1.4
Deferred income taxes	(7.1)	(4.2)	(19.4)
Gain on sale of long-lived asset		(6.8)
Asset impairment	2.3	4.7
Other	0.6	0.9	2.6
Changes in operating assets and liabilities, net of business acquired:
Trade accounts receivable	(44.8)	(0.1)	(0.5)
Inventories	(52.2)	(29.3)	(73.8)
Income taxes payable	21.6	(12.4)	(11.4)
Other current and non-current assets	40.9	(9.8)	(1.6)
Current and non-current accrued compensation	19.4	(4.2)	(8.6)
Other current and non-current liabilities	5.1	(8.4)	(3.9)
Accounts payable	21.0	(24.2)	2.0
Net cash provided by operating activities	513.2	244.5	413.8
Cash flows (used in) provided by investing activities:
Acquisition of business, net of cash acquired		(988.6)
Purchases of investments	(522.4)	(246.3)	(253.6)
Maturities of investments	332.4	142.6	181.7
Sales of investments	72.5	166.9	207.5
Proceeds from sale of assets		42.1
Purchases of property, plant and equipment	(84.9)	(63.9)	(62.9)
Net cash (used in) provided by investing activities	(202.4)	(947.2)	72.7
Cash flows (used in) provided by financing activities:
Net proceeds from short and long-term borrowings	27.0	642.2	67.7
Payments of short-term borrowings	(24.7)	(5.4)	(67.2)
Payments of long-term borrowings	(59.1)	(106.1)	(50.0)
Repurchases of common stock			(75.0)
Net payments related to employee stock awards	(20.7)	(11.0)	(11.1)
Dividend payments	(44.0)	(43.5)	(42.4)
Net cash (used in) provided by financing activities	(121.5)	476.2	(178.0)
Effect of exchange rate changes on cash and cash equivalents	4.4	(3.2)	1.9
Increase (decrease) in cash and cash equivalents	193.7	(229.7)	310.4
Cash and cash equivalents at beginning of period	414.6	644.3	333.9
Cash and cash equivalents at end of period	608.3	414.6	644.3
Cash paid during the period for:
Interest	26.3	39.9	14.6
Income taxes	$ 65.6	$ 35.5	$ 91.8