Juniper Networks (JNPR) 10-K 10 Feb 23 2022 FY Annual report Financial data

Cover Page

Cover Page - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Feb. 08, 2023	Jun. 30, 2022
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-34501
Entity Registrant Name	JUNIPER NETWORKS, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	77-0422528
Entity Address, Address Line One	1133 Innovation Way
Entity Address, City or Town	Sunnyvale,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94089
City Area Code	(408)
Local Phone Number	745-2000
Title of 12(b) Security	Common Stock, par value $0.00001 per share
Trading Symbol	JNPR
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Public Float			$ 9,011
Entity Common Stock, Shares Outstanding		323,959,789
Documents Incorporated by Reference	As noted herein, the information called for by Part III is incorporated by reference to specified portions of the registrant's definitive proxy statement to be filed in conjunction with the registrant's 2023 Annual Meeting of Stockholders, which is expected to be filed not later than 120 days after the registrant's fiscal year ended December 31, 2022.
Entity Central Index Key	0001043604
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	FY

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2022
Audit Information [Abstract]
Auditor Name	Ernst & Young LLP
Auditor Location	San Jose, California
Auditor Firm ID	42

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net revenues:
Net revenues	$ 5,301.2	$ 4,735.4	$ 4,445.1
Cost of revenues:
Cost of revenues	2,342.9	1,995.3	1,871.4
Gross margin	2,958.3	2,740.1	2,573.7
Operating expenses:
Research and development	1,036.1	1,007.2	958.4
Sales and marketing	1,133.4	1,052.7	938.8
General and administrative	249.5	249.8	255.4
Restructuring charges	20.2	42.9	68
Total operating expenses	2,439.2	2,352.6	2,220.6
Operating income	519.1	387.5	353.1
Gain on divestiture	45.8	0	0
Loss on extinguishment of debt	0	(60.6)	(55)
Other expense, net	(28.6)	(16.8)	(32.9)
Income before income taxes and loss from equity method investment	536.3	310.1	265.2
Income tax provision	60.5	57.4	7.4
Loss from equity method investment, net of tax	4.8	0	0
Net income	$ 471	$ 252.7	$ 257.8
Earnings Per Share [Abstract]
Basic (in dollars per share)	$ 1.46	$ 0.78	$ 0.78
Diluted (in dollars per share)	$ 1.43	$ 0.76	$ 0.77
Shares used in computing net income per share:
Basic (in shares)	322.1	324.4	330.4
Diluted (in shares)	329.5	331.6	335.2
Product
Net revenues:
Net revenues	$ 3,539.9	$ 3,078.1	$ 2,845
Cost of revenues:
Cost of revenues	1,761.7	1,409.4	1,278.6
Service
Net revenues:
Net revenues	1,761.3	1,657.3	1,600.1
Cost of revenues:
Cost of revenues	$ 581.2	$ 585.9	$ 592.8

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net income	$ 471	$ 252.7	$ 257.8
Available-for-sale debt securities:
Change in net unrealized gains and losses	(6.5)	(5)	5.7
Net realized losses (gains) reclassified into net income	0.4	(1.2)	(1.3)
Net change on available-for-sale debt securities	(6.1)	(6.2)	4.4
Cash flow hedges:
Change in net unrealized gains and losses	15.7	(13.5)	54.4
Net realized losses (gains) reclassified into net income	26.8	(25.2)	7.6
Net change on cash flow hedges	42.5	(38.7)	62
Change in foreign currency translation adjustments	(30.1)	(12.8)	7.7
Other comprehensive income (loss), net	6.3	(57.7)	74.1
Comprehensive income	$ 477.3	$ 195	$ 331.9

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 880.1	$ 922.5
Short-term investments	210.3	315.5
Accounts receivable, net of allowance for doubtful accounts of $11.1 and $6.7 as of December 31, 2022 and 2021, respectively	1,227.3	994.4
Inventory	619.4	272.6
Prepaid expenses and other current assets	680	451.6
Total current assets	3,617.1	2,956.6
Property and equipment, net	666.8	703
Operating lease assets	141.6	161.3
Long-term investments	139.6	455.5
Purchased intangible assets, net	160.5	284.3
Goodwill	3,734.4	3,762.1
Other long-term assets	866.7	564.2
Total assets	9,326.7	8,887
Current liabilities:
Accounts payable	347.4	273.7
Accrued compensation	306.1	336
Deferred revenue	1,020.5	937.9
Other accrued liabilities	404.9	328.9
Total current liabilities	2,078.9	1,876.5
Long-term debt	1,601.3	1,686.8
Long-term deferred revenue	642.6	475.7
Long-term income taxes payable	279.4	330.5
Long-term operating lease liabilities	117.7	142.2
Other long-term liabilities	131.7	58.4
Total liabilities	4,851.6	4,570.1
Commitments and contingencies (Note 15)
Stockholders' equity:
Preferred stock, $0.00001 par value; 10.0 shares authorized; none issued and outstanding	0	0
Common stock, $0.00001 par value; 1,000.0 shares authorized; 322.9 shares and 321.6 shares issued and outstanding as of December 31, 2022 and 2021, respectively	0	0
Additional paid-in capital	6,846.4	6,972.6
Accumulated other comprehensive income (loss)	4.2	(2.1)
Accumulated deficit	(2,375.5)	(2,653.6)
Total stockholders' equity	4,475.1	4,316.9
Total liabilities and stockholders' equity	$ 9,326.7	$ 8,887

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Statement of Financial Position [Abstract]
Allowance for doubtful accounts receivable, current	$ 11.1	$ 6.7
Convertible preferred stock - par value (in dollars per share)	$ 0.00001	$ 0.00001
Convertible preferred stock - shares authorized (in shares)	10,000,000	10,000,000
Convertible preferred stock - issued (in shares)	0	0
Convertible preferred stock - outstanding (in shares)	0	0
Common stock - par value (in dollars per share)	$ 0.00001	$ 0.00001
Common stock - shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock - shares issued (in shares)	322,900,000	321,600,000
Common stock - outstanding (in shares)	322,900,000	321,600,000

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash flows from operating activities:
Net income	$ 471	$ 252.7	$ 257.8
Adjustments to reconcile net income to net cash provided by operating activities:
Share-based compensation expense	209.3	222.6	190.2
Depreciation, amortization, and accretion	217.7	237.4	212.4
Operating lease assets expense	40.3	44.9	42.3
Gain on divestiture	(45.8)	0	0
Loss from equity method investment	4.8	0	0
Loss on extinguishment of debt	0	60.6	55
Deferred income taxes	(222.5)	71.7	(52.3)
Other	(2.6)	(1.1)	(2.9)
Changes in operating assets and liabilities, net of acquisitions:
Accounts receivable, net	(232)	(31.8)	(76.1)
Prepaid expenses and other assets	(658)	(310)	(117.8)
Accounts payable	67.4	0.2	56
Accrued compensation	(23.1)	70.3	38.7
Income taxes payable	21.1	24.3	(57.2)
Other accrued liabilities	(1.6)	(80.8)	4.4
Deferred revenue	251.6	128.7	61.5
Net cash provided by operating activities	97.6	689.7	612
Cash flows from investing activities:
Purchases of property and equipment	(105.1)	(100)	(100.4)
Proceeds from divestiture, net	89.1	0	0
Purchases of available-for-sale debt securities	(104.1)	(649.8)	(967)
Proceeds from sales of available-for-sale debt securities	118.2	546.1	360.4
Proceeds from maturities and redemptions of available-for-sale debt securities	390.3	394	865
Purchases of equity securities	(16.5)	(10.1)	(17.4)
Proceeds from sales of equity securities	47.7	25.6	9.7
Proceeds from Pulse note receivable	0	0	50
Payments for business acquisitions, net of cash and cash equivalents acquired	0	(182.6)	(438.1)
Subsequent payments related to acquisitions in prior years	(14.6)	(10.1)	(45.9)
Other	2.5	0.7	(5.2)
Net cash provided by (used in) investing activities	407.5	13.8	(288.9)
Cash flows from financing activities:
Repurchase and retirement of common stock	(315.2)	(443.5)	(381.1)
Proceeds from issuance of common stock	57.2	56.4	54.7
Payment of dividends	(270.4)	(259.1)	(264.1)
Payment of debt	0	(423.8)	(376.2)
Issuance of debt, net	0	0	792.4
Payment for debt extinguishment costs	0	(58.3)	(52.9)
Other	0	(3.4)	4.8
Net cash used in financing activities	(528.4)	(1,131.7)	(222.4)
Effect of foreign currency exchange rates on cash, cash equivalents, and restricted cash	(21.7)	(12.1)	5.8
Net (decrease) increase in cash, cash equivalents, and restricted cash	(45)	(440.3)	106.5
Cash, cash equivalents, and restricted cash at beginning of period	942.7	1,383	1,276.5
Cash, cash equivalents, and restricted cash at end of period	897.7	942.7	1,383
Supplemental disclosures of cash flow information:
Cash paid for interest, net of amounts capitalized	67.3	62.6	87.2
Cash paid for income taxes, net	253.2	113.2	84.1
Non-cash investing activity:
Equity method investment	$ 40.3	$ 0	$ 0

Consolidated Statements of Chan

Consolidated Statements of Changes in Stockholders' Equity - USD ($) shares in Millions, $ in Millions	Total	Shares	Common Stock and Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balance (shares) at Dec. 31, 2019		335.9
Balance at Dec. 31, 2019	$ 4,610.6		$ 7,370.5	$ (18.5)	$ (2,741.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	257.8				257.8
Other comprehensive income (loss), net	74.1			74.1
Issuance of common stock (in shares)		10
Issuance of common stock	54.7		54.7
Common stock assumed upon business combination	1.5		1.5
Repurchase and retirement of common stock (in shares)		(18.2)
Repurchase and retirement of common stock	(421.1)		(235.7)		(185.4)
Purchase of forward contract under accelerated share repurchase program ("ASR")	40		40
Share-based compensation expense	190		190
Payment of cash dividends	(264.1)		(264.1)
Balance (shares) at Dec. 31, 2020		327.7
Balance at Dec. 31, 2020	4,543.5		7,156.9	55.6	(2,669)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	252.7				252.7
Other comprehensive income (loss), net	(57.7)			(57.7)
Issuance of common stock (in shares)		9.9
Issuance of common stock	56.4		56.4
Common stock assumed upon business combination	2.7		2.7
Repurchase and retirement of common stock (in shares)		(16)
Repurchase and retirement of common stock	(443.5)		(206.2)		(237.3)
Share-based compensation expense	221.9		221.9
Payment of cash dividends	$ (259.1)		(259.1)
Balance (shares) at Dec. 31, 2021	321.6	321.6
Balance at Dec. 31, 2021	$ 4,316.9		6,972.6	(2.1)	(2,653.6)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	471				471
Other comprehensive income (loss), net	6.3			6.3
Issuance of common stock (in shares)		10.9
Issuance of common stock	57.2		57.2
Repurchase and retirement of common stock (in shares)		(9.6)
Repurchase and retirement of common stock	(315.2)		(122.3)		(192.9)
Share-based compensation expense	209.3		209.3
Payment of cash dividends	$ (270.4)		(270.4)
Balance (shares) at Dec. 31, 2022	322.9	322.9
Balance at Dec. 31, 2022	$ 4,475.1		$ 6,846.4	$ 4.2	$ (2,375.5)

Consolidated Statements of Ch_2

Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - $ / shares					3 Months Ended												12 Months Ended
	Oct. 25, 2022	Jul. 26, 2022	Apr. 26, 2022	Jan. 27, 2022	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Stockholders' Equity [Abstract]
Payments of cash dividends (in dollars per share)	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.84	$ 0.80	$ 0.80

Description of Business, Basis

Description of Business, Basis of Presentation and Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Description of Business, Basis of Presentation and Significant Accounting Policies	Note 1. Description of Business, Basis of Presentation and Significant Accounting Policies Description of Business Juniper Networks, Inc. (the “Company” or “Juniper”) designs, develops, and sells products and services for high-performance networks, to enable customers to build scalable, reliable, secure and cost-effective networks for their businesses, while achieving agility and improved operating efficiency through automation. Juniper challenges the inherent complexity that comes with networking in the multicloud era. Juniper does this with products, solutions and services that transform the way people connect, work and live. Juniper simplifies the process of transitioning to a secure and automated multicloud environment to enable secure, AI-driven networks that connect the world. Basis of Presentation The Consolidated Financial Statements, which include the Company and its wholly-owned subsidiaries, are prepared in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”). All intercompany balances and transactions have been eliminated. Use of Estimates The preparation of the financial statements and related disclosures in accordance with U.S. GAAP requires the Company to make judgments, assumptions, and estimates that affect the amounts reported in the Consolidated Financial Statements and the accompanying notes. The Company bases its estimates and assumptions on current facts, historical experience, and various other factors that it believes are reasonable under the circumstances, to determine the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ from these estimates. Cash, Cash Equivalents, and Investments Cash and Cash Equivalents Cash and cash equivalents consist of cash on hand, demand deposits with banks, highly liquid investments in money market funds, commercial paper, government securities, certificates of deposits, time deposits, and corporate debt securities, which are readily convertible into cash. All highly liquid investments with original maturities of three months or less from Juniper's purchase date are classified as cash equivalents. Investments in Available-for-Sale Debt Securities The Company's investments in debt securities are classified as available-for-sale and include the Company's fixed income securities and investments in privately-held companies, consisting of debt and redeemable preferred stock securities. Fixed income securities primarily consist of corporate debt securities, U.S. treasury securities, time deposits, asset-backed and mortgage-backed securities, certificate of deposits, commercial paper, U.S. government agency securities, and foreign government debt securities. Fixed income securities are initially recorded at cost and periodically adjusted to fair value in the Consolidated Balance Sheets. The Company periodically evaluates these investments to determine if impairment charges are required. The Company determines whether a credit loss exists for available-for-sale debt securities in an unrealized loss position. When the fair value of a security is below its amortized cost, the amortized cost will be reduced to its fair value and the resulting loss will be recorded in Consolidated Statements of Operations, if it is more likely than not that we are required to sell the impaired security before recovery of its amortized cost basis, or we have the intention to sell the security. If neither of these conditions are met, the Company considers the extent to which the fair value is less than the amortized cost, any changes to the rating of the security by a rating agency, and review of the issuer's financial statements. If factors indicate a credit loss exists, an allowance for credit loss is recorded through other expense, net, limited by the amount that the fair value is less than the amortized cost basis. The Company's privately-held debt and redeemable preferred stock securities are included in other long-term assets in the Consolidated Balance Sheets and are recorded at fair value. In determining the estimated fair value of such securities, the Company utilizes the most recent data available for the investee including known acquisition offers and subsequent funding rounds. The Company periodically evaluates these securities for indicators of impairment, including the inability to recover a portion of or the entire carrying amount of the investment, the inability of the investee to sustain earnings, the reduction in or termination of financial commitment to the investee from other investors, the intention to sell the investment, and whether it is more likely than not that the Company will be required to sell the investment before recovery of the entire amortized cost basis. If the Company determines that the decline in an investment's value indicates credit losses, the difference is recognized as an impairment loss in its Consolidated Statements of Operations. For all available-for-sale debt securities, unrealized gains and the amount of unrealized loss relating to factors other than credit loss are reported as a separate component of accumulated other comprehensive loss in the Consolidated Balance Sheets. Realized gains and losses are determined based on the specific identification method and are reported in the Consolidated Statements of Operations. Investments in Equity Securities The Company's investments in equity securities with readily determinable fair values consist of money market funds, amounts under the non-qualified compensation plan ("NQDC") that are invested in mutual funds, and investments in public companies. These investments are measured at fair value with changes in fair value recognized in the Consolidated Statements of Operations. Equity securities without readily determinable fair values include the Company's investments in privately-held companies consisting of non-redeemable preferred stock and common stock securities. The Company accounts for these securities at cost, adjusted for changes from observable transactions for identical or similar investments of the same issuer, less impairments. Fair value of these equity securities is reassessed when the Company identifies observable price changes indicating that an adjustment upward or downward to the carrying value is necessary. Any observable changes in fair value are recognized in earnings as of the date that the observable transaction took place, rather than the current reporting date. In addition, the Company periodically evaluates equity securities without readily determinable fair values to determine if impairment charges are required by evaluating whether an event or change in circumstance has occurred that may have a significant adverse effect on the fair value of the investment. A qualitative assessment is performed each reporting period to assess whether there are any impairment indicators, including, but not limited to, significant deterioration in the investee's earnings performance; credit rating; asset quality or business prospects; adverse change in the regulatory, economic, or technological environment; change in the general market condition of the geographic area or industry; acquisition offers; and the ability to continue as a going concern. If such indicators are present, the Company estimates the fair value of impaired investments and recognizes an impairment loss in the Consolidated Statement of Operations equal to the difference between the carrying value and fair value. The Company accounts for investments in companies over which it has the ability to exercise significant influence, but does not have control over the investee, under the equity method of accounting. The investment is initially measured at fair value and subsequently adjusted for any impairment, dividend received, plus or minus the Company's proportionate share of the equity method investee's income or loss. The Company records its interest in the net earnings or loss of its equity method investment along with adjustments for unrealized profits or losses on intra-entity transactions, within its Consolidated Statements of Operations. Depending on the timing of such financial statements of the investee, there may be a lag between the timing of such financial statement and the Company's quarter-end date. For the Company's sole equity method investment as of December 31, 2022, the Company's share of the investee's net earnings or loss is recorded two months in arrears. The Company records an impairment when factors indicate that the carrying amount of the investment might not be recoverable. Fair Value Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining fair value, the Company considers the principal or most advantageous market in which it transacts, and considers assumptions that market participants would use when pricing the asset or liability. The Company applies the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement: Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 2 – Quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. These inputs are valued using market-based approaches. Level 3 – Inputs are unobservable inputs based on the Company’s assumptions. These inputs, if any, are valued using internal financial models. Derivative Instruments The Company uses derivative instruments, primarily foreign currency forward and interest rate contracts, to hedge certain foreign currency and interest rate exposures. The Company does not enter into derivatives for speculative or trading purposes. The Company uses foreign currency forward contracts or options contracts to hedge certain forecasted foreign currency transactions relating to operating expenses. These derivatives are designated as cash flow hedges, which are carried at fair value with the derivative's gain or loss initially reported as a component of accumulated other comprehensive loss, and upon occurrence of the forecasted transaction, is subsequently reclassified into the costs of services or operating expense line item to which the hedged transaction relates. Cash flows from such hedges are classified as operating activities. The Company also uses foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement of certain monetary assets and liabilities denominated in non-functional currencies. These derivatives are carried at fair value with changes recorded in other expense, net in the Consolidated Statements of Operations in the same period as the changes in the fair value from the re-measurement of the underlying assets and liabilities. Cash flows from such derivatives are classified as operating activities. The Company uses interest rate swaps to convert certain of our fixed interest rate notes to floating interest rates based on the London InterBank Offered Rate (LIBOR). All interest rate swaps will expire within eight years. The change in fair value of the derivative instrument substantially offsets the change in the fair value of the hedged item. These derivatives are classified in the Consolidated Statements of Cash Flows in the same section as the underlying item. The Company uses interest rate locks, which fix the benchmark interest rates of future debt issuance. The Company records changes in fair value of interest rate locks in accumulated other comprehensive income (loss) in the consolidated balance sheets, in the period of change. When the forecasted transaction occurs, the Company will start to amortize the accumulated gains or losses included as a component of other comprehensive income (loss) related to the interest rate lock cash flow hedges to interest expense. In the event the underlying forecasted transaction does not occur, or it becomes probable that it will not occur, the gains or losses on the related cash flow hedge from accumulated other comprehensive income (loss) will be reclassified to other income and expense within the income statement. The Company presents its derivative assets and derivative liabilities on a gross basis in the Consolidated Balance Sheets. However, under agreements containing provisions on set-off with certain counterparties, subject to applicable requirements, the Company is allowed to net-settle transactions, with a single net amount payable by one party to the other. The Company is neither required to pledge nor entitled to receive cash collateral related to these derivative transactions. Inventory Inventory consists primarily of component parts to be used in the manufacturing process and finished goods, and is stated at the lower of cost or net realizable value. In addition, the Company purchases and holds inventory to provide adequate component supplies over the life of the underlying products. Cost is computed using standard cost, which approximates actual cost, on a first-in, first-out basis. A charge is recorded to cost of product when inventory is determined to be in excess of anticipated demand or considered obsolete. At the point of loss recognition, a new, lower-cost basis for that inventory is established, and subsequent changes in facts and circumstances do not result in the restoration or increase in the newly established cost basis. Leases The Company determines if an arrangement is a lease at inception. The Company evaluates classification of leases as either operating or finance at commencement and, as necessary, at modification. As of December 31, 2022, the Company did not have any finance leases. Operating leases are included in operating lease right-of-use ("ROU") assets, other accrued liabilities, and operating lease liabilities on the Company's Consolidated Balance Sheets. ROU assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized on the commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments made prior to lease commencement and excludes lease incentives. Variable lease payments not dependent on an index or a rate, are expensed as incurred and are not included within the ROU asset and lease liability calculation. Variable lease payments primarily include reimbursements of costs incurred by lessors for common area maintenance and utilities. The Company's lease terms are the noncancelable period, including any rent-free periods provided by the lessor, and include options to extend or terminate the lease when it is reasonably certain that it will exercise that option. At lease inception, and in subsequent periods as necessary, the Company estimates the lease term based on its assessment of extension and termination options that are reasonably certain to be exercised. Lease costs are recognized on a straight-line basis over the lease term. The Company does not separate non-lease components from lease components for all underlying classes of assets. In addition, the Company does not recognize ROU assets and lease liabilities for short-term leases, which have a lease term of twelve months or less and do not include an option to purchase the underlying asset that the Company is reasonably certain to exercise. Lease cost for short-term leases is recognized on a straight-line basis over the lease term. Property and Equipment Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated using the straight-line method, over the estimated useful lives of the following assets: Estimated Useful Life (years) Computers, equipment, and software 1.5 to 10 Furniture and fixtures 5 to 7 Building and building improvements 7 to 40 Land improvements 10 to 40 Leasehold improvements Lease term, not to exceed 10 years Land is not depreciated. Construction-in-process is related to the construction or development of property and equipment that have not yet been placed in service for their intended use. Business Combinations The purchase price of an acquired entity is allocated to tangible assets, liabilities, and intangible assets, including in-process research and development (IPR&D) based on their estimated fair values with the residual of the purchase price recorded as goodwill. The determination of the value of the intangible assets acquired involves certain estimates, such as expected future cash flows, which include consideration of future growth rates and margins, attrition rates, future changes in technology, discount rates, and the expected use of the acquired assets. These factors are also considered in determining the useful life of the acquired intangible assets. IPR&D is initially capitalized at fair value as an intangible asset with an indefinite life and assessed for impairment thereafter. When an IPR&D project is completed, the IPR&D is reclassed as an amortizable purchased intangible asset and amortized over the asset’s estimated useful life. Acquisition related expenses are recognized separately from business combination and are expensed as incurred. The Company's Consolidated Financial Statements include the operating results of acquired businesses from the date of each acquisition. Goodwill and Intangible Assets Goodwill is tested for impairment annually on November 1 or more frequently if certain circumstances indicate the carrying value of goodwill is impaired. Goodwill is tested for impairment at the reporting unit level. A qualitative assessment is first performed to determine whether it is necessary to quantitatively test goodwill for impairment. This initial assessment includes, among others, consideration of macroeconomic conditions and financial performance. If the qualitative assessment indicates that it is more likely than not that an impairment exists, a quantitative analysis is performed by determining the fair value of the reporting unit using a combination of the discounted cash flow and the market approaches. Goodwill is considered impaired if the carrying value of the reporting unit exceeds its fair value. A goodwill impairment loss is recognized for the amount that the carrying amount of the reporting unit, including goodwill, exceeds its fair value, limited to the total amount of goodwill allocated to that reporting unit. Intangible assets consist of existing technology, customer relationships, and trade name, which are amortized over the period of estimated benefit using the straight-line method and estimated useful lives of 4 or 5 years. Other intangible assets acquired in a business combination related to IPR&D projects are considered to be indefinite-lived until the completion or abandonment of the associated research and development efforts. Indefinite-lived intangibles are not amortized into the results of operations but instead are evaluated for impairment. If and when development is complete, the associated assets would be deemed finite-lived and would be amortized as cost of revenues over their respective estimated useful lives at that point in time. If the research and development project is abandoned, the acquired IPR&D assets are written off and charged to expense in the period of abandonment. Impairment of Long-lived Assets Long-lived assets, such as property, plant, and equipment, ROU assets, and purchased intangible assets subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset, or asset group, to estimated undiscounted future cash flows expected to be generated by the asset, or asset group. An impairment charge is recognized by the amount by which the carrying amount of the asset, or asset group, exceeds its fair value. Warranty Reserves The Company generally offers a one-year warranty or limited life-time warranty on most of its hardware products, and a 90-day warranty on the media that contains the software embedded in the products. Warranty costs are recognized as part of the Company's cost of sales based on associated material costs, logistics costs, labor costs, and overhead at the time revenue is recognized. Material costs are estimated primarily based upon the historical costs to repair or replace product returns within the warranty period. Labor, logistics, and overhead costs are estimated primarily based upon historical trends in the cost to support customer cases within the warranty period. Warranty reserve is reported within other accrued liabilities in the Consolidated Balance Sheets. Contract Manufacturer Liabilities The Company establishes a liability for non-cancelable, non-returnable purchase commitments with its contract manufacturers for carrying charges, quantities in excess of its demand forecasts, or obsolete material charges for components purchased by the contract manufacturers to meet the Company’s demand forecast or customer orders. The demand forecasts are based upon historical trends and analysis from the Company's sales and marketing organizations, adjusted for overall market conditions. Loss Contingencies The Company is subject to the possibility of various loss contingencies arising in the ordinary course of business. Management considers the likelihood of loss related to the occurrence of a liability as well as its ability to reasonably estimate the amount of loss, in determining loss contingencies. An estimated loss contingency is accrued when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. The Company regularly evaluates current information available to determine whether such accruals should be adjusted and whether new accruals are required. Foreign Currency Assets and liabilities of foreign operations with non-U.S. Dollar functional currency are translated to U.S. Dollars using exchange rates in effect at the end of the period. Revenue and expenses are translated to U.S. Dollars using rates that approximate those in effect during the period. The resulting translation adjustments are included in the Company’s Consolidated Balance Sheets in the stockholders’ equity section as a component of accumulated other comprehensive loss. The Company remeasures monetary assets and monetary liabilities in non-functional currencies and records the resulting foreign exchange transaction gains and losses in other expense, net in the Consolidated Statements of Operations. Revenue Recognition Revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services by following a five-step process, (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price, and (5) recognize revenue when or as the Company satisfies a performance obligation, as further described below. Identify the contract with a customer . The Company generally considers a sales contract and/or agreement with an approved purchase order as a customer contract provided that collection is considered probable, which is assessed based on the creditworthiness of the customer as determined by credit checks, payment histories, and/or other circumstances. The Company combines contracts with a customer if contracts are negotiated with a single commercial substance or contain price dependencies. Identify the performance obligations in the contract . Product performance obligations include hardware, software licenses including perpetual and term-based licenses, and service performance obligations including maintenance services, Software-as-a-Service ("SaaS"), education and training, and professional services. Determine the transaction price . The transaction price for the Company’s contracts with its customers consists of both fixed and variable consideration, provided it is probable that a significant reversal of revenue will not occur when the uncertainty related to variable consideration is resolved. Fixed consideration includes amounts to be contractually billed to the customer while variable consideration includes estimates for rights of return, rebates, and price protection, which are based on historical sales returns and price protection credits, specific criteria outlined in rebate agreements, and other factors known at the time. The Company generally invoices customers for hardware, software licenses and related maintenance arrangements at time of delivery, and professional services either upfront or upon meeting certain milestones. Customer invoices are generally due within 30 to 90 days after issuance. The Company’s contracts with customers typically do not include significant financing components as the period between the transfer of performance obligations and timing of payment are generally within one year. Allocate the transaction price to the performance obligations in the contract . For contracts that contain multiple performance obligations, the Company allocates the transaction price to the performance obligations on a relative stand-alone selling price ("SSP") basis. SSP is based on multiple factors including, but not limited to historical discounting trends for products and services, pricing practices in different geographies and through different sales channels, gross margin objectives, internal costs, competitor pricing strategies, and industry technology lifecycles. Recognize revenue when or as the Company satisfies a performance obligation . Revenue for hardware and certain software licenses, are recognized at a point in time, which is generally upon shipment or delivery. Certain software licenses are recognized on a ratable basis over the term of the license. Revenue for maintenance services and SaaS is recognized on a ratable basis over the contract term. Revenue from education, training, and professional services is recognized as services are completed or ratably over the contractual period of generally one year or less. Deferred product revenue represents unrecognized revenue related to undelivered product commitments and other shipments that have not met revenue recognition criteria. Deferred service revenue represents billed amounts for service contracts, which include technical support, hardware and software maintenance, professional services, SaaS, and education and training, for which services have not been rendered. Revenue is recognized net of any taxes collected, which are subsequently remitted to governmental authorities. Deferred Commissions Sales commissions earned by the Company’s sales force are considered incremental and recoverable costs of obtaining a contract with a customer. These costs are recorded as prepaid expenses or other long-term assets and are deferred and then amortized over a period of benefit which is typically over the term of the customer contracts. Amortization expense is included in sales and marketing expenses in the accompanying Consolidated Statements of Operations. Research and Development Costs to research, design, and develop the Company's products are expensed as incurred. Software Development Costs Capitalization of software development costs for software to be sold, leased, or otherwise marketed begins when a product's technological feasibility has been established and ends when a product is available for general release to customers. Generally, the Company's products are released soon after technological feasibility has been established. As a result, costs incurred between achieving technological feasibility and product general availability have not been significant. The Company capitalizes costs associated with internal-use software systems during the application development stage. Such capitalized costs include external direct costs incurred in developing or obtaining the applications and payroll and payroll-related costs for employees, who are directly associated with the development of the applications. Advertising Advertising costs are charged to sales and marketing expense as incurred. Costs to produce advertising were approximately $7.4 million for 2022 and 2021 and $4.0 million for 2020. Costs to communicate advertising totaled approximately $30.0 million, $26.6 million, and $21.7 million, for 2022, 2021, and 2020, respectively. Share-Based Compensation The Company measures and recognizes compensation cost for all share-based awards made to employees and directors, including employee stock options, restricted stock awards ("RSAs"), restricted stock units ("RSUs"), performance share awards ("PSAs") and employee stock purchases related to the Employee Stock Purchase Plan ("ESPP"). For service condition only awards, share-based compensation expense is based on the fair value of the underlying awards and amortized on a straight-line basis. For PSAs, share-based compensation expense is amortized on a straight-line basis for each separate vesting portion of the awards. The Company accounts for forfeitures as they occur. The Company utilizes the Black-Scholes-Merton (“BSM”) option-pricing model to estimate the fair value of its ESPP purchase rights. The BSM model requires various highly subjective assumptions that represent management's best estimates of volatility, risk-free interest rate, expected life, and dividend yield. The Company estimates expected volatility based on the implied volatility of market-traded options, on the Company's common stock, adjusted for other relevant factors including historical volatility of the Company’s common stock over the most recent period commensurate with the estimated expected life of the Company’s ESPP. The expected life of ESPP purchase rights approximates the offering period. The Company determines the grant date fair value of its RSUs, RSAs, and PSAs based on the closing market price of the Company’s common stock on the date of grant, adjusted by the present value of the dividends expected to be paid on the underlying shares of common stock during the requisite and derived service period as these awards are not entitled to receive dividends until vested. For market-based RSUs, the Company estimates the fair value and derived service period using the Monte Carlo simulation option pricing model ("Monte Carlo model"). The determination of the grant date fair value and derived service periods using the Monte Carlo model is affected by the Company's stock price, comparative market-based returns, as well as various highly subjective assumptions that represent management's best estimates of volatility, risk-free interest rate, and dividend yield. The Company estimates expected volatility based on the implied volatility of market-traded options, on the Company's common stock, adjusted for other relevant factors, including historical volatility of the Company’s common stock over the contractual life of the Company's market-based RSUs. Provision for Income Taxes Deferred tax assets and liabilities are recognized for the expected tax consequences of temporary differences between the tax basis of assets and liabilities and their reported amounts. Valuation allowances are recorded to reduce deferred tax assets to the amount that will more likely than not be realized. The Company accounts for uncertainty in income taxes using a two-step approach to recognize and measure uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon

Divestiture

Divestiture	12 Months Ended
	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Divestiture	Note 2. Divestiture On April 4, 2022, Synopsys, Inc ("Synopsys") purchased Juniper's silicon photonics business and formed a new entity called OpenLight Photonics, Inc. ("OpenLight"). The Company received cash consideration of $90.0 million and retained a 25% equity interest in the new entity. The agreements with Synopsys contain redemption options with respect to Juniper's equity interest in OpenLight, which are exercisable either by (i) Juniper on or after the third anniversary of the acquisition or sooner in certain circumstances, or (ii) Synopsys on or after the third anniversary of the acquisition. Juniper can exercise its put option at the greater of fair value at the time of redemption or $30.0 million, and the option was assigned a value of $10.8 million . The divestiture did not represent a strategic shift with a major effect on the Company’s operations and financial results, and therefore, did not qualify as a discontinued operation. The Company recognized a gain on divestiture of $45.8 million and the portion of gain related to the remeasurement of retained investment was $19.5 million. The following table presents the carrying value of the major components of assets and liabilities derecognized as of April 4, 2022 (in millions): As of April 4, Assets: Total current assets $ 1.0 Property and equipment, net 3.6 Deferred tax assets 3.9 Other long-term assets 1.1 Purchased intangible assets, net 49.0 Goodwill 28.9 Total assets held for sale $ 87.5 Liabilities: Accounts payable $ 1.4 Other liabilities 1.1 Total liabilities held for sale $ 2.5 The Company's 25% equity interest in OpenLight is accounted for under the equity method of accounting. The investment was recognized at fair value in other long-term assets within the consolidated balance sheet at an aggregate amount of $40.8 million. The fair value was determined based on the price paid by Synopsys for its 75% equity interest in OpenLight along with the value of the redemption options.

Cash Equivalents and Investment

Cash Equivalents and Investments	12 Months Ended
	Dec. 31, 2022
Cash Equivalents and Investments [Abstract]
Cash Equivalents and Investments	Note 3. Cash Equivalents and Investments Investments in Available-for-Sale Debt Securities The following table summarizes the Company's unrealized gains and losses and fair value of investments designated as available-for-sale debt securities as of December 31, 2022 and December 31, 2021 (in millions): As of December 31, 2022 As of December 31, 2021 Amortized Gross Unrealized Gross Unrealized Estimated Fair Amortized Gross Unrealized Gross Unrealized Estimated Fair Fixed income securities: Asset-backed and mortgage-backed securities $ 37.8 $ — $ (1.2) $ 36.6 $ 139.1 $ — $ (0.5) $ 138.6 Certificates of deposit — — — — 5.0 — — 5.0 Commercial paper — — — — 75.8 — — 75.8 Corporate debt securities 277.5 — (7.1) 270.4 443.3 0.7 (1.5) 442.5 Foreign government debt securities 8.8 — (0.4) 8.4 12.8 — (0.1) 12.7 Time deposits 70.6 — — 70.6 35.2 — — 35.2 U.S. government agency securities 18.6 — (0.6) 18.0 26.8 — (0.1) 26.7 U.S. government securities 9.0 — (0.2) 8.8 73.5 0.1 — 73.6 Total fixed income securities 422.3 — (9.5) 412.8 811.5 0.8 (2.2) 810.1 Privately-held debt and redeemable preferred stock securities 15.5 37.4 — 52.9 9.6 37.4 — 47.0 Total available-for-sale debt securities $ 437.8 $ 37.4 $ (9.5) $ 465.7 $ 821.1 $ 38.2 $ (2.2) $ 857.1 Reported as: Cash equivalents $ 70.6 $ — $ — $ 70.6 $ 47.2 $ — $ — $ 47.2 Short-term investments 205.9 — (3.3) 202.6 306.8 0.7 (0.1) 307.4 Long-term investments 145.8 — (6.2) 139.6 457.5 0.1 (2.1) 455.5 Other long-term assets 15.5 37.4 — 52.9 9.6 37.4 — 47.0 Total $ 437.8 $ 37.4 $ (9.5) $ 465.7 $ 821.1 $ 38.2 $ (2.2) $ 857.1 The following table presents the contractual maturities of the Company's total fixed income securities as of December 31, 2022 (in millions): Amortized Estimated Fair Due in less than one year $ 276.5 $ 273.2 Due between one and five years 145.8 139.6 Total $ 422.3 $ 412.8 As of December 31, 2022, the Company's unrea lized loss of $9.5 million resulted from 303 investments, of which loss aggregating $0.8 million was from investments in an unrealized loss position for less than 12 months, and $8.7 million was from investments in an unrealized loss position for more than 12 months. The gross unrealized losses related to these investments were primarily due to changes in market interest rates. The Company anticipates that it will recover the entire amortized cost basis of such available-for-sale debt securities and has determined tha t no allowance for credit losses was required to be recognized during the years ended December 31, 2022 and December 31, 2021. During the years ended December 31, 2022 and December 31, 2020, the Company had no material gross realized gains or losses from available-for-sale debt securities. During the year ended December 31, 2021, the Company had gross realized gains of $15.3 million and no material gross realized losses from available-for-sale debt securities. Investments in Equity Securities The following table presents the Company's investments in equity securities as of December 31, 2022 and 2021 (in millions): As of December 31, 2022 2021 Equity investments with readily determinable fair value Money market funds $ 420.8 $ 382.0 Mutual funds 28.1 33.4 Publicly-traded equity securities 7.7 8.1 Equity investments without readily determinable fair value 137.7 150.1 Equity investment under the equity method of accounting 36.0 — Total equity securities $ 630.3 $ 573.6 Reported as: Cash equivalents $ 420.8 $ 371.5 Short-term investments 7.7 8.1 Prepaid expenses and other current assets 2.4 15.1 Other long-term assets 199.4 178.9 Total $ 630.3 $ 573.6 During the years ended December 31, 2022, 2021, and 2020, there were no material unrealized gains or losses recognized for equity investments with readily determinable fair value or equity investments without readily determinable fair value. During the year ended December 31, 2022, the loss recognized from the equity method investment was $4.8 million. Restricted Cash and Investments The Company has restricted cash and investments for: (i) amounts under the Company's non-qualified deferred compensation plan for senior-level employees; (ii) amounts held under the Company's short-term disability plan in California; and (iii) amounts held in escrow accounts, as required in connection with certain acquisitions. Restricted investments consist of equity investments. As of December 31, 2022, the carrying value of restricted cash and investments was $45.6 million, of which $17.5 million was included in prepaid expenses and other current assets and $28.1 million was included in other long-term assets on the Consolidated Balance Sheets. The following table provides a reconciliation of cash, cash equivalents, and restricted cash included in the Consolidated Balance Sheets as of December 31, 2022 and December 31, 2021 (in millions): As of December 31, 2022 2021 Cash and cash equivalents $ 880.1 $ 922.5 Restricted cash included in Prepaid expenses and other current assets 15.2 17.2 Restricted cash included in Other long-term assets 2.4 3.0 Total cash, cash equivalents, and restricted cash $ 897.7 $ 942.7

Fair Value Measurements

Fair Value Measurements	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Fair Value Measurements	Note 4. Fair Value Measurements Assets and Liabilities Measured at Fair Value on a Recurring Basis The following table provides a summary of assets and liabilities measured at fair value on a recurring basis and as reported in the Consolidated Balance Sheets (in millions): Fair Value Measurements at December 31, 2022 Fair Value Measurements at December 31, 2021 Quoted Prices in Significant Other Significant Other Total Quoted Prices in Significant Other Significant Other Total Assets: Available-for-sale debt securities: Asset-backed and mortgage-backed securities $ — $ 36.6 $ — $ 36.6 $ — $ 138.6 $ — $ 138.6 Certificates of deposit — — — — — 5.0 — 5.0 Commercial paper — — — — — 75.8 — 75.8 Corporate debt securities — 270.4 — 270.4 — 442.5 — 442.5 Foreign government debt securities — 8.4 — 8.4 — 12.7 — 12.7 Time deposits — 70.6 — 70.6 — 35.2 — 35.2 U.S. government agency securities — 18.0 — 18.0 — 26.7 — 26.7 U.S. government securities 8.8 — — 8.8 42.3 31.3 — 73.6 Privately-held debt and redeemable preferred stock securities — — 52.9 52.9 — — 47.0 47.0 Total available-for-sale debt securities 8.8 404.0 52.9 465.7 42.3 767.8 47.0 857.1 Equity securities: Money market funds 420.8 — — 420.8 382.0 — — 382.0 Mutual funds 28.1 — — 28.1 33.4 — — 33.4 Publicly-traded equity securities 7.7 — — 7.7 8.1 — — 8.1 Total equity securities 456.6 — — 456.6 423.5 — — 423.5 Derivative assets: Foreign exchange contracts — 1.3 — 1.3 — 9.2 — 9.2 Interest rate contracts — 125.4 — 125.4 — 47.1 — 47.1 Total derivative assets — 126.7 — 126.7 — 56.3 — 56.3 Total assets measured at fair value on a recurring basis $ 465.4 $ 530.7 $ 52.9 $ 1,049.0 $ 465.8 $ 824.1 $ 47.0 $ 1,336.9 Liabilities: Derivative liabilities: Foreign exchange contracts $ — $ (37.6) $ — $ (37.6) $ — $ (24.0) $ — $ (24.0) Interest rate contracts — (87.4) — (87.4) — (2.5) — (2.5) Total derivative liabilities — (125.0) — (125.0) — (26.5) — (26.5) Total liabilities measured at fair value on a recurring basis $ — $ (125.0) $ — $ (125.0) $ — $ (26.5) $ — $ (26.5) Total assets, reported as: Cash equivalents $ 420.8 $ 70.6 $ — $ 491.4 $ 371.6 $ 47.2 $ — $ 418.8 Short-term investments 14.6 195.7 — 210.3 41.5 274.0 — 315.5 Long-term investments 1.9 137.7 — 139.6 8.8 446.7 — 455.5 Prepaid expenses and other current assets 2.4 0.8 — 3.2 15.1 8.8 — 23.9 Other long-term assets 25.7 125.9 52.9 204.5 28.8 47.4 47.0 123.2 Total assets measured at fair value on a recurring basis $ 465.4 $ 530.7 $ 52.9 $ 1,049.0 $ 465.8 $ 824.1 $ 47.0 $ 1,336.9 Fair Value Measurements at December 31, 2022 Fair Value Measurements at December 31, 2021 Quoted Prices in Significant Other Significant Other Total Quoted Prices in Significant Other Significant Other Total Total liabilities, reported as: Other accrued liabilities $ — $ (32.5) $ — $ (32.5) $ — $ (14.9) $ — $ (14.9) Other long-term liabilities — (92.5) — (92.5) — (11.6) — (11.6) Total liabilities measured at fair value on a recurring basis $ — $ (125.0) $ — $ (125.0) $ — $ (26.5) $ — $ (26.5) The Company's Level 2 available-for-sale debt securities are priced using quoted market prices for similar instruments or non-binding market prices that are corroborated by observable market data. The Company uses inputs such as actual trade data, benchmark yields, broker/dealer quotes, or alternative pricing sources with reasonable levels of price transparency which are obtained from quoted market prices, independent pricing vendors, or other sources, to determine the ultimate fair value of these assets. The Company's derivative instruments are classified as Level 2, as they are not actively traded and are valued using pricing models that use observable market inputs. During the years ended December 31, 2022 and 2021, the Company had no transfers into or out of Level 3 of the fair value hierarchy of its assets or liabilities measured at fair value. The Company's privately-held debt and redeemable preferred stock securities are classified as Level 3 assets due to the lack of observable inputs to determine fair value. The Company estimates the fair value of its privately-held debt and redeemable preferred stock securities on a recurring basis using an analysis of the financial condition and near-term prospects of the investee, including recent valuations at the time of financing activities and the investee's capital structure. During the year ended December 31, 2022, the Company had no material realized gains or losses from the disposal of securities related to privately-held debt and redeemable preferred stock securities. Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis The Company's investments in equity securities without readily determinable fair value are classified as Level 3 assets due to the lack of observable inputs to determine fair value. The Company estimates the fair value of equity securities without readily determinable fair value and investments accounted for under the equity method of accounting, on a nonrecurring basis using an analysis of the financial condition and near-term prospects of the investee, including recent financing activities and the investee's capital structure. As of December 31, 2022 and 2021, there have been no material upward or downward adjustments for price changes to the equity securities without readily determinable fair value. Certain of the Company's assets, including intangible assets and goodwill, are measured at fair value on a nonrecurring basis. There were no significant impairment charges recognized during the years ended December 31, 2022, 2021, and 2020. As of December 31, 2022 and 2021, the Company had no liabilities required to be measured at fair value on a nonrecurring basis. Assets and Liabilities Not Measured at Fair Value The carrying amounts of the Company's accounts receivable, accounts payable, and other accrued liabilities approximate fair value due to their short maturities. As of December 31, 2022 and December 31, 2021, the estimated fair value of the Company's total outstanding debt in the Consolidated Balance Sheets was $1,485.6 million

Derivative Instruments

Derivative Instruments	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Note 5. Derivative Instruments The notional amount of the Company's derivative instruments is summarized as follows (in millions): As of December 31, 2022 2021 Designated derivatives: Cash flow hedges: Foreign currency contracts $ 775.9 $ 873.9 Interest rate lock contracts 650.0 650.0 Fair value hedges: Interest rate swap contracts 600.0 600.0 Total designated derivatives $ 2,025.9 $ 2,123.9 Non-designated derivatives 163.5 144.6 Total $ 2,189.4 $ 2,268.5 The fair value of derivative instruments on the Consolidated Balance Sheets was as follows: As of December 31, Balance Sheet Location 2022 2021 Derivative assets: Derivatives designated as hedging instruments: Foreign currency contracts as cash flow hedges Other current assets $ 0.7 $ 8.7 Foreign currency contracts as cash flow hedges Other long-term assets 0.5 0.4 Interest rate lock contracts Other long-term assets 125.4 45.0 Interest rate swap contracts Other long-term assets — 2.1 Total derivatives designated as hedging instruments $ 126.6 $ 56.2 Derivatives not designated as hedging instruments Other current assets 0.1 0.1 Total derivative assets $ 126.7 $ 56.3 Derivative liabilities: Derivatives designated as hedging instruments: Foreign currency contracts Other accrued liabilities $ 32.3 $ 14.8 Foreign currency contracts Other long-term liabilities 5.1 9.1 Interest rate swap contracts Other long-term liabilities 87.4 2.5 Total derivatives designated as hedging instruments $ 124.8 $ 26.4 Derivatives not designated as hedging instruments Other accrued liabilities 0.2 0.1 Total derivative liabilities $ 125.0 $ 26.5 Offsetting of Derivative Instruments The Company presents its derivative instruments at gross fair values in the Consolidated Balance Sheets. As of December 31, 2022 and December 31, 2021 the potential effects of set-off associated with the derivative contracts would be a reduction to both derivative assets and derivative liabilities b y $73.8 million and $17.5 million , respectively. Designated Derivatives The Company uses foreign currency forward contracts or options contracts to hedge the Company's planned cost of revenues and operating expenses denominated in foreign currencies. These derivatives are designated as cash flow hedges and typically have maturities of thirty-six months or less. The Company enters into interest rate swaps, designated as fair value hedges, to convert the fixed interest rates of certain Senior Notes ("Notes") to floating interest rates. In April 2021, the Company entered into swaps for an aggregate notional amount of $300.0 million for its fixed-rate Notes maturing in December 2030 in addition to the swaps entered in 2019 for an aggregate notional amount of $300.0 million for its fixed-rate Notes maturing in March 2041. The interest rate swaps will expire within eight years. In 2020, the Company entered into interest rate locks with large financial institutions, which fix the benchmark interest rates of future debt issuances for an aggregate notional amount of $650.0 million. These contracts are designated as cash flow hedges and are expected to terminate within three years . Effect of Derivative Instruments on the Consolidated Statements of Operations For cash flow hedges, the Company recognized an unrealized gain of $33.1 million , unrealized loss of $9.1 million and unrealized gain of $63.5 million in accumulated other comprehensive loss for the effective portion of its derivative instruments during the years ended December 31, 2022, 2021, and 2020, respectively. For foreign currency contracts, the Company reclassified a loss of $25.8 million, a gain of $28.9 million and a loss of $9.0 million out of accumulated other comprehensive loss to cost of revenues and operating expenses in the Consolidated Statements of Operations during the years ended December 31, 2022, 2021, and 2020, respectively. As of December 31, 2022, an estimated $31.7 million of unrealized net loss within accumulated other comprehensive loss is expected to be reclassified into earnings within the next twelve months. Non-Designated Derivatives The Company also uses foreign currency forward contracts to mitigate variability in gains and losses generated from the remeasurement of certain monetary assets and liabilities denominated in foreign currencies. These foreign exchange forward contracts typically have maturities of approximately one The outstanding non-designated derivative instruments are carried at fair value. Changes in the fair value of these derivatives, which were recorded in Other expense, net within the Consolidated Statements of Operations were not material during the years ended December 31, 2022, 2021, and 2020, respectively. See Note 1, Description of Business, Basis of Presentation and Significant Accounting Policies, for the Company’s policy regarding the offsetting of derivative assets and derivative liabilities.

Goodwill and Purchased Intangib

Goodwill and Purchased Intangible Assets	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and Purchased Intangible Assets	Note 6. Goodwill and Purchased Intangible Assets Goodwill The Company's goodwill activity was as follows (in millions): Total December 31, 2020 $ 3,669.6 Additions due to business combinations 92.5 December 31, 2021 3,762.1 Other (*) (27.7) December 31, 2022 $ 3,734.4 ______________________ (*) Other primarily consists of $28.9 million reduction in goodwill due to the divestiture of the Company's silicon photonics business. See Note 2, Divestiture , for further discussion. We conducted our annual impairment test of goodwill during the fourth quarter of 2022; the estimated fair value of our reporting unit was substantially in excess of the carrying value. There was no goodwill impairment during the years ended December 31, 2022, 2021, and 2020. Purchased Intangible Assets The Company’s purchased intangible assets, net, were as follows (in millions): As of December 31, 2022 As of December 31, 2021 Gross Accumulated Accumulated Impairments and Net Gross Accumulated Accumulated Impairments and Net Finite-lived intangible assets: Technologies and patents $ 913.1 $ (721.3) $ (55.1) $ 136.7 $ 913.1 $ (660.7) $ (55.1) $ 197.3 Customer contracts, support agreements, and related relationships 136.3 (111.2) (2.8) 22.3 136.3 (98.6) (2.8) 34.9 Trade names and other 9.6 (8.1) — 1.5 9.6 (6.5) — 3.1 Total 1,059.0 (840.6) (57.9) 160.5 1,059.0 (765.8) (57.9) 235.3 Indefinite-lived intangible assets: IPR&D — — — — 49.0 — — 49.0 Total purchased intangible assets $ 1,059.0 $ (840.6) $ (57.9) $ 160.5 $ 1,108.0 $ (765.8) $ (57.9) $ 284.3 Amortization expense related to purchased intangible assets with finite lives was $74.8 million, $79.5 million, and $40.6 million for the years ended December 31, 2022, 2021, and 2020, respectively. There were no significant impairment charges related to purchased intangible assets during the years ended December 31, 2022, 2021, and 2020. In 2022, $49.0 million of IPR&D was derecognized due to the divestiture of the Company's silicon photonics business. See Note 2, Divestiture , for further discussion. As of December 31, 2022, the estimated future amortization expense of purchased intangible assets with finite lives was as follows (in millions): Years Ending December 31, Amount 2023 $ 68.8 2024 49.2 2025 39.6 2026 2.9 2027 — Total $ 160.5

Other Financial Information

Other Financial Information	12 Months Ended
	Dec. 31, 2022
Other Financial Information [Abstract]
Other Financial Information	Note 7. Other Financial Information Total Inventory Total inventory consisted of the following (in millions): As of December 31, 2022 2021 Production and service materials $ 479.6 $ 208.6 Finished goods 163.3 75.6 Total inventory $ 642.9 $ 284.2 Reported as: Inventory $ 619.4 $ 272.6 Other long-term assets 23.5 11.6 Total inventory $ 642.9 $ 284.2 Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consisted of the following (in millions): As of December 31, 2022 2021 Contract manufacturer deposits $ 434.7 $ 223.8 Prepaid expenses 104.3 104.3 Other current assets 141.0 123.5 Total prepaid expenses and other current assets $ 680.0 $ 451.6 Property and Equipment, Net Property and equipment, net, consisted of the following (in millions): As of December 31, 2022 2021 Computers and equipment $ 940.0 $ 1,023.5 Software 220.3 226.8 Leasehold improvements 189.2 197.6 Furniture and fixtures 45.4 46.8 Building and building improvements 271.9 269.3 Land and land improvements 243.6 243.5 Construction-in-process 12.1 11.2 Property and equipment, gross 1,922.5 2,018.7 Accumulated depreciation (1,255.7) (1,315.7) Property and equipment, net $ 666.8 $ 703.0 Depreciation expense was $137.7 million, $151.0 million, and $166.2 million in 2022, 2021, and 2020, respectively. Warranties Changes in the Company’s warranty reserve were as follows (in millions): As of December 31, 2022 2021 Beginning balance $ 33.0 $ 30.2 Provisions made during the period, net 30.1 39.5 Actual costs incurred during the period (33.6) (36.7) Ending balance $ 29.5 $ 33.0 Deferred Revenue Details of the Company's deferred revenue, as reported in the Consolidated Balance Sheets, were as follows (in millions): As of December 31, 2022 2021 Deferred product revenue, net $ 108.8 $ 129.1 Deferred service revenue, net 1,554.3 1,284.5 Total $ 1,663.1 $ 1,413.6 Reported as: Current $ 1,020.5 $ 937.9 Long-term 642.6 475.7 Total $ 1,663.1 $ 1,413.6 Revenue See Note 12, Segments, for disaggregated revenue by customer solution, customer vertical, and geographic region. Product revenue of $51.9 million included in deferred revenue at January 1, 2022 was recognized during the year ended December 31, 2022. Service revenue of $808.4 million included in deferred revenue at January 1, 2022 was recognized during the year ended December 31, 2022. Remaining Performance Obligations Remaining Performance Obligations (RPO) are comprised mainly of deferred product and service revenue, and to a lesser extent, unbilled service revenue from non-cancellable contracts for which the Company has not invoiced and has an obligation to perform, and for which revenue has not yet been recognized in the financial statements. The following table summarizes the breakdown of RPO as of December 31, 2022 and when the Company expects to recognize the amounts as revenue (in millions): Revenue Recognition Expected by Period Total Less than 1 year 1-3 years More than 3 years Product $ 114.3 $ 96.9 $ 14.3 $ 3.1 Service 1,563.7 938.3 474.6 150.8 Total $ 1,678.0 $ 1,035.2 $ 488.9 $ 153.9 Deferred Commissions Deferred commissions were $28.2 million and $34.9 million as of December 31, 2022 and 2021, respectively. During the years ended December 31, 2022 and 2021, amortization expense for the deferred commissions were $199.4 million and $189.8 million, respectively, and there were no material impairment charges recognized. Other Expense, Net Other expense, net consisted of the following (in millions): Years Ended December 31, 2022 2021 2020 Interest income $ 19.6 $ 14.9 $ 36.3 Interest expense (58.6) (50.8) (77.0) Gain on investments, net 8.8 17.6 13.3 Other 1.6 1.5 (5.5) Other expense, net $ (28.6) $ (16.8) $ (32.9)

Restructuring Charges

Restructuring Charges	12 Months Ended
	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
Restructuring Charges	Note 8. Restructuring Charges The following table presents restructuring charges included in the Consolidated Statements of Operations (in millions): Years Ended December 31, 2022 2021 2020 Severance $ 12.4 $ 13.6 $ 62.8 Contract terminations and facility exit-related 7.8 29.3 5.2 Total $ 20.2 $ 42.9 $ 68.0 2022 Restructuring Plan In 2022, the Company initiated a restructuring plan (the "2022 Restructuring Plan") designed to enable reinvestment in certain key priority areas to align with strategic changes, which resulted in severance costs from workforce reductions and facility exit-related costs. As of December 31, 2022, activities under the Company's 2022 Restructuring Plan are expected to be substantially completed in the first half of 2023. Prior Restructuring Activities In 2021, the Company initiated a restructuring plan (the "2021 Restructuring Plan") driven by acquisitions and strategic changes and designed to enable reinvestment in certain key priority areas, which resulted in severance, facility consolidations, contract terminations, and other exit related costs. As of December 31, 2022, activities under the Company's 2021 Restructuring Plan have been substantially completed. In 2020, the Company initiated a restructuring plan (the "2020 Restructuring Plan") designed to realign its workforce with the Company's sales strategy, enhance productivity and cost efficiencies, and enable reinvestment in certain key priority areas, which resulted in severance costs from involuntary workforce reduction, as well as a voluntary early retirement program, and other exit related costs, including impairment charges. Restructuring Liabilities Restructuring liabilities are reported within other accrued liabilities in the Consolidated Balance Sheets. The following table provides a summary of changes in the restructuring liabilities associated with the 2022 Restructuring Plan and 2021 Restructuring Plan (in millions): December 31, Charges Cash Other December 31, Severance $ 1.4 $ 12.4 $ (10.9) $ 0.1 $ 3.0 Contract terminations and facility exit-related 10.9 7.8 (13.6) (2.0) 3.1 Total $ 12.3 $ 20.2 $ (24.5) $ (1.9) $ 6.1

Debt and Financing

Debt and Financing	12 Months Ended
	Dec. 31, 2022
Debt Instruments [Abstract]
Debt and Financing	Note 9. Debt and Financing Debt The following table summarizes the Company's total debt (in millions, except percentages): As of December 31, Maturity Date Effective Interest 2022 2021 Senior Notes ("Notes"): 1.200% fixed-rate notes December 2025 1.37 % $ 400.0 $ 400.0 3.750% fixed-rate notes August 2029 3.86 % 500.0 500.0 2.000% fixed-rate notes December 2030 2.12 % 400.0 400.0 5.950% fixed-rate notes March 2041 6.03 % 400.0 400.0 Total Notes 1,700.0 1,700.0 Unaccreted discount and debt issuance costs (11.3) (12.9) Hedge accounting fair value adjustments (*) (87.4) (0.3) Total $ 1,601.3 $ 1,686.8 ________________________________ (*) Represents the fair value adjustments for interest rate swaps with an aggregate notional amount of $600.0 million. These interest rate swaps convert the fixed interest rates of certain Notes to floating interest rates and are designated as fair value hedges. See Note 5, Derivative Instruments , for a discussion of the Company's interest rate swaps. The Notes above are the Company’s senior unsecured and unsubordinated obligations, ranking equally in right of payment to all of the Company’s existing and future senior unsecured and unsubordinated indebtedness, and senior in right of payment to any of the Company’s future indebtedness that is expressly subordinated to the Notes. As of December 31, 2022, the Company's aggregate debt maturities based on outstanding principal were as follows (in millions): Years Ending December 31, Amount 2023 $ — 2024 — 2025 400.0 2026 — 2027 — Thereafter 1,300.0 Total $ 1,700.0 The Company may redeem the Notes, either in whole or in part, at any time at a redemption price equal to the greater of (i) 100% of the aggregate principal amount of the Notes to be redeemed or (ii) the sum of the present values of the remaining scheduled payments discounted to the redemption date, plus, in either case, accrued and unpaid interest, if any. In the event of a change of control repurchase event, the holders of the Notes may require the Company to repurchase for cash all or part of the Notes at a purchase price equal to 101% of the aggregate principal amount, plus accrued and unpaid interest, if any. Interest on the Notes is payable in cash semiannually. The effective interest rates for the Notes include the interest on the Notes, accretion of the discount, and amortization of issuance costs. The indenture and supplemental indentures (together, the "indentures") that govern the Notes also contain various covenants, including limitations on the Company's ability to incur liens or enter into sale-leaseback transactions over certain dollar thresholds. As of December 31, 2022, the Company was in compliance with all covenants in the indentures governing the Notes. Revolving Credit Facility In April 2019, the Company entered into a credit agreement (the "Credit Agreement") with certain institutional lenders that provides for a five-year $500.0 million unsecured revolving credit facility (the "Revolving Credit Facility"), with an option to increase the Revolving Credit Facility by up to an additional $200.0 million, subject to the lenders' approval. Proceeds of loans made under the Revolving Credit Facility may be used by the Company for working capital and general corporate purposes. The Revolving Credit Facility will terminate in April 2024. Borrowings under the Revolving Credit Facility will bear interest, at either (i) a floating rate per annum equal to the base rate plus a margin of between 0.000% and 0.375%, depending on the Company's public debt rating or (ii) a per annum rate equal to the reserve adjusted Eurocurrency rate, plus a margin of between 0.910% and 1.375%, depending on the Company's public debt rating. Base rate is defined as the greatest of (A) Citibank's base rate, (B) the federal funds rate plus 0.500% or (C) the ICE Benchmark Administration Settlement Rate applicable to dollars for a period of one month plus 1.00%. The Eurocurrency rate is determined for U.S. dollars and Pounds Sterling as the rate at which deposits in such currency are offered in the London interbank market for the applicable interest period and for Euro as the rate specified for deposits in Euro with a maturity comparable to the applicable interest period. On December 17, 2021, an amendment to the Credit Agreement was executed that defines the Secured Overnight Financing Rate (SOFR) as the benchmark rate for U.S. dollar borrowings in the absence of LIBOR, and the Sterling Overnight Index Average (SONIA) as the benchmark rate for Pounds Sterling borrowings following the cessation of GBP LIBOR on December 31, 2021. The Revolving Credit Facility requires the Company to maintain a leverage ratio no greater than 3.0x (provided that if a material acquisition has been consummated, the Company is permitted to maintain a leverage ratio no greater than 3.5x for up to four quarters) and an interest coverage ratio no less than 3.0x during the term of the credit facility. As of December 31, 2022, no amounts were outstanding under the Revolving Credit Facility and the Company was in compliance with all covenants in the Credit Agreement. Financing Arrangements The Company provides certain customers with access to extended financing arrangements that allow for longer payment terms than those typically provided by the Company by factoring accounts receivable to third-party financing providers ("financing providers"). The program does not and is not intended to affect the timing of the Company's revenue recognition. Under the financing arrangements, proceeds from the financing providers are due to the Company within 1 to 90 days from the sale of the receivable. In these transactions with the financing providers, the Company surrenders control over the transferred assets. Pursuant to the financing arrangements for the sale of receivables, the Company sold receivables of $50.6 million, $31.9 million and $57.5 million during the years ended December 31, 2022, 2021, and 2020, respectively. The Company received cash proceeds from financing providers of $41.5 million, $32.5 million, and $57.4 million during the years ended December 31, 2022, 2021, and 2020, respectively. As of December 31, 2022 and December 31, 2021, the amounts owed by the financing providers were $11.8 million and $3.2 million, respectively, which were recorded in accounts receivable on the Company’s Consolidated Balance Sheets.

Equity

Equity	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Equity	Note 10. Equity The following table summarizes dividends paid, stock repurchases and retirements under the Company's stock repurchase programs, and stock repurchases for tax withholdings (in millions, except per share amounts): Dividends Stock Repurchases Total Year Per Share Amount Shares Average price (*) Amount Tax Withholding Amount 2022 $ 0.84 $ 270.4 9.2 $ 32.32 $ 299.7 $ 15.4 $ 585.5 2021 $ 0.80 $ 259.1 15.7 $ 27.56 $ 433.3 $ 10.2 $ 702.6 2020 $ 0.80 $ 264.1 17.9 $ 23.47 $ 375.0 $ 6.2 $ 645.3 ________________________________ (*) $23.47 average price per share for 2020 includes $375.0 million in open market purchases, and settlement of the forward contract of $40.0 million under the ASR, which was initiated during the fourth quarter of 2019. Cash Dividends on Shares of Common Stock During 2022, 2021, and 2020, the Company declared and paid quarterly cash dividends of $0.21, $0.20, and $0.20 per common share, totaling $270.4 million, $259.1 million, and $264.1 million, respectively, on its outstanding common stock. Any future dividends, and the establishment of record and payment dates, are subject to approval by the Board of Directors (the "Board") of Juniper or an authorized committee thereof. See Note 16, Subsequent Events, for discussion of the Company's dividend declaration subsequent to December 31, 2022. Stock Repurchase Activities In January 2018, the Board approved a $2.0 billion share repurchase program ("2018 Stock Repurchase Program"). In October 2019, the Board authorized a $1.0 billion increase to the 2018 Stock Repurchase Program for a total of $3.0 billion. During the fiscal year ended December 31, 2022, the Company repurchased 9.2 million shares of its common stock in the open market at an average price of $32.32 per share for an aggregate purchase price of $299.7 million under the 2018 Stock Repurchase Program. As of December 31, 2022, there were $0.6 billion of authorized funds remaining under the 2018 Stock Repurchase Program. See Note 16, Subsequent Events, for a discussion of the Company's stock repurchase activity subsequent to December 31, 2022. Future share repurchases under the 2018 Stock Repurchase Program will be subject to a review of the circumstances at that time and will be made from time to time in private transactions or open market purchases as permitted by securities laws and other legal requirements. In addition to repurchases under the 2018 Stock Repurchase Program, the Company withholds shares of common stock from certain employees in connection with the vesting of stock awards issued to such employees to satisfy applicable tax withholding requirements. Such withheld shares are treated as common stock repurchases in our financial statements as they reduce the number of shares that would have been issued upon vesting. Repurchases associated with tax withholdings were $15.4 million, $10.2 million, and $6.2 million during 2022, 2021, and 2020, respectively. Accumulated Other Comprehensive Income (Loss), Net of Tax The components of accumulated other comprehensive income (loss), net of related taxes, for the years ended December 31, 2022, 2021, and 2020 were as follows (in millions): Unrealized Gains/Losses on Available-for- Sale Debt Securities (1) Unrealized Gains/Losses on Cash Flow Hedges (2) Foreign Total Balance as of December 31, 2019 $ 29.7 $ (4.3) $ (43.9) $ (18.5) Other comprehensive income before reclassifications 5.7 54.4 7.7 67.8 Amount reclassified from accumulated other comprehensive income (loss) (1.3) 7.6 — 6.3 Other comprehensive income, net 4.4 62.0 7.7 74.1 Balance as of December 31, 2020 $ 34.1 $ 57.7 $ (36.2) $ 55.6 Other comprehensive loss before reclassifications (5.0) (13.5) (12.8) (31.3) Amount reclassified from accumulated other comprehensive income (loss) (1.2) (25.2) — (26.4) Other comprehensive loss, net (6.2) (38.7) (12.8) (57.7) Balance as of December 31, 2021 $ 27.9 $ 19.0 $ (49.0) $ (2.1) Other comprehensive (loss) income before reclassifications (6.5) 15.7 (30.1) (20.9) Amount reclassified from accumulated other comprehensive income 0.4 26.8 — 27.2 Other comprehensive (loss) income, net (6.1) 42.5 (30.1) 6.3 Balance as of December 31, 2022 $ 21.8 $ 61.5 $ (79.1) $ 4.2 ________________________________ (1) The reclassifications out of accumulated other comprehensive income (loss) during the years ended December 31, 2022, 2021 , and 2020 for realized gains on available-for-sale debt securities were not material, and were included in other expense, net, in the Consolidated Statements of Operations. (2) The reclassifications out of accumulated other comprehensive income (loss) for realized gains and losses on cash flow hedges was $25.8 million, $28.9 million and $(8.9) million for the year ended December 31, 2022, 2021 and 2020, respectively. The reclassified amounts were included within cost of revenues, research and development, sales and marketing, and general and administrative in the Consolidated Statements of Operations.

Employee Benefit Plans

Employee Benefit Plans	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Employee Benefit Plans	Note 11. Employee Benefit Plans Equity Incentive Plans The Company’s equity incentive plans include the 2015 Equity Incentive Plan (the “2015 Plan”) and the 2008 Employee Stock Purchase Plan (the “ESPP”). The Company has granted RSUs and PSAs under the 2015 Plan and purchase rights under the ESPP. In addition, in connection with certain past acquisitions, the Company has assumed or substituted stock options, RSUs, RSAs, and PSAs granted under the stock plans of the acquired companies. Such awards were converted into or replaced with the Company's stock options, RSUs, RSAs, and PSAs, respectively. The 2015 Plan was adopted and approved by the Company's stockholders in May 2015 and had an initial authorized share reserve of 38.0 million shares of common stock, plus the addition of any shares subject to outstanding awards under the 2006 Equity Incentive Plan and the Amended and Restated 1996 Stock Plan that were outstanding as of May 19, 2015, and that subsequently expire or otherwise terminate, up to a maximum of an additional 29.0 million shares. In May 2017, the Company's stockholders approved an additional 23.0 million shares of common stock for issuance under the 2015 Plan, and in May 2019, the Company's stockholders approved an additional 3.7 million shares of common stock for issuance under the 2015 Plan. As of December 31, 2022, an aggregate of 16.6 million shares were subject to outstanding equity awards and 3.4 million shares were available for future issuance under the 2015 Plan. The ESPP was adopted and approved by the Company's stockholders in May 2008. In May 2020, the Company's stockholders approved an additional 8.0 million shares of common stock for issuance under the ESPP. To date, the Company's stockholders have approved a share reserve of 43.0 million shares of the Company's common stock for issuance under the ESPP. The ESPP permits eligible employees to acquire shares of the Company’s common stock at a 15% discount (as determined in the ESPP) through periodic payroll deductions of up to 10% of base compensation, subject to individual purchase limits of 6,000 shares in any twelve-month period or $25,000 worth of stock, determined at the fair market value of the shares at the time the stock purchase option is granted, in one RSU, RSA, and PSA Activities RSUs generally vest over three years from the date of grant, and RSAs and PSAs generally vest over a period of two The following table summarizes the Company’s RSU, RSA, and PSA activity and related information as of and for the year ended December 31, 2022 (in millions, except per share amounts and years): Outstanding RSUs, RSAs, and PSAs Number of Shares Weighted Average Weighted Average Aggregate Balance at December 31, 2021 22.2 $ 24.55 Granted (1)(2) 9.4 29.62 Vested (3) (8.3) 24.44 Canceled (3.1) 25.76 Balance at December 31, 2022 20.2 $ 26.78 1.2 $ 646.6 As of December 31, 2022 Vested and expected-to-vest RSUs, RSAs, and PSAs 16.6 $ 27.28 1.2 $ 531.5 ________________________________ (1) Includes 7.8 million service-based, 1.2 million performance-based, and 0.4 million market-based awards. The number of shares subject to performance-based and market-based conditions represents the aggregate maximum number of shares that may be issued pursuant to the award over its full term. The grant date fair value of RSUs and PSAs was reduced by the present value of dividends expected to be paid on the underlying shares of common stock during the requisite and derived service period as these awards are not entitled to receive dividends until vested. (2) The weighted-average grant-date fair value of RSUs, RSAs, and PSAs granted and assumed or substituted during 2022, 2021, and 2020 was $29.62, $26.21, and $21.59, respectively. The grant date fair value of RSUs and PSAs was reduced by the present value of dividends expected to be paid on the underlying shares of common stock during the requisite and derived service period as these awards are not entitled to receive dividends until vested. During 2022, the Company declared a quarterly cash dividend of $0.21 per share of common stock on January 27, 2022, April 26, 2022, July 26, 2022, and October 25, 2022. (3) Total fair value of RSUs, RSAs, and PSAs vested during 2022, 2021, and 2020 was $202.2 million, $184.2 million, and $174.7 million, respectively. Shares Available for Grant The following table presents the stock activity and the total number of shares available for grant under the 2015 Plan (in millions): Number of Shares Balance as of December 31, 2021 5.1 Additional shares authorized 4.5 Options, RSUs, and PSAs granted (*) (9.0) RSUs and PSAs canceled (*) 2.8 Balance as of December 31, 2022 3.4 ________________________________ (*) In May 2019, the 2015 Plan was amended, and the amendment removed the fungible share adjustment used to determine shares available for issuance. Under the original terms of the 2015 Plan, RSUs and PSAs with a per share or unit purchase price lower than 100% of the fair market value of the Company's common stock on the day of the grant were counted against shares authorized under the plan as two and one-tenth shares of common stock ("the prior fungible rate") for each share subject to such award. Pursuant to the amendment, beginning on May 14, 2019, each share award granted under the 2015 Plan reduces the share reserve by one share and all share awards granted on May 14, 2019, and thereafter that are later forfeited, canceled or terminated are returned to the share reserve in the same manner. During 2022, among the total 2.8 million of canceled shares, 0.9 million shares represent the shares returned to the share reserve at the prior fungible rate. The number of shares subject to PSAs granted represents the maximum number of shares that may be issued pursuant to the award over its full term. Employee Stock Purchase Plan During 2022, 2021, and 2020, employees purchased 2.6 million, 2.8 million, and 2.7 million shares of common stock through the ESPP at an average exercise price of $21.59, $19.81, and $19.59 per share, respectively. Valuation Assumptions The weighted-average assumptions used and the resulting estimates of fair value for ESPP purchase rights and market-based RSUs were as follows: Years Ended December 31, 2022 2021 2020 ESPP Purchase Rights: Volatility 29% 32% 31% Risk-free interest rate 1.1% 0.1% 0.8% Expected life (years) 1.3 1.3 1.3 Dividend yield 2.5% 3.0% 3.3% Weighted-average fair value per share $8.84 $6.96 $6.34 Market-based RSUs: Volatility 30% 30% 25% Risk-free interest rate 1.7% 0.2% 1.3% Dividend yield 2.5% 3.4% 3.3% Weighted-average fair value per share $47.96 $30.70 $26.32 Share-Based Compensation Expense Share-based compensation expense associated with stock options, RSUs, RSAs, PSAs, and ESPP purchase rights was recorded in the following cost and expense categories in the Company's Consolidated Statements of Operations (in millions): Years Ended December 31, 2022 2021 2020 Cost of revenues - Product $ 5.9 $ 5.3 $ 5.4 Cost of revenues - Service 17.4 18.2 15.8 Research and development 84.0 93.1 78.8 Sales and marketing 59.1 65.9 58.2 General and administrative 42.9 40.1 31.4 Total $ 209.3 $ 222.6 $ 189.6 The following table summarizes share-based compensation expense by award type (in millions): Years Ended December 31, 2022 2021 2020 Stock options $ 5.4 $ 9.3 $ 7.3 RSUs, RSAs, and PSAs 181.9 196.2 162.6 ESPP Purchase Rights 22.0 17.1 19.7 Total $ 209.3 $ 222.6 $ 189.6 For the years ended December 31, 2022, 2021, and 2020, the Company recognized tax benefits on total stock-based compensation expense, which are reflected in the income tax provision in the Consolidated Statements of Operations, of $25.7 million, $28.2 million, and $23.5 million, respectively. For the years ended December 31, 2022, 2021, and 2020, the realized tax benefit related to awards vested or exercised during the period was $38.6 million, $31.7 million, and $21.7 million, respectively. These amounts do not include the indirect effects of stock-based awards, which primarily relate to the research and development tax credit. As of December 31, 2022, the total unrecognized compensation cost related to unvested share-based awards was $362.2 million to be recognized over a weighted-average period of 1.6 years. 401(k) Plan The Company maintains a savings and retirement plan qualified under Section 401(k) of the Internal Revenue Code of 1986, as amended (the "IRC"). Employees meeting the eligibility requirements, as defined under the IRC, may contribute up to the statutory limits each year. The Company currently matches 30% of all eligible employee contributions which vest immediately. The Company’s matching contributions to the plan totaled $23.5 million, $22.3 million, and $22.0 million during 2022, 2021, and 2020, respectively. Deferred Compensation Plan

Segments

Segments	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Segments	Note 12. Segments The Company operates in one reportable segment. The Company's chief executive officer, who is the chief operating decision maker, reviews financial information presented on a consolidated basis for purposes of allocating resources and evaluating financial performance, accompanied by disaggregated information about net revenues by customer solution, customer vertical, and geographic region as presented below. The following table presents net revenues by customer solution (in millions): Years Ended December 31, 2022 2021 2020 Customer Solutions: Automated WAN Solutions $ 1,865.3 $ 1,665.0 $ 1,622.2 Cloud-Ready Data Center 878.9 727.1 677.1 AI-Driven Enterprise 1,026.2 830.4 656.2 Hardware Maintenance and Professional Services 1,530.8 1,512.9 1,489.6 Total $ 5,301.2 $ 4,735.4 $ 4,445.1 The following table presents net revenues by customer vertical (in millions): Years Ended December 31, 2022 2021 2020 Cloud $ 1,393.6 $ 1,228.0 $ 1,081.2 Service Provider 1,891.2 1,839.1 1,761.7 Enterprise 2,016.4 1,668.3 1,602.2 Total $ 5,301.2 $ 4,735.4 $ 4,445.1 The Company attributes revenues to geographic region based on the customer’s shipping address. The following table presents net revenues by geographic region (in millions): Years Ended December 31, 2022 2021 2020 Americas: United States $ 2,931.6 $ 2,426.9 $ 2,233.9 Other 225.2 222.2 211.2 Total Americas 3,156.8 2,649.1 2,445.1 Europe, Middle East, and Africa 1,370.0 1,314.5 1,233.8 Asia Pacific 774.4 771.8 766.2 Total $ 5,301.2 $ 4,735.4 $ 4,445.1 During the years ended December 31, 2022, 2021, and 2020, no customer accounted for greater than 10% of the Company's net revenues. The following table presents geographic information for property and equipment, net (in millions). As of December 31, 2022 2021 United States $ 579.3 $ 623.4 International 87.5 79.6 Property and equipment, net $ 666.8 $ 703.0 The Company tracks assets by physical location. The majority of the Company’s assets, excluding cash and cash equivalents and investments, as of December 31, 2022 and December 31, 2021, were attributable to U.S. operations.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Income Taxes	Note 13. Income Taxes The components of pretax income are summarized as follows (in millions): Years Ended December 31, 2022 2021 2020 Domestic $ 509.5 $ 264.6 $ 204.2 Foreign 26.8 45.5 61.0 Total pretax income $ 536.3 $ 310.1 $ 265.2 The provision (benefit) for income taxes is summarized as follows (in millions): Years Ended December 31, 2022 2021 2020 Current provision (benefit): Federal $ 223.6 $ 63.4 $ 73.4 States 23.9 15.9 20.3 Foreign 36.2 48.2 (21.6) Total current provision (benefit) 283.7 127.5 72.1 Deferred (benefit) provision: Federal (199.3) (54.3) (58.7) States (13.6) (4.1) (6.6) Foreign (10.3) (11.7) 0.6 Total deferred (benefit) provision (223.2) (70.1) (64.7) Total provision for income taxes $ 60.5 $ 57.4 $ 7.4 The provision (benefit) for income taxes differs from the amount computed by applying the federal statutory tax rate of 21% to pretax income for each of the years presented as follows (in millions): Years Ended December 31, 2022 2021 2020 Expected provision at statutory rate $ 112.7 $ 65.1 $ 55.7 State taxes, net of federal benefit 12.0 6.5 8.7 Foreign income at different tax rates (18.1) (0.2) (5.9) R&D tax credits (23.6) (16.6) (16.4) Share-based compensation (7.4) (2.2) 9.0 Non-deductible compensation 4.0 4.2 3.5 Temporary differences not currently benefited — — (0.9) Recognition of previously unrecognized tax benefits (8.1) — (63.7) Cost sharing adjustment - Altera — — 20.1 Other (11.0) 0.6 (2.7) Total provision for income taxes $ 60.5 $ 57.4 $ 7.4 In 2020, the Company recorded a $63.7 million benefit, including interest and penalties, related to a multi-year recognition of previously unrecognized tax benefits and a $20.1 million charge, including interest, for a cumulative impact of cost sharing for share-based compensation described below. On June 7, 2019, the Ninth Circuit Court of Appeals issued an opinion in Altera Corp. v. Commissioner requiring related parties in an intercompany cost-sharing arrangement to share expenses related to share-based compensation. On February 10, 2020, Altera appealed this decision to the U.S. Supreme Court, which on June 22, 2020, declined to review the decision. Based on the Supreme Court's decision, the Company's share-based compensation is subject to cost sharing, and the Company recorded a $20.1 million charge referenced above during the year ended December 31, 2020. Deferred income taxes reflect the net tax effects of tax carry-forward items and temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes. Significant components of the Company's long-term deferred tax assets and deferred tax liabilities are as follows (in millions): As of December 31, 2022 2021 Deferred tax assets: Net operating loss carry-forwards $ 57.2 $ 72.5 Research and other credit carry-forwards 281.3 272.2 Deferred revenue 58.1 47.7 Share-based compensation 17.2 17.9 Capitalized R&D expenditure 293.1 102.0 Reserves and accruals not currently deductible 66.1 61.0 Operating lease liabilities 39.7 45.4 Other 13.2 9.9 Total deferred tax assets 825.9 628.6 Valuation allowance (310.9) (300.9) Deferred tax assets, net of valuation allowance 515.0 327.7 Deferred tax liabilities: Property and equipment basis differences — (1.3) Purchased intangible assets (32.3) (56.5) Unremitted foreign earnings (23.7) (25.5) Net unrealized gain (35.8) (21.0) Operating lease assets (36.1) (39.9) Total deferred tax liabilities (127.9) (144.2) Net deferred tax assets $ 387.1 $ 183.5 As of December 31, 2022 and 2021, the Company had a valuation allowance on its U.S. and foreign deferred tax assets of $310.9 million and $300.9 million, respectively. The balance at December 31, 2022 consisted of $1.7 million, $297.8 million, and $11.5 million against the Company's U.S. federal, state, and foreign deferred tax assets, respectively, which the Company believes are not more likely than not to be utilized in future years. The valuation allowance increased in 2022 and 2021 by $10 million and $39.4 million, respectively, primarily related to the changes in state R&D tax credits. As of December 31, 2022, the Company had federal, California and other states net operating loss carry-forwards of approximately $150.0 million, $129.1 million, and $138.8 million, respectively. The California net operating loss carry-forwards of $129.1 million are expected to expire unused. The Company also had federal, California, and other state tax credit carry-forwards of approximately $2.4 million, $308.6 million, and $34.2 million, respectively. Unused net operating loss and other state tax credit carry-forwards will expire at various dates beginning in the year 2023. The California tax credit carry-forwards will carry forward indefinitely. The Company provides deferred tax liabilities for all tax consequences associated with the undistributed earnings that are expected to be repatriated to subsidiaries' parent unless the subsidiaries' earnings are considered indefinitely reinvested. The Company has made no provision for deferred taxes on approximately $118.1 million of cumulative undistributed earnings of certain foreign subsidiaries through December 31, 2022. These earnings are considered indefinitely invested in operations of the subsidiaries, as the Company intends to utilize these amounts to fund future expansion of its operations. If these earnings were distributed to the parent, the Company would be subject to additional taxes of approximately $23.9 million. As of December 31, 2022, 2021, and 2020, the total amount of gross unrecognized tax benefits was $116.0 million, $113.4 million, and $116.0 million, respectively. As of December 31, 2022, approximately $111.7 million of the $116.0 million gross unrecognized tax benefits, if recognized, would affect the effective tax rate before considering valuation allowance. A reconciliation of the beginning and ending amount of the Company's total gross unrecognized tax benefits was as follows (in millions): Years Ended December 31, 2022 2021 2020 Balance at beginning of year $ 113.4 $ 116.0 $ 151.3 Tax positions related to current year: Additions 5.8 7.7 5.3 Tax positions related to prior years: Additions 6.9 3.3 18.1 Reductions (2.5) (3.6) (52.0) Settlements — (9.4) (1.8) Lapses in statutes of limitations (7.6) (0.6) (4.9) Balance at end of year $ 116.0 $ 113.4 $ 116.0 As of December 31, 2022, 2021, and 2020, the Company had accrued interest and penalties related to unrecognized tax benefits of $5.6 million, $8.1 million, and $5.3 million, respectively, as other long-term liabilities in the Consolidated Balance Sheets. Due to the changes in the level of gross unrecognized tax benefits, the Company recognized a (benefit), or expense, for net interest and penalties of $(2.5) million, $2.7 million, and $(20.7) million in its Consolidated Statements of Operations during the years ended December 31, 2022, 2021, and 2020, respectively. The Company recognizes interest and penalties related to unrecognized tax benefits as a component of income tax expense. The Company engages in continuous discussions and negotiations with tax authorities regarding tax matters in various jurisdictions. There is a greater than remote likelihood that the balance of the gross unrecognized tax benefits will decrease by up to $1.0 million within the next twelve months due to the completion of tax review cycles in various tax jurisdictions and lapses of applicable statutes of limitation. The Company conducts business globally and, as a result, Juniper Networks or one or more of its subsidiaries files income tax returns in the U.S. federal jurisdiction and various state and foreign jurisdictions. In the normal course of business, the Company is subject to examination by taxing authorities throughout the world, including such jurisdictions as the Netherlands, U.K., France, Germany, Japan, China, Australia, India, and the U.S. With few exceptions, the Company is no longer subject to U.S. federal, state and local, and non-U.S. income tax examinations for years before 2012. The Company is currently under examination by the Internal Revenue Service and the India tax authorities for the 2017 through 2018 tax years and the 2012 through 2020 tax years, respectively. The Company regularly assesses the likelihood of an adverse outcome resulting from such examinations. As of December 31, 2022, the Company believes the resolution of the audits is unlikely to have a material effect on its consolidated financial condition or results of operations. The Company is pursuing all available administrative remedies relative to ongoing matters. The Company believes that it has adequately provided for any reasonably foreseeable outcomes related to proposed adjustments and the ultimate resolution of these matters is unlikely to have a material effect on its consolidated financial condition or results of operations; however, there is still a possibility that an adverse outcome of these matters could have a material effect on its consolidated financial condition and results of operations.

Net Income Per Share

Net Income Per Share	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Net Income per Share	Note 14. Net Income per Share The Company computed basic and diluted net income per share as follows (in millions, except per share amounts): Years Ended December 31, 2022 2021 2020 Numerator: Net income $ 471.0 $ 252.7 $ 257.8 Denominator: Weighted-average shares used to compute basic net income per share 322.1 324.4 330.4 Dilutive effect of employee stock awards 7.4 7.2 4.8 Weighted-average shares used to compute diluted net income per share 329.5 331.6 335.2 Net income per share: Basic $ 1.46 $ 0.78 $ 0.78 Diluted $ 1.43 $ 0.76 $ 0.77 Anti-dilutive shares 3.4 0.5 5.3 Basic net income per share is computed using net income available to common stockholders and the weighted-average number of common shares outstanding for the period. Diluted net income per share is computed using net income available to common stockholders and the weighted-average number of common shares outstanding plus potentially dilutive common shares outstanding during the period. Dilutive potential common shares consist of common shares issuable upon exercise of stock options and purchase rights, and vesting of RSUs, RSAs, and PSAs. The Company includes the common shares underlying PSAs in the calculation of diluted net income per share only when they become contingently issuable. Anti-dilutive shares are excluded from the computation of diluted net income per share.

Commitments and Contingencies

Commitments and Contingencies	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Note 15. Commitments and Contingencies Commitments Unconditional purchase obligations consist of agreements that include firm and non-cancelable terms to transfer funds in the future for fixed or minimum amounts or quantities to be purchased at fixed or minimum prices. For obligations with cancellation provisions, the amounts included in the following tables were limited to the non-cancelable portion of the agreement terms or the minimum cancellation fee. Purchase Commitments with Contract Manufacturers and Suppliers In order to reduce manufacturing lead times and in the interest of having access to adequate component supply, the Company enters into agreements with contract manufacturers and certain suppliers to procure inventory based on the Company's requirements. A significant portion of the Company's purchase commitments arising from these agreements consists of firm and non-cancelable commitments. In certain instances, these agreements allow the Company the option to cancel, reschedule, and adjust its requirements based on the Company's business needs prior to firm orders being placed. The following table summarizes the Company’s purchase commitments as of December 31, 2022 (in millions): Years Ending December 31, Purchase Commitments 2023 $ 2,101.1 2024 134.9 2025 75.3 2026 80.0 2027 85.0 Total $ 2,476.3 The Company establishes a liability in connection with purchase commitments related to quantities in excess of its demand forecasts or obsolete materials charges for components purchased by the contract manufacturers based on the Company’s demand forecast or customer orders. As of December 31, 2022, the Company had accrued $21.5 million based on its estimate of such charges. Other Purchase Obligations The following table summarizes the Company’s unconditional purchase obligations other than with contract manufacturers and suppliers as of December 31, 2022 (in millions): Years Ending December 31, Unconditional Purchase Obligations 2023 $ 48.4 2024 36.3 2025 9.7 2026 2.0 2027 0.4 Total $ 96.8 In December 2018, the Company entered into a Master Services Agreement and certain Statements of Work, as subsequently amended (collectively, the “Agreement”), with International Business Machines Corporation ("IBM"). As of December 31, 2022, the Company expects to pay IBM $94.2 million over the remaining initial term of the Agreement. The table above does not include fees payable to IBM under the contract as the Company is unable to make a reasonably reliable estimate of the amount of the payments related to each of the years under this contract due to uncertainties in the usage of the services. Leases The Company leases its facilities and certain equipment under non-cancelable operating leases that have remaining lease terms of 1 to 9 years and 1 to 4 years, respectively. Each leased facility is subject to an individual lease or sublease, which could provide various options to extend or terminate the lease agreement. Facilities are primarily comprised of corporate offices, data centers, and R&D facilities. Equipment includes vehicles and various office equipment. The Company also has variable lease payments that are primarily comprised of common area maintenance and utility charges. The Company's lease agreements do not contain any residual value guarantees or restrictive covenants. The components of lease costs and other information related to leases were as follows (in millions, except years and percentages): Years Ended December 31, 2022 2021 Operating lease cost $ 48.4 $ 57.4 Variable lease cost 10.0 11.5 Total lease cost $ 58.4 $ 68.9 Operating cash outflows from operating leases $ 53.1 $ 57.8 ROU assets obtained in exchange for new operating lease liabilities $ 26.0 $ 29.7 As of December 31, 2022 2021 Weighted average remaining lease term (years) 4.1 4.6 Weighted average discount rate 3.5 % 3.3 % As of December 31, 2022, future operating lease payments for each of the next five years and thereafter are as follows (in millions): Years Ending December 31, Amount 2023 $ 48.7 2024 48.3 2025 39.3 2026 18.5 2027 11.2 Thereafter 11.3 Total lease payments 177.3 Less: interest (12.2) Total $ 165.1 Balance Sheet Information Other accrued liabilities $ 47.4 Long-term operating lease liabilities 117.7 Total (*) $ 165.1 ________________________________ (*) Total lease liabilities as of December 31, 2022 above excluded $83.9 million in legally binding lease payments for a lease signed but not yet commenced. Debt and Interest Payment on Debt As of December 31, 2022, the Company held total outstanding debt consisting of the Notes with a carrying value of $1,601.3 million. See Note 9, Debt and Financing , for further discussion of the Company's long-term debt and expected future principal maturities. Tax Liability Our transition tax liability represents future cash payments on accumulated foreign earnings of subsidiaries as a result of the Tax Cuts and Jobs Act of 2017 ("Tax Act"). The Company has elected to pay its transition tax, net of applicable tax refunds, over the eight-year period provided in the Tax Act. The remaining balance of the Company's transition tax obligation was $250.6 million, of which $198.4 million remains in long-term income taxes payable as of December 31, 2022. As of December 31, 2022, the Company also had $81.0 million included in long-term income taxes payable on the Consolidated Balance Sheets for unrecognized tax positions. At this time, the Company is unable to make a reasonably reliable estimate of the timing of payments related to this amount due to uncertainties in the timing of tax audit outcomes. Guarantees The Company enters into agreements with customers that contain indemnification provisions relating to potential situations where claims could be alleged that the Company’s products solely, or in combination with other third-party products, infringe the intellectual property rights of a third-party. As of December 31, 2022 and 2021, the Company recorded $0.7 million and $1.9 million, respectively, for such indemnification obligations in other accrued liabilities and other long-term liabilities on the Consolidated Balance Sheets. The Company also has financial guarantees consisting of third-party financing arrangements extended to end-user customers and standby letters of credit for certain lease facilities, insurance programs and customs of $27.4 million and $2.4 million, as of December 31, 2022 and December 31, 2021, respectively. Legal Proceedings The Company is involved in investigations, disputes, litigation, and legal proceedings. The Company records an accrual for loss contingencies for legal proceedings when it believes that an unfavorable outcome is both (a) probable and (b) the amount or range of any possible loss is reasonably estimable. The Company intends to aggressively defend itself in these matters, and while there can be no assurances and the outcome of these matters is currently not determinable, the Company currently believes that these existing claims or proceedings are not likely, individually and in the aggregate, to have a material adverse effect on its financial position. Notwithstanding the foregoing, there are many uncertainties associated with any litigation and these matters or other third-party claims against the Company may cause the Company to incur costly litigation and/or substantial settlement charges. In addition, the resolution of any intellectual property litigation may require the Company to make royalty payments, which could adversely affect gross margins in future periods. If any of those events were to occur, the Company's business, financial condition, results of operations, and cash flows could be adversely affected. The actual liability in any such matters may be materially different from the Company's estimates, if any, which could result in the need to adjust the liability and record additional expenses.

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2022
Subsequent Events [Abstract]
Subsequent Events	Note 16. Subsequent Events Dividend Declaration On January 31, 2023, the Company announced a cash dividend of $0.22 per share of common stock to be paid on March 22, 2023 to stockholders of record as of the close of business on March 1, 2023. Stock Repurchase Activities Subsequent to December 31, 2022, through the date of filing of this Report (the "filing date"), the Company repurchased 2.0 million shares of its common stock in the open market, for an aggregate purchase price of $63.0 million at an average price of $30.98 per share, under the 2018 Stock Repurchase Program. Repurchases of approximately 1.4 million shares were settled prior to the filing of this Report and the remaining shares will be settled after the filing date. The Company has an aggregate of $0.5 billion of authorized funds remaining under the 2018 Stock Repurchase Program as of the filing date.

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Account	12 Months Ended
	Dec. 31, 2022
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Account	Juniper Networks, Inc. Schedule II - Valuation and Qualifying Accounts Years Ended December 31, 2022, 2021, and 2020 (In millions) Allowance for Doubtful Accounts Balance at Charged to Write-offs, Balance at 2022 $ 6.7 $ 5.3 $ — $ 12.0 2021 $ 9.9 $ (3.2) $ — $ 6.7 2020 $ 5.5 $ 4.4 $ — $ 9.9 Sales Return Reserve Balance at Provision for Returns / Stock Rotation Returns / Stock Rotation Balance at 2022 $ 31.4 $ 111.9 $ (100.3) $ 43.0 2021 $ 28.4 $ 57.6 $ (54.6) $ 31.4 2020 $ 24.8 $ 60.7 $ (57.1) $ 28.4 All other schedules have been omitted as the required information is not applicable or the information is presented in the Consolidated Financial Statements or notes thereto under Item 8 herein.

Description of Business, Basi_2

Description of Business, Basis of Presentation and Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation
Use of Estimates	Use of Estimates The preparation of the financial statements and related disclosures in accordance with U.S. GAAP requires the Company to make judgments, assumptions, and estimates that affect the amounts reported in the Consolidated Financial Statements and the accompanying notes. The Company bases its estimates and assumptions on current facts, historical experience, and various other factors that it believes are reasonable under the circumstances, to determine the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results could differ from these estimates.
Cash, Cash Equivalents, and Investments	Cash, Cash Equivalents, and Investments Cash and Cash Equivalents Cash and cash equivalents consist of cash on hand, demand deposits with banks, highly liquid investments in money market funds, commercial paper, government securities, certificates of deposits, time deposits, and corporate debt securities, which are readily convertible into cash. All highly liquid investments with original maturities of three months or less from Juniper's purchase date are classified as cash equivalents.
Investments in Available-for-Sale Debt Securities and Equity Securities	Investments in Available-for-Sale Debt Securities The Company's investments in debt securities are classified as available-for-sale and include the Company's fixed income securities and investments in privately-held companies, consisting of debt and redeemable preferred stock securities. Fixed income securities primarily consist of corporate debt securities, U.S. treasury securities, time deposits, asset-backed and mortgage-backed securities, certificate of deposits, commercial paper, U.S. government agency securities, and foreign government debt securities. Fixed income securities are initially recorded at cost and periodically adjusted to fair value in the Consolidated Balance Sheets. The Company periodically evaluates these investments to determine if impairment charges are required. The Company determines whether a credit loss exists for available-for-sale debt securities in an unrealized loss position. When the fair value of a security is below its amortized cost, the amortized cost will be reduced to its fair value and the resulting loss will be recorded in Consolidated Statements of Operations, if it is more likely than not that we are required to sell the impaired security before recovery of its amortized cost basis, or we have the intention to sell the security. If neither of these conditions are met, the Company considers the extent to which the fair value is less than the amortized cost, any changes to the rating of the security by a rating agency, and review of the issuer's financial statements. If factors indicate a credit loss exists, an allowance for credit loss is recorded through other expense, net, limited by the amount that the fair value is less than the amortized cost basis. The Company's privately-held debt and redeemable preferred stock securities are included in other long-term assets in the Consolidated Balance Sheets and are recorded at fair value. In determining the estimated fair value of such securities, the Company utilizes the most recent data available for the investee including known acquisition offers and subsequent funding rounds. The Company periodically evaluates these securities for indicators of impairment, including the inability to recover a portion of or the entire carrying amount of the investment, the inability of the investee to sustain earnings, the reduction in or termination of financial commitment to the investee from other investors, the intention to sell the investment, and whether it is more likely than not that the Company will be required to sell the investment before recovery of the entire amortized cost basis. If the Company determines that the decline in an investment's value indicates credit losses, the difference is recognized as an impairment loss in its Consolidated Statements of Operations. For all available-for-sale debt securities, unrealized gains and the amount of unrealized loss relating to factors other than credit loss are reported as a separate component of accumulated other comprehensive loss in the Consolidated Balance Sheets. Realized gains and losses are determined based on the specific identification method and are reported in the Consolidated Statements of Operations. Investments in Equity Securities The Company's investments in equity securities with readily determinable fair values consist of money market funds, amounts under the non-qualified compensation plan ("NQDC") that are invested in mutual funds, and investments in public companies. These investments are measured at fair value with changes in fair value recognized in the Consolidated Statements of Operations. Equity securities without readily determinable fair values include the Company's investments in privately-held companies consisting of non-redeemable preferred stock and common stock securities. The Company accounts for these securities at cost, adjusted for changes from observable transactions for identical or similar investments of the same issuer, less impairments. Fair value of these equity securities is reassessed when the Company identifies observable price changes indicating that an adjustment upward or downward to the carrying value is necessary. Any observable changes in fair value are recognized in earnings as of the date that the observable transaction took place, rather than the current reporting date. In addition, the Company periodically evaluates equity securities without readily determinable fair values to determine if impairment charges are required by evaluating whether an event or change in circumstance has occurred that may have a significant adverse effect on the fair value of the investment. A qualitative assessment is performed each reporting period to assess whether there are any impairment indicators, including, but not limited to, significant deterioration in the investee's earnings performance; credit rating; asset quality or business prospects; adverse change in the regulatory, economic, or technological environment; change in the general market condition of the geographic area or industry; acquisition offers; and the ability to continue as a going concern. If such indicators are present, the Company estimates the fair value of impaired investments and recognizes an impairment loss in the Consolidated Statement of Operations equal to the difference between the carrying value and fair value. The Company accounts for investments in companies over which it has the ability to exercise significant influence, but does not have control over the investee, under the equity method of accounting. The investment is initially measured at fair value and subsequently adjusted for any impairment, dividend received, plus or minus the Company's proportionate share of the equity method investee's income or loss. The Company records its interest in the net earnings or loss of its equity method investment along with adjustments for unrealized profits or losses on intra-entity transactions, within its Consolidated Statements of Operations. Depending on the timing of such financial statements of the investee, there may be a lag between the timing of such financial statement and the Company's quarter-end date. For the Company's sole equity method investment as of December 31, 2022, the Company's share of the investee's net earnings or loss is recorded two months in arrears. The Company records an impairment when factors indicate that the carrying amount of the investment might not be recoverable.
Fair Value	Fair Value Fair value is defined as the price that would be received upon sale of an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. When determining fair value, the Company considers the principal or most advantageous market in which it transacts, and considers assumptions that market participants would use when pricing the asset or liability. The Company applies the following fair value hierarchy, which prioritizes the inputs used to measure fair value into three levels and bases the categorization within the hierarchy upon the lowest level of input that is available and significant to the fair value measurement: Level 1 – Quoted prices in active markets for identical assets or liabilities. Level 2 – Quoted prices for similar assets and liabilities in active markets or inputs that are observable for the asset or liability, either directly or indirectly through market corroboration, for substantially the full term of the financial instrument. These inputs are valued using market-based approaches. Level 3 – Inputs are unobservable inputs based on the Company’s assumptions. These inputs, if any, are valued using internal financial models.
Derivative Instruments	Derivative Instruments The Company uses derivative instruments, primarily foreign currency forward and interest rate contracts, to hedge certain foreign currency and interest rate exposures. The Company does not enter into derivatives for speculative or trading purposes. The Company uses foreign currency forward contracts or options contracts to hedge certain forecasted foreign currency transactions relating to operating expenses. These derivatives are designated as cash flow hedges, which are carried at fair value with the derivative's gain or loss initially reported as a component of accumulated other comprehensive loss, and upon occurrence of the forecasted transaction, is subsequently reclassified into the costs of services or operating expense line item to which the hedged transaction relates. Cash flows from such hedges are classified as operating activities. The Company also uses foreign currency forward contracts to mitigate variability in gains and losses generated from the re-measurement of certain monetary assets and liabilities denominated in non-functional currencies. These derivatives are carried at fair value with changes recorded in other expense, net in the Consolidated Statements of Operations in the same period as the changes in the fair value from the re-measurement of the underlying assets and liabilities. Cash flows from such derivatives are classified as operating activities. The Company uses interest rate swaps to convert certain of our fixed interest rate notes to floating interest rates based on the London InterBank Offered Rate (LIBOR). All interest rate swaps will expire within eight years. The change in fair value of the derivative instrument substantially offsets the change in the fair value of the hedged item. These derivatives are classified in the Consolidated Statements of Cash Flows in the same section as the underlying item. The Company uses interest rate locks, which fix the benchmark interest rates of future debt issuance. The Company records changes in fair value of interest rate locks in accumulated other comprehensive income (loss) in the consolidated balance sheets, in the period of change. When the forecasted transaction occurs, the Company will start to amortize the accumulated gains or losses included as a component of other comprehensive income (loss) related to the interest rate lock cash flow hedges to interest expense. In the event the underlying forecasted transaction does not occur, or it becomes probable that it will not occur, the gains or losses on the related cash flow hedge from accumulated other comprehensive income (loss) will be reclassified to other income and expense within the income statement. The Company presents its derivative assets and derivative liabilities on a gross basis in the Consolidated Balance Sheets. However, under agreements containing provisions on set-off with certain counterparties, subject to applicable requirements, the Company is allowed to net-settle transactions, with a single net amount payable by one party to the other. The Company is neither required to pledge nor entitled to receive cash collateral related to these derivative transactions.
Inventory	Inventory Inventory consists primarily of component parts to be used in the manufacturing process and finished goods, and is stated at the lower of cost or net realizable value. In addition, the Company purchases and holds inventory to provide adequate component supplies over the life of the underlying products. Cost is computed using standard cost, which approximates actual cost, on a first-in, first-out basis. A charge is recorded to cost of product when inventory is determined to be in excess of anticipated demand or considered obsolete. At the point of loss recognition, a new, lower-cost basis for that inventory is established, and subsequent changes in facts and circumstances do not result in the restoration or increase in the newly established cost basis.
Leases	Leases The Company determines if an arrangement is a lease at inception. The Company evaluates classification of leases as either operating or finance at commencement and, as necessary, at modification. As of December 31, 2022, the Company did not have any finance leases. Operating leases are included in operating lease right-of-use ("ROU") assets, other accrued liabilities, and operating lease liabilities on the Company's Consolidated Balance Sheets. ROU assets represent the Company's right to use an underlying asset for the lease term and lease liabilities represent its obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized on the commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The operating lease ROU asset also includes any lease payments made prior to lease commencement and excludes lease incentives. Variable lease payments not dependent on an index or a rate, are expensed as incurred and are not included within the ROU asset and lease liability calculation. Variable lease payments primarily include reimbursements of costs incurred by lessors for common area maintenance and utilities. The Company's lease terms are the noncancelable period, including any rent-free periods provided by the lessor, and include options to extend or terminate the lease when it is reasonably certain that it will exercise that option. At lease inception, and in subsequent periods as necessary, the Company estimates the lease term based on its assessment of extension and termination options that are reasonably certain to be exercised. Lease costs are recognized on a straight-line basis over the lease term. The Company does not separate non-lease components from lease components for all underlying classes of assets. In addition, the Company does not recognize ROU assets and lease liabilities for short-term leases, which have a lease term of twelve months or less and do not include an option to purchase the underlying asset that the Company is reasonably certain to exercise. Lease cost for short-term leases is recognized on a straight-line basis over the lease term.
Property and Equipment	Property and Equipment Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated using the straight-line method, over the estimated useful lives of the following assets: Estimated Useful Life (years) Computers, equipment, and software 1.5 to 10 Furniture and fixtures 5 to 7 Building and building improvements 7 to 40 Land improvements 10 to 40 Leasehold improvements Lease term, not to exceed 10 years
Business Combinations	Business Combinations The purchase price of an acquired entity is allocated to tangible assets, liabilities, and intangible assets, including in-process research and development (IPR&D) based on their estimated fair values with the residual of the purchase price recorded as goodwill. The determination of the value of the intangible assets acquired involves certain estimates, such as expected future cash flows, which include consideration of future growth rates and margins, attrition rates, future changes in technology, discount rates, and the expected use of the acquired assets. These factors are also considered in determining the useful life of the acquired intangible assets. IPR&D is initially capitalized at fair value as an intangible asset with an indefinite life and assessed for impairment thereafter. When an IPR&D project is completed, the IPR&D is reclassed as an amortizable purchased intangible asset and amortized over the asset’s estimated useful life. Acquisition related expenses are recognized separately from business combination and are expensed as incurred. The Company's Consolidated Financial Statements include the operating results of acquired businesses from the date of each acquisition.
Goodwill and Intangible Assets	Goodwill and Intangible Assets Goodwill is tested for impairment annually on November 1 or more frequently if certain circumstances indicate the carrying value of goodwill is impaired. Goodwill is tested for impairment at the reporting unit level. A qualitative assessment is first performed to determine whether it is necessary to quantitatively test goodwill for impairment. This initial assessment includes, among others, consideration of macroeconomic conditions and financial performance. If the qualitative assessment indicates that it is more likely than not that an impairment exists, a quantitative analysis is performed by determining the fair value of the reporting unit using a combination of the discounted cash flow and the market approaches. Goodwill is considered impaired if the carrying value of the reporting unit exceeds its fair value. A goodwill impairment loss is recognized for the amount that the
Impairment of Long-lived Assets	Impairment of Long-lived Assets Long-lived assets, such as property, plant, and equipment, ROU assets, and purchased intangible assets subject to amortization, are reviewed for impairment whenever events or changes in circumstances indicate that the carrying amount of an asset may not be recoverable. Recoverability of assets to be held and used is measured by a comparison of the carrying amount of an asset, or asset group, to estimated undiscounted future cash flows expected to be generated by the asset, or asset group. An impairment charge is recognized by the amount by which the carrying amount of the asset, or asset group, exceeds its fair value.
Warranty Reserves	Warranty Reserves The Company generally offers a one-year warranty or limited life-time warranty on most of its hardware products, and a 90-day warranty on the media that contains the software embedded in the products. Warranty costs are recognized as part of the Company's cost of sales based on associated material costs, logistics costs, labor costs, and overhead at the time revenue is recognized. Material costs are estimated primarily based upon the historical costs to repair or replace product returns within the warranty period. Labor, logistics, and overhead costs are estimated primarily based upon historical trends in the cost to support customer cases within the warranty period. Warranty reserve is reported within other accrued liabilities in the Consolidated Balance Sheets.
Contract Manufacturer Liabilities	Contract Manufacturer LiabilitiesThe Company establishes a liability for non-cancelable, non-returnable purchase commitments with its contract manufacturers for carrying charges, quantities in excess of its demand forecasts, or obsolete material charges for components purchased by the contract manufacturers to meet the Company’s demand forecast or customer orders. The demand forecasts are based upon historical trends and analysis from the Company's sales and marketing organizations, adjusted for overall market conditions.
Loss Contingencies	Loss ContingenciesThe Company is subject to the possibility of various loss contingencies arising in the ordinary course of business. Management considers the likelihood of loss related to the occurrence of a liability as well as its ability to reasonably estimate the amount of loss, in determining loss contingencies. An estimated loss contingency is accrued when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. The Company regularly evaluates current information available to determine whether such accruals should be adjusted and whether new accruals are required.
Foreign Currency	Foreign Currency Assets and liabilities of foreign operations with non-U.S. Dollar functional currency are translated to U.S. Dollars using exchange rates in effect at the end of the period. Revenue and expenses are translated to U.S. Dollars using rates that approximate those in effect during the period. The resulting translation adjustments are included in the Company’s Consolidated Balance Sheets in the stockholders’ equity section as a component of accumulated other comprehensive loss. The Company remeasures monetary assets and monetary liabilities in non-functional currencies and records the resulting foreign exchange transaction gains and losses in other expense, net in the Consolidated Statements of Operations.
Revenue Recognition	Revenue Recognition Revenue is recognized when promised goods or services are transferred to customers in an amount that reflects the consideration to which the Company expects to be entitled in exchange for those goods or services by following a five-step process, (1) identify the contract with a customer, (2) identify the performance obligations in the contract, (3) determine the transaction price, (4) allocate the transaction price, and (5) recognize revenue when or as the Company satisfies a performance obligation, as further described below. Identify the contract with a customer . The Company generally considers a sales contract and/or agreement with an approved purchase order as a customer contract provided that collection is considered probable, which is assessed based on the creditworthiness of the customer as determined by credit checks, payment histories, and/or other circumstances. The Company combines contracts with a customer if contracts are negotiated with a single commercial substance or contain price dependencies. Identify the performance obligations in the contract . Product performance obligations include hardware, software licenses including perpetual and term-based licenses, and service performance obligations including maintenance services, Software-as-a-Service ("SaaS"), education and training, and professional services. Determine the transaction price . The transaction price for the Company’s contracts with its customers consists of both fixed and variable consideration, provided it is probable that a significant reversal of revenue will not occur when the uncertainty related to variable consideration is resolved. Fixed consideration includes amounts to be contractually billed to the customer while variable consideration includes estimates for rights of return, rebates, and price protection, which are based on historical sales returns and price protection credits, specific criteria outlined in rebate agreements, and other factors known at the time. The Company generally invoices customers for hardware, software licenses and related maintenance arrangements at time of delivery, and professional services either upfront or upon meeting certain milestones. Customer invoices are generally due within 30 to 90 days after issuance. The Company’s contracts with customers typically do not include significant financing components as the period between the transfer of performance obligations and timing of payment are generally within one year. Allocate the transaction price to the performance obligations in the contract . For contracts that contain multiple performance obligations, the Company allocates the transaction price to the performance obligations on a relative stand-alone selling price ("SSP") basis. SSP is based on multiple factors including, but not limited to historical discounting trends for products and services, pricing practices in different geographies and through different sales channels, gross margin objectives, internal costs, competitor pricing strategies, and industry technology lifecycles. Recognize revenue when or as the Company satisfies a performance obligation . Revenue for hardware and certain software licenses, are recognized at a point in time, which is generally upon shipment or delivery. Certain software licenses are recognized on a ratable basis over the term of the license. Revenue for maintenance services and SaaS is recognized on a ratable basis over the contract term. Revenue from education, training, and professional services is recognized as services are completed or ratably over the contractual period of generally one year or less. Deferred product revenue represents unrecognized revenue related to undelivered product commitments and other shipments that have not met revenue recognition criteria. Deferred service revenue represents billed amounts for service contracts, which include technical support, hardware and software maintenance, professional services, SaaS, and education and training, for which services have not been rendered.
Deferred Commissions	Deferred Commissions Sales commissions earned by the Company’s sales force are considered incremental and recoverable costs of obtaining a contract with a customer. These costs are recorded as prepaid expenses or other long-term assets and are deferred and then amortized over a period of benefit which is typically over the term of the customer contracts. Amortization expense is included in sales and marketing expenses in the accompanying Consolidated Statements of Operations.
Research and Development	Research and DevelopmentCosts to research, design, and develop the Company's products are expensed as incurred.
Software Development Costs	Software Development Costs Capitalization of software development costs for software to be sold, leased, or otherwise marketed begins when a product's technological feasibility has been established and ends when a product is available for general release to customers. Generally, the Company's products are released soon after technological feasibility has been established. As a result, costs incurred between achieving technological feasibility and product general availability have not been significant. The Company capitalizes costs associated with internal-use software systems during the application development stage. Such capitalized costs include external direct costs incurred in developing or obtaining the applications and payroll and payroll-related costs for employees, who are directly associated with the development of the applications.
Advertising	AdvertisingAdvertising costs are charged to sales and marketing expense as incurred. Costs to produce advertising were approximately $7.4 million for 2022 and 2021 and $4.0 million for 2020. Costs to communicate advertising totaled approximately
Share-Based Compensation	Share-Based Compensation The Company measures and recognizes compensation cost for all share-based awards made to employees and directors, including employee stock options, restricted stock awards ("RSAs"), restricted stock units ("RSUs"), performance share awards ("PSAs") and employee stock purchases related to the Employee Stock Purchase Plan ("ESPP"). For service condition only awards, share-based compensation expense is based on the fair value of the underlying awards and amortized on a straight-line basis. For PSAs, share-based compensation expense is amortized on a straight-line basis for each separate vesting portion of the awards. The Company accounts for forfeitures as they occur. The Company utilizes the Black-Scholes-Merton (“BSM”) option-pricing model to estimate the fair value of its ESPP purchase rights. The BSM model requires various highly subjective assumptions that represent management's best estimates of volatility, risk-free interest rate, expected life, and dividend yield. The Company estimates expected volatility based on the implied volatility of market-traded options, on the Company's common stock, adjusted for other relevant factors including historical volatility of the Company’s common stock over the most recent period commensurate with the estimated expected life of the Company’s ESPP. The expected life of ESPP purchase rights approximates the offering period. The Company determines the grant date fair value of its RSUs, RSAs, and PSAs based on the closing market price of the Company’s common stock on the date of grant, adjusted by the present value of the dividends expected to be paid on the underlying shares of common stock during the requisite and derived service period as these awards are not entitled to receive dividends until vested.
Provision for Income Taxes	Provision for Income Taxes Deferred tax assets and liabilities are recognized for the expected tax consequences of temporary differences between the tax basis of assets and liabilities and their reported amounts. Valuation allowances are recorded to reduce deferred tax assets to the amount that will more likely than not be realized. The Company accounts for uncertainty in income taxes using a two-step approach to recognize and measure uncertain tax positions. The first step is to evaluate the tax position for recognition by determining if the weight of available evidence indicates that it is more likely than not that the position will be sustained on audit, including resolution of related appeals or litigation processes, if any. The second step is to measure the tax benefit as the largest amount that is more than 50% likely of being realized upon settlement. The Company classifies the liability for unrecognized tax benefits as current to the extent that the Company anticipates payment (or receipt) of cash within one year. Interest and penalties related to uncertain tax positions are recognized in the provision for income taxes. The Company accounts for the current impacts of U.S. tax on certain foreign subsidiaries income, which is referred to as Global Intangible Low-Taxed Income, in the year earned.
Concentrations of Risk	Concentrations of Risk Financial instruments that subject the Company to concentrations of credit risk consist primarily of cash and cash equivalents, investments, derivatives, and accounts receivable. The Company invests only in high-quality credit instruments and maintains its cash, cash equivalents, and available-for-sale investments in fixed income securities with several high-quality institutions. Deposits held with banks, including those held in foreign branches of global banks, may exceed the amount of insurance provided on such deposits. We mitigate the concentration of credit risk in our investment portfolio through diversification of the investments in various industries and asset classes, and limits to the amount of credit exposure to any single issuer and credit rating. The Company’s derivatives expose it to credit risk to the extent that counterparties may be unable to meet the terms of the agreement. The Company has a risk assessment and mitigation framework to evaluate the potential risk of loss with any one counterparty resulting from this type of credit risk. As part of this risk mitigation framework, the Company transacts with major financial institutions with high credit ratings and also enters into master netting agreements, which permit net settlement of the transactions with the same counterparty. The Company performs periodic evaluations of the relative credit standing of these financial institutions. Therefore, the Company does not expect material losses as a result of defaults by counterparties. Generally, credit risk with respect to accounts receivable is diversified due to the number of entities comprising the Company's customer base and their dispersion across different geographic locations throughout the world. The Company performs ongoing credit evaluations of its customers and generally does not require collateral on accounts receivable. For the years ended December 31, 2022, 2021, and 2020, no single customer accounted for 10% or more of net revenues.
Recently Adopted Accounting Standards	Recently Adopted Accounting Standards Accounting for Contract Assets and Contract Liabilities from Contracts with Customers : On January 1, 2022, the Company early adopted ASU No. 2021-08 (Topic 805), Accounting for Contract Assets and Contract Liabilities from Contracts with Customers , which requires contract assets and contract liabilities acquired in a business combination to be recognized and measured by the acquirer on the acquisition date in accordance with ASC 606, Revenue from Contracts with Customers , as if the contracts were originated by the acquirer. Upon adoption, the standard did not have a material impact on the Consolidated Financial Statements. Reference Rate Reform : In March 2020, the FASB issued ASU No. 2020-04 (Topic 848), Reference Rate Reform, which provides temporary optional expedients and exceptions to the existing guidance on contract modifications and hedge accounting to ease the financial reporting burdens related to the expected market transition from the London Interbank Offered Rate (LIBOR) and other interbank offered rates to alternative reference rates. The standard became effective upon issuance and may be applied to any new or amended contracts, hedging relationships, and other transactions that reference LIBOR through December 31, 2022. In December 2022, the FASB issued ASU No 2022-06, extending the sunset date of the relief provided
Net Income per Share	Basic net income per share is computed using net income available to common stockholders and the weighted-average number of common shares outstanding for the period. Diluted net income per share is computed using net income available to common stockholders and the weighted-average number of common shares outstanding plus potentially dilutive common shares outstanding during the period. Dilutive potential common shares consist of common shares issuable upon exercise of stock options and purchase rights, and vesting of RSUs, RSAs, and PSAs. The Company includes the common shares underlying PSAs in the calculation of diluted net income per share only when they become contingently issuable. Anti-dilutive shares are excluded from the computation of diluted net income per share.

Description of Business, Basi_3

Description of Business, Basis of Presentation and Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Schedule of Property and Equipment, Net	Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated using the straight-line method, over the estimated useful lives of the following assets: Estimated Useful Life (years) Computers, equipment, and software 1.5 to 10 Furniture and fixtures 5 to 7 Building and building improvements 7 to 40 Land improvements 10 to 40 Leasehold improvements Lease term, not to exceed 10 years Property and equipment, net, consisted of the following (in millions): As of December 31, 2022 2021 Computers and equipment $ 940.0 $ 1,023.5 Software 220.3 226.8 Leasehold improvements 189.2 197.6 Furniture and fixtures 45.4 46.8 Building and building improvements 271.9 269.3 Land and land improvements 243.6 243.5 Construction-in-process 12.1 11.2 Property and equipment, gross 1,922.5 2,018.7 Accumulated depreciation (1,255.7) (1,315.7) Property and equipment, net $ 666.8 $ 703.0

Divestiture (Tables)

Divestiture (Tables)	12 Months Ended
	Dec. 31, 2022
Discontinued Operations and Disposal Groups [Abstract]
Disposal Groups, Including Discontinued Operations	The following table presents the carrying value of the major components of assets and liabilities derecognized as of April 4, 2022 (in millions): As of April 4, Assets: Total current assets $ 1.0 Property and equipment, net 3.6 Deferred tax assets 3.9 Other long-term assets 1.1 Purchased intangible assets, net 49.0 Goodwill 28.9 Total assets held for sale $ 87.5 Liabilities: Accounts payable $ 1.4 Other liabilities 1.1 Total liabilities held for sale $ 2.5

Cash Equivalents and Investme_2

Cash Equivalents and Investments (Tables)	12 Months Ended
	Dec. 31, 2022
Cash Equivalents and Investments [Abstract]
Schedule of Unrealized Gains and Losses and Fair Value of Available-For-Sale Debt Securities	The following table summarizes the Company's unrealized gains and losses and fair value of investments designated as available-for-sale debt securities as of December 31, 2022 and December 31, 2021 (in millions): As of December 31, 2022 As of December 31, 2021 Amortized Gross Unrealized Gross Unrealized Estimated Fair Amortized Gross Unrealized Gross Unrealized Estimated Fair Fixed income securities: Asset-backed and mortgage-backed securities $ 37.8 $ — $ (1.2) $ 36.6 $ 139.1 $ — $ (0.5) $ 138.6 Certificates of deposit — — — — 5.0 — — 5.0 Commercial paper — — — — 75.8 — — 75.8 Corporate debt securities 277.5 — (7.1) 270.4 443.3 0.7 (1.5) 442.5 Foreign government debt securities 8.8 — (0.4) 8.4 12.8 — (0.1) 12.7 Time deposits 70.6 — — 70.6 35.2 — — 35.2 U.S. government agency securities 18.6 — (0.6) 18.0 26.8 — (0.1) 26.7 U.S. government securities 9.0 — (0.2) 8.8 73.5 0.1 — 73.6 Total fixed income securities 422.3 — (9.5) 412.8 811.5 0.8 (2.2) 810.1 Privately-held debt and redeemable preferred stock securities 15.5 37.4 — 52.9 9.6 37.4 — 47.0 Total available-for-sale debt securities $ 437.8 $ 37.4 $ (9.5) $ 465.7 $ 821.1 $ 38.2 $ (2.2) $ 857.1 Reported as: Cash equivalents $ 70.6 $ — $ — $ 70.6 $ 47.2 $ — $ — $ 47.2 Short-term investments 205.9 — (3.3) 202.6 306.8 0.7 (0.1) 307.4 Long-term investments 145.8 — (6.2) 139.6 457.5 0.1 (2.1) 455.5 Other long-term assets 15.5 37.4 — 52.9 9.6 37.4 — 47.0 Total $ 437.8 $ 37.4 $ (9.5) $ 465.7 $ 821.1 $ 38.2 $ (2.2) $ 857.1
Schedule of Maturities of Fixed Income Securities	The following table presents the contractual maturities of the Company's total fixed income securities as of December 31, 2022 (in millions): Amortized Estimated Fair Due in less than one year $ 276.5 $ 273.2 Due between one and five years 145.8 139.6 Total $ 422.3 $ 412.8
Schedule of Investments in Equity Securities	The following table presents the Company's investments in equity securities as of December 31, 2022 and 2021 (in millions): As of December 31, 2022 2021 Equity investments with readily determinable fair value Money market funds $ 420.8 $ 382.0 Mutual funds 28.1 33.4 Publicly-traded equity securities 7.7 8.1 Equity investments without readily determinable fair value 137.7 150.1 Equity investment under the equity method of accounting 36.0 — Total equity securities $ 630.3 $ 573.6 Reported as: Cash equivalents $ 420.8 $ 371.5 Short-term investments 7.7 8.1 Prepaid expenses and other current assets 2.4 15.1 Other long-term assets 199.4 178.9 Total $ 630.3 $ 573.6
Schedule of Reconciliation of Cash, Cash Equivalents and Restricted Cash	The following table provides a reconciliation of cash, cash equivalents, and restricted cash included in the Consolidated Balance Sheets as of December 31, 2022 and December 31, 2021 (in millions): As of December 31, 2022 2021 Cash and cash equivalents $ 880.1 $ 922.5 Restricted cash included in Prepaid expenses and other current assets 15.2 17.2 Restricted cash included in Other long-term assets 2.4 3.0 Total cash, cash equivalents, and restricted cash $ 897.7 $ 942.7

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	12 Months Ended
	Dec. 31, 2022
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis	The following table provides a summary of assets and liabilities measured at fair value on a recurring basis and as reported in the Consolidated Balance Sheets (in millions): Fair Value Measurements at December 31, 2022 Fair Value Measurements at December 31, 2021 Quoted Prices in Significant Other Significant Other Total Quoted Prices in Significant Other Significant Other Total Assets: Available-for-sale debt securities: Asset-backed and mortgage-backed securities $ — $ 36.6 $ — $ 36.6 $ — $ 138.6 $ — $ 138.6 Certificates of deposit — — — — — 5.0 — 5.0 Commercial paper — — — — — 75.8 — 75.8 Corporate debt securities — 270.4 — 270.4 — 442.5 — 442.5 Foreign government debt securities — 8.4 — 8.4 — 12.7 — 12.7 Time deposits — 70.6 — 70.6 — 35.2 — 35.2 U.S. government agency securities — 18.0 — 18.0 — 26.7 — 26.7 U.S. government securities 8.8 — — 8.8 42.3 31.3 — 73.6 Privately-held debt and redeemable preferred stock securities — — 52.9 52.9 — — 47.0 47.0 Total available-for-sale debt securities 8.8 404.0 52.9 465.7 42.3 767.8 47.0 857.1 Equity securities: Money market funds 420.8 — — 420.8 382.0 — — 382.0 Mutual funds 28.1 — — 28.1 33.4 — — 33.4 Publicly-traded equity securities 7.7 — — 7.7 8.1 — — 8.1 Total equity securities 456.6 — — 456.6 423.5 — — 423.5 Derivative assets: Foreign exchange contracts — 1.3 — 1.3 — 9.2 — 9.2 Interest rate contracts — 125.4 — 125.4 — 47.1 — 47.1 Total derivative assets — 126.7 — 126.7 — 56.3 — 56.3 Total assets measured at fair value on a recurring basis $ 465.4 $ 530.7 $ 52.9 $ 1,049.0 $ 465.8 $ 824.1 $ 47.0 $ 1,336.9 Liabilities: Derivative liabilities: Foreign exchange contracts $ — $ (37.6) $ — $ (37.6) $ — $ (24.0) $ — $ (24.0) Interest rate contracts — (87.4) — (87.4) — (2.5) — (2.5) Total derivative liabilities — (125.0) — (125.0) — (26.5) — (26.5) Total liabilities measured at fair value on a recurring basis $ — $ (125.0) $ — $ (125.0) $ — $ (26.5) $ — $ (26.5) Total assets, reported as: Cash equivalents $ 420.8 $ 70.6 $ — $ 491.4 $ 371.6 $ 47.2 $ — $ 418.8 Short-term investments 14.6 195.7 — 210.3 41.5 274.0 — 315.5 Long-term investments 1.9 137.7 — 139.6 8.8 446.7 — 455.5 Prepaid expenses and other current assets 2.4 0.8 — 3.2 15.1 8.8 — 23.9 Other long-term assets 25.7 125.9 52.9 204.5 28.8 47.4 47.0 123.2 Total assets measured at fair value on a recurring basis $ 465.4 $ 530.7 $ 52.9 $ 1,049.0 $ 465.8 $ 824.1 $ 47.0 $ 1,336.9 Fair Value Measurements at December 31, 2022 Fair Value Measurements at December 31, 2021 Quoted Prices in Significant Other Significant Other Total Quoted Prices in Significant Other Significant Other Total Total liabilities, reported as: Other accrued liabilities $ — $ (32.5) $ — $ (32.5) $ — $ (14.9) $ — $ (14.9) Other long-term liabilities — (92.5) — (92.5) — (11.6) — (11.6) Total liabilities measured at fair value on a recurring basis $ — $ (125.0) $ — $ (125.0) $ — $ (26.5) $ — $ (26.5)

Derivative Instruments (Tables)

Derivative Instruments (Tables)	12 Months Ended
	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Derivative Instruments	The notional amount of the Company's derivative instruments is summarized as follows (in millions): As of December 31, 2022 2021 Designated derivatives: Cash flow hedges: Foreign currency contracts $ 775.9 $ 873.9 Interest rate lock contracts 650.0 650.0 Fair value hedges: Interest rate swap contracts 600.0 600.0 Total designated derivatives $ 2,025.9 $ 2,123.9 Non-designated derivatives 163.5 144.6 Total $ 2,189.4 $ 2,268.5
Schedule of Derivative Liabilities at Fair Value	The fair value of derivative instruments on the Consolidated Balance Sheets was as follows: As of December 31, Balance Sheet Location 2022 2021 Derivative assets: Derivatives designated as hedging instruments: Foreign currency contracts as cash flow hedges Other current assets $ 0.7 $ 8.7 Foreign currency contracts as cash flow hedges Other long-term assets 0.5 0.4 Interest rate lock contracts Other long-term assets 125.4 45.0 Interest rate swap contracts Other long-term assets — 2.1 Total derivatives designated as hedging instruments $ 126.6 $ 56.2 Derivatives not designated as hedging instruments Other current assets 0.1 0.1 Total derivative assets $ 126.7 $ 56.3 Derivative liabilities: Derivatives designated as hedging instruments: Foreign currency contracts Other accrued liabilities $ 32.3 $ 14.8 Foreign currency contracts Other long-term liabilities 5.1 9.1 Interest rate swap contracts Other long-term liabilities 87.4 2.5 Total derivatives designated as hedging instruments $ 124.8 $ 26.4 Derivatives not designated as hedging instruments Other accrued liabilities 0.2 0.1 Total derivative liabilities $ 125.0 $ 26.5
Schedule of Derivative Assets at Fair Value	The fair value of derivative instruments on the Consolidated Balance Sheets was as follows: As of December 31, Balance Sheet Location 2022 2021 Derivative assets: Derivatives designated as hedging instruments: Foreign currency contracts as cash flow hedges Other current assets $ 0.7 $ 8.7 Foreign currency contracts as cash flow hedges Other long-term assets 0.5 0.4 Interest rate lock contracts Other long-term assets 125.4 45.0 Interest rate swap contracts Other long-term assets — 2.1 Total derivatives designated as hedging instruments $ 126.6 $ 56.2 Derivatives not designated as hedging instruments Other current assets 0.1 0.1 Total derivative assets $ 126.7 $ 56.3 Derivative liabilities: Derivatives designated as hedging instruments: Foreign currency contracts Other accrued liabilities $ 32.3 $ 14.8 Foreign currency contracts Other long-term liabilities 5.1 9.1 Interest rate swap contracts Other long-term liabilities 87.4 2.5 Total derivatives designated as hedging instruments $ 124.8 $ 26.4 Derivatives not designated as hedging instruments Other accrued liabilities 0.2 0.1 Total derivative liabilities $ 125.0 $ 26.5

Goodwill and Purchased Intang_2

Goodwill and Purchased Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2022
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The Company's goodwill activity was as follows (in millions): Total December 31, 2020 $ 3,669.6 Additions due to business combinations 92.5 December 31, 2021 3,762.1 Other (*) (27.7) December 31, 2022 $ 3,734.4 ______________________ (*) Other primarily consists of $28.9 million reduction in goodwill due to the divestiture of the Company's silicon photonics business. See Note 2, Divestiture , for further discussion.
Schedule of Acquired Indefinite-Lived Intangible Assets by Major Class	The Company’s purchased intangible assets, net, were as follows (in millions): As of December 31, 2022 As of December 31, 2021 Gross Accumulated Accumulated Impairments and Net Gross Accumulated Accumulated Impairments and Net Finite-lived intangible assets: Technologies and patents $ 913.1 $ (721.3) $ (55.1) $ 136.7 $ 913.1 $ (660.7) $ (55.1) $ 197.3 Customer contracts, support agreements, and related relationships 136.3 (111.2) (2.8) 22.3 136.3 (98.6) (2.8) 34.9 Trade names and other 9.6 (8.1) — 1.5 9.6 (6.5) — 3.1 Total 1,059.0 (840.6) (57.9) 160.5 1,059.0 (765.8) (57.9) 235.3 Indefinite-lived intangible assets: IPR&D — — — — 49.0 — — 49.0 Total purchased intangible assets $ 1,059.0 $ (840.6) $ (57.9) $ 160.5 $ 1,108.0 $ (765.8) $ (57.9) $ 284.3
Schedule of Acquired Finite-Lived Intangible Assets by Major Class	The Company’s purchased intangible assets, net, were as follows (in millions): As of December 31, 2022 As of December 31, 2021 Gross Accumulated Accumulated Impairments and Net Gross Accumulated Accumulated Impairments and Net Finite-lived intangible assets: Technologies and patents $ 913.1 $ (721.3) $ (55.1) $ 136.7 $ 913.1 $ (660.7) $ (55.1) $ 197.3 Customer contracts, support agreements, and related relationships 136.3 (111.2) (2.8) 22.3 136.3 (98.6) (2.8) 34.9 Trade names and other 9.6 (8.1) — 1.5 9.6 (6.5) — 3.1 Total 1,059.0 (840.6) (57.9) 160.5 1,059.0 (765.8) (57.9) 235.3 Indefinite-lived intangible assets: IPR&D — — — — 49.0 — — 49.0 Total purchased intangible assets $ 1,059.0 $ (840.6) $ (57.9) $ 160.5 $ 1,108.0 $ (765.8) $ (57.9) $ 284.3
Schedule of Estimated Future Amortization Expense of Purchased Intangible Assets with Finite Lives	As of December 31, 2022, the estimated future amortization expense of purchased intangible assets with finite lives was as follows (in millions): Years Ending December 31, Amount 2023 $ 68.8 2024 49.2 2025 39.6 2026 2.9 2027 — Total $ 160.5

Other Financial Information (Ta

Other Financial Information (Tables)	12 Months Ended
	Dec. 31, 2022
Other Financial Information [Abstract]
Schedule of Inventories	Total inventory consisted of the following (in millions): As of December 31, 2022 2021 Production and service materials $ 479.6 $ 208.6 Finished goods 163.3 75.6 Total inventory $ 642.9 $ 284.2 Reported as: Inventory $ 619.4 $ 272.6 Other long-term assets 23.5 11.6 Total inventory $ 642.9 $ 284.2
Schedule of Prepaid Expenses Other Current Assets	Prepaid expenses and other current assets consisted of the following (in millions): As of December 31, 2022 2021 Contract manufacturer deposits $ 434.7 $ 223.8 Prepaid expenses 104.3 104.3 Other current assets 141.0 123.5 Total prepaid expenses and other current assets $ 680.0 $ 451.6
Schedule of Property and Equipment, Net	Property and equipment are recorded at cost less accumulated depreciation. Depreciation is calculated using the straight-line method, over the estimated useful lives of the following assets: Estimated Useful Life (years) Computers, equipment, and software 1.5 to 10 Furniture and fixtures 5 to 7 Building and building improvements 7 to 40 Land improvements 10 to 40 Leasehold improvements Lease term, not to exceed 10 years Property and equipment, net, consisted of the following (in millions): As of December 31, 2022 2021 Computers and equipment $ 940.0 $ 1,023.5 Software 220.3 226.8 Leasehold improvements 189.2 197.6 Furniture and fixtures 45.4 46.8 Building and building improvements 271.9 269.3 Land and land improvements 243.6 243.5 Construction-in-process 12.1 11.2 Property and equipment, gross 1,922.5 2,018.7 Accumulated depreciation (1,255.7) (1,315.7) Property and equipment, net $ 666.8 $ 703.0
Schedule of Warranties	Changes in the Company’s warranty reserve were as follows (in millions): As of December 31, 2022 2021 Beginning balance $ 33.0 $ 30.2 Provisions made during the period, net 30.1 39.5 Actual costs incurred during the period (33.6) (36.7) Ending balance $ 29.5 $ 33.0
Schedule of Performance Obligation	The following table summarizes the breakdown of RPO as of December 31, 2022 and when the Company expects to recognize the amounts as revenue (in millions): Revenue Recognition Expected by Period Total Less than 1 year 1-3 years More than 3 years Product $ 114.3 $ 96.9 $ 14.3 $ 3.1 Service 1,563.7 938.3 474.6 150.8 Total $ 1,678.0 $ 1,035.2 $ 488.9 $ 153.9
Schedule of Other Expense, Net	Other expense, net consisted of the following (in millions): Years Ended December 31, 2022 2021 2020 Interest income $ 19.6 $ 14.9 $ 36.3 Interest expense (58.6) (50.8) (77.0) Gain on investments, net 8.8 17.6 13.3 Other 1.6 1.5 (5.5) Other expense, net $ (28.6) $ (16.8) $ (32.9)
Deferred revenue	Details of the Company's deferred revenue, as reported in the Consolidated Balance Sheets, were as follows (in millions): As of December 31, 2022 2021 Deferred product revenue, net $ 108.8 $ 129.1 Deferred service revenue, net 1,554.3 1,284.5 Total $ 1,663.1 $ 1,413.6 Reported as: Current $ 1,020.5 $ 937.9 Long-term 642.6 475.7 Total $ 1,663.1 $ 1,413.6

Restructuring Charges (Tables)

Restructuring Charges (Tables)	12 Months Ended
	Dec. 31, 2022
Restructuring and Related Activities [Abstract]
Schedule of Restructuring Charges	The following table presents restructuring charges included in the Consolidated Statements of Operations (in millions): Years Ended December 31, 2022 2021 2020 Severance $ 12.4 $ 13.6 $ 62.8 Contract terminations and facility exit-related 7.8 29.3 5.2 Total $ 20.2 $ 42.9 $ 68.0
Schedule of Restructuring Liabilities	The following table provides a summary of changes in the restructuring liabilities associated with the 2022 Restructuring Plan and 2021 Restructuring Plan (in millions): December 31, Charges Cash Other December 31, Severance $ 1.4 $ 12.4 $ (10.9) $ 0.1 $ 3.0 Contract terminations and facility exit-related 10.9 7.8 (13.6) (2.0) 3.1 Total $ 12.3 $ 20.2 $ (24.5) $ (1.9) $ 6.1

Debt and Financing (Tables)

Debt and Financing (Tables)	12 Months Ended
	Dec. 31, 2022
Debt Instruments [Abstract]
Schedule of Long-term Debt	The following table summarizes the Company's total debt (in millions, except percentages): As of December 31, Maturity Date Effective Interest 2022 2021 Senior Notes ("Notes"): 1.200% fixed-rate notes December 2025 1.37 % $ 400.0 $ 400.0 3.750% fixed-rate notes August 2029 3.86 % 500.0 500.0 2.000% fixed-rate notes December 2030 2.12 % 400.0 400.0 5.950% fixed-rate notes March 2041 6.03 % 400.0 400.0 Total Notes 1,700.0 1,700.0 Unaccreted discount and debt issuance costs (11.3) (12.9) Hedge accounting fair value adjustments (*) (87.4) (0.3) Total $ 1,601.3 $ 1,686.8 ________________________________ (*) Represents the fair value adjustments for interest rate swaps with an aggregate notional amount of $600.0 million. These interest rate swaps convert the fixed interest rates of certain Notes to floating interest rates and are designated as fair value hedges. See Note 5, Derivative Instruments , for a discussion of the Company's interest rate swaps.
Schedule of Maturities of Long-term Debt	As of December 31, 2022, the Company's aggregate debt maturities based on outstanding principal were as follows (in millions): Years Ending December 31, Amount 2023 $ — 2024 — 2025 400.0 2026 — 2027 — Thereafter 1,300.0 Total $ 1,700.0

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2022
Equity [Abstract]
Schedule of Dividends Paid and Stock Repurchases and Retirements Under Stock Repurchase Program	The following table summarizes dividends paid, stock repurchases and retirements under the Company's stock repurchase programs, and stock repurchases for tax withholdings (in millions, except per share amounts): Dividends Stock Repurchases Total Year Per Share Amount Shares Average price (*) Amount Tax Withholding Amount 2022 $ 0.84 $ 270.4 9.2 $ 32.32 $ 299.7 $ 15.4 $ 585.5 2021 $ 0.80 $ 259.1 15.7 $ 27.56 $ 433.3 $ 10.2 $ 702.6 2020 $ 0.80 $ 264.1 17.9 $ 23.47 $ 375.0 $ 6.2 $ 645.3 ________________________________ (*) $23.47 average price per share for 2020 includes $375.0 million in open market purchases, and settlement of the forward contract of $40.0 million under the ASR, which was initiated during the fourth quarter of 2019.
Schedule of Accumulated Other Comprehensive Loss, Net of Taxes	The components of accumulated other comprehensive income (loss), net of related taxes, for the years ended December 31, 2022, 2021, and 2020 were as follows (in millions): Unrealized Gains/Losses on Available-for- Sale Debt Securities (1) Unrealized Gains/Losses on Cash Flow Hedges (2) Foreign Total Balance as of December 31, 2019 $ 29.7 $ (4.3) $ (43.9) $ (18.5) Other comprehensive income before reclassifications 5.7 54.4 7.7 67.8 Amount reclassified from accumulated other comprehensive income (loss) (1.3) 7.6 — 6.3 Other comprehensive income, net 4.4 62.0 7.7 74.1 Balance as of December 31, 2020 $ 34.1 $ 57.7 $ (36.2) $ 55.6 Other comprehensive loss before reclassifications (5.0) (13.5) (12.8) (31.3) Amount reclassified from accumulated other comprehensive income (loss) (1.2) (25.2) — (26.4) Other comprehensive loss, net (6.2) (38.7) (12.8) (57.7) Balance as of December 31, 2021 $ 27.9 $ 19.0 $ (49.0) $ (2.1) Other comprehensive (loss) income before reclassifications (6.5) 15.7 (30.1) (20.9) Amount reclassified from accumulated other comprehensive income 0.4 26.8 — 27.2 Other comprehensive (loss) income, net (6.1) 42.5 (30.1) 6.3 Balance as of December 31, 2022 $ 21.8 $ 61.5 $ (79.1) $ 4.2 ________________________________ (1) The reclassifications out of accumulated other comprehensive income (loss) during the years ended December 31, 2022, 2021 , and 2020 for realized gains on available-for-sale debt securities were not material, and were included in other expense, net, in the Consolidated Statements of Operations. (2) The reclassifications out of accumulated other comprehensive income (loss) for realized gains and losses on cash flow hedges was $25.8 million, $28.9 million and $(8.9) million for the year ended December 31, 2022, 2021 and 2020, respectively. The reclassified amounts were included within cost of revenues, research and development, sales and marketing, and general and administrative in the Consolidated Statements of Operations.

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2022
Share-Based Payment Arrangement [Abstract]
Schedule of Nonvested Share Activity	The following table summarizes the Company’s RSU, RSA, and PSA activity and related information as of and for the year ended December 31, 2022 (in millions, except per share amounts and years): Outstanding RSUs, RSAs, and PSAs Number of Shares Weighted Average Weighted Average Aggregate Balance at December 31, 2021 22.2 $ 24.55 Granted (1)(2) 9.4 29.62 Vested (3) (8.3) 24.44 Canceled (3.1) 25.76 Balance at December 31, 2022 20.2 $ 26.78 1.2 $ 646.6 As of December 31, 2022 Vested and expected-to-vest RSUs, RSAs, and PSAs 16.6 $ 27.28 1.2 $ 531.5 ________________________________ (1) Includes 7.8 million service-based, 1.2 million performance-based, and 0.4 million market-based awards. The number of shares subject to performance-based and market-based conditions represents the aggregate maximum number of shares that may be issued pursuant to the award over its full term. The grant date fair value of RSUs and PSAs was reduced by the present value of dividends expected to be paid on the underlying shares of common stock during the requisite and derived service period as these awards are not entitled to receive dividends until vested. (2) The weighted-average grant-date fair value of RSUs, RSAs, and PSAs granted and assumed or substituted during 2022, 2021, and 2020 was $29.62, $26.21, and $21.59, respectively. The grant date fair value of RSUs and PSAs was reduced by the present value of dividends expected to be paid on the underlying shares of common stock during the requisite and derived service period as these awards are not entitled to receive dividends until vested. During 2022, the Company declared a quarterly cash dividend of $0.21 per share of common stock on January 27, 2022, April 26, 2022, July 26, 2022, and October 25, 2022. (3) Total fair value of RSUs, RSAs, and PSAs vested during 2022, 2021, and 2020 was $202.2 million, $184.2 million, and $174.7 million, respectively.
Shares Available for Grant	The following table presents the stock activity and the total number of shares available for grant under the 2015 Plan (in millions): Number of Shares Balance as of December 31, 2021 5.1 Additional shares authorized 4.5 Options, RSUs, and PSAs granted (*) (9.0) RSUs and PSAs canceled (*) 2.8 Balance as of December 31, 2022 3.4 ________________________________ (*) In May 2019, the 2015 Plan was amended, and the amendment removed the fungible share adjustment used to determine shares available for issuance. Under the original terms of the 2015 Plan, RSUs and PSAs with a per share or unit purchase price lower than 100% of the fair market value of the Company's common stock on the day of the grant were counted against shares authorized under the plan as two and one-tenth shares of common stock ("the prior fungible rate") for each share subject to such award. Pursuant to the amendment, beginning on May 14, 2019, each share award granted under the 2015 Plan reduces the share reserve by one share and all share awards granted on May 14, 2019, and thereafter that are later forfeited, canceled or terminated are returned to the share reserve in the same manner. During 2022, among the total 2.8 million of canceled shares, 0.9 million shares represent the shares returned to the share reserve at the prior fungible rate. The number of shares subject to PSAs granted represents the maximum number of shares that may be issued pursuant to the award over its full term.
Schedule Of Share-based Payment Award, Stock Options and Employee Stock Purchase Plan, Valuation Assumptions	The weighted-average assumptions used and the resulting estimates of fair value for ESPP purchase rights and market-based RSUs were as follows: Years Ended December 31, 2022 2021 2020 ESPP Purchase Rights: Volatility 29% 32% 31% Risk-free interest rate 1.1% 0.1% 0.8% Expected life (years) 1.3 1.3 1.3 Dividend yield 2.5% 3.0% 3.3% Weighted-average fair value per share $8.84 $6.96 $6.34 Market-based RSUs: Volatility 30% 30% 25% Risk-free interest rate 1.7% 0.2% 1.3% Dividend yield 2.5% 3.4% 3.3% Weighted-average fair value per share $47.96 $30.70 $26.32
Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs	Share-based compensation expense associated with stock options, RSUs, RSAs, PSAs, and ESPP purchase rights was recorded in the following cost and expense categories in the Company's Consolidated Statements of Operations (in millions): Years Ended December 31, 2022 2021 2020 Cost of revenues - Product $ 5.9 $ 5.3 $ 5.4 Cost of revenues - Service 17.4 18.2 15.8 Research and development 84.0 93.1 78.8 Sales and marketing 59.1 65.9 58.2 General and administrative 42.9 40.1 31.4 Total $ 209.3 $ 222.6 $ 189.6
Schedule of Disclosure of Share-based Compensation Arrangements by Share-based Payment Award	The following table summarizes share-based compensation expense by award type (in millions): Years Ended December 31, 2022 2021 2020 Stock options $ 5.4 $ 9.3 $ 7.3 RSUs, RSAs, and PSAs 181.9 196.2 162.6 ESPP Purchase Rights 22.0 17.1 19.7 Total $ 209.3 $ 222.6 $ 189.6

Segments (Tables)

Segments (Tables)	12 Months Ended
	Dec. 31, 2022
Segment Reporting [Abstract]
Schedule of Financial Information by Segment	The following table presents net revenues by customer solution (in millions): Years Ended December 31, 2022 2021 2020 Customer Solutions: Automated WAN Solutions $ 1,865.3 $ 1,665.0 $ 1,622.2 Cloud-Ready Data Center 878.9 727.1 677.1 AI-Driven Enterprise 1,026.2 830.4 656.2 Hardware Maintenance and Professional Services 1,530.8 1,512.9 1,489.6 Total $ 5,301.2 $ 4,735.4 $ 4,445.1 The following table presents net revenues by customer vertical (in millions): Years Ended December 31, 2022 2021 2020 Cloud $ 1,393.6 $ 1,228.0 $ 1,081.2 Service Provider 1,891.2 1,839.1 1,761.7 Enterprise 2,016.4 1,668.3 1,602.2 Total $ 5,301.2 $ 4,735.4 $ 4,445.1
Schedule of Net Revenues by Geographic Region	The Company attributes revenues to geographic region based on the customer’s shipping address. The following table presents net revenues by geographic region (in millions): Years Ended December 31, 2022 2021 2020 Americas: United States $ 2,931.6 $ 2,426.9 $ 2,233.9 Other 225.2 222.2 211.2 Total Americas 3,156.8 2,649.1 2,445.1 Europe, Middle East, and Africa 1,370.0 1,314.5 1,233.8 Asia Pacific 774.4 771.8 766.2 Total $ 5,301.2 $ 4,735.4 $ 4,445.1
Schedule of Property and Equipment by Geographic Region	The following table presents geographic information for property and equipment, net (in millions). As of December 31, 2022 2021 United States $ 579.3 $ 623.4 International 87.5 79.6 Property and equipment, net $ 666.8 $ 703.0

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Schedule of Components of Pretax Income	The components of pretax income are summarized as follows (in millions): Years Ended December 31, 2022 2021 2020 Domestic $ 509.5 $ 264.6 $ 204.2 Foreign 26.8 45.5 61.0 Total pretax income $ 536.3 $ 310.1 $ 265.2
Schedule of Components of Provision (Benefit) for Income Taxes	The provision (benefit) for income taxes is summarized as follows (in millions): Years Ended December 31, 2022 2021 2020 Current provision (benefit): Federal $ 223.6 $ 63.4 $ 73.4 States 23.9 15.9 20.3 Foreign 36.2 48.2 (21.6) Total current provision (benefit) 283.7 127.5 72.1 Deferred (benefit) provision: Federal (199.3) (54.3) (58.7) States (13.6) (4.1) (6.6) Foreign (10.3) (11.7) 0.6 Total deferred (benefit) provision (223.2) (70.1) (64.7) Total provision for income taxes $ 60.5 $ 57.4 $ 7.4
Schedule of Effective Income Tax Rate Reconciliation	The provision (benefit) for income taxes differs from the amount computed by applying the federal statutory tax rate of 21% to pretax income for each of the years presented as follows (in millions): Years Ended December 31, 2022 2021 2020 Expected provision at statutory rate $ 112.7 $ 65.1 $ 55.7 State taxes, net of federal benefit 12.0 6.5 8.7 Foreign income at different tax rates (18.1) (0.2) (5.9) R&D tax credits (23.6) (16.6) (16.4) Share-based compensation (7.4) (2.2) 9.0 Non-deductible compensation 4.0 4.2 3.5 Temporary differences not currently benefited — — (0.9) Recognition of previously unrecognized tax benefits (8.1) — (63.7) Cost sharing adjustment - Altera — — 20.1 Other (11.0) 0.6 (2.7) Total provision for income taxes $ 60.5 $ 57.4 $ 7.4
Schedule of Deferred Tax Assets and Liabilities	Significant components of the Company's long-term deferred tax assets and deferred tax liabilities are as follows (in millions): As of December 31, 2022 2021 Deferred tax assets: Net operating loss carry-forwards $ 57.2 $ 72.5 Research and other credit carry-forwards 281.3 272.2 Deferred revenue 58.1 47.7 Share-based compensation 17.2 17.9 Capitalized R&D expenditure 293.1 102.0 Reserves and accruals not currently deductible 66.1 61.0 Operating lease liabilities 39.7 45.4 Other 13.2 9.9 Total deferred tax assets 825.9 628.6 Valuation allowance (310.9) (300.9) Deferred tax assets, net of valuation allowance 515.0 327.7 Deferred tax liabilities: Property and equipment basis differences — (1.3) Purchased intangible assets (32.3) (56.5) Unremitted foreign earnings (23.7) (25.5) Net unrealized gain (35.8) (21.0) Operating lease assets (36.1) (39.9) Total deferred tax liabilities (127.9) (144.2) Net deferred tax assets $ 387.1 $ 183.5
Schedule of Reconciliation of Unrecognized Tax Benefits	A reconciliation of the beginning and ending amount of the Company's total gross unrecognized tax benefits was as follows (in millions): Years Ended December 31, 2022 2021 2020 Balance at beginning of year $ 113.4 $ 116.0 $ 151.3 Tax positions related to current year: Additions 5.8 7.7 5.3 Tax positions related to prior years: Additions 6.9 3.3 18.1 Reductions (2.5) (3.6) (52.0) Settlements — (9.4) (1.8) Lapses in statutes of limitations (7.6) (0.6) (4.9) Balance at end of year $ 116.0 $ 113.4 $ 116.0

Net Income per Share (Tables)

Net Income per Share (Tables)	12 Months Ended
	Dec. 31, 2022
Earnings Per Share [Abstract]
Schedule of Calculation of Basic and Diluted Net Income Per Share	The Company computed basic and diluted net income per share as follows (in millions, except per share amounts): Years Ended December 31, 2022 2021 2020 Numerator: Net income $ 471.0 $ 252.7 $ 257.8 Denominator: Weighted-average shares used to compute basic net income per share 322.1 324.4 330.4 Dilutive effect of employee stock awards 7.4 7.2 4.8 Weighted-average shares used to compute diluted net income per share 329.5 331.6 335.2 Net income per share: Basic $ 1.46 $ 0.78 $ 0.78 Diluted $ 1.43 $ 0.76 $ 0.77 Anti-dilutive shares 3.4 0.5 5.3

Commitments and Contingencies (

Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2022
Commitments and Contingencies Disclosure [Abstract]
Schedule of Long-Term Purchase Commitment	The following table summarizes the Company’s purchase commitments as of December 31, 2022 (in millions): Years Ending December 31, Purchase Commitments 2023 $ 2,101.1 2024 134.9 2025 75.3 2026 80.0 2027 85.0 Total $ 2,476.3
Schedule of Unconditional Purchase Obligations	The following table summarizes the Company’s unconditional purchase obligations other than with contract manufacturers and suppliers as of December 31, 2022 (in millions): Years Ending December 31, Unconditional Purchase Obligations 2023 $ 48.4 2024 36.3 2025 9.7 2026 2.0 2027 0.4 Total $ 96.8
Schedule of Lease Costs	The components of lease costs and other information related to leases were as follows (in millions, except years and percentages): Years Ended December 31, 2022 2021 Operating lease cost $ 48.4 $ 57.4 Variable lease cost 10.0 11.5 Total lease cost $ 58.4 $ 68.9 Operating cash outflows from operating leases $ 53.1 $ 57.8 ROU assets obtained in exchange for new operating lease liabilities $ 26.0 $ 29.7 As of December 31, 2022 2021 Weighted average remaining lease term (years) 4.1 4.6 Weighted average discount rate 3.5 % 3.3 %
Schedule of Future Operating Lease Payments	As of December 31, 2022, future operating lease payments for each of the next five years and thereafter are as follows (in millions): Years Ending December 31, Amount 2023 $ 48.7 2024 48.3 2025 39.3 2026 18.5 2027 11.2 Thereafter 11.3 Total lease payments 177.3 Less: interest (12.2) Total $ 165.1 Balance Sheet Information Other accrued liabilities $ 47.4 Long-term operating lease liabilities 117.7 Total (*) $ 165.1 ________________________________ (*) Total lease liabilities as of December 31, 2022 above excluded $83.9 million in legally binding lease payments for a lease signed but not yet commenced.

Description of Business, Basi_4

Description of Business, Basis of Presentation and Significant Accounting Policies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Recording period lag	2 months
Warranty period for hardware products	1 year
Warranty period for software	90 days
Production Of Advertising
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Advertising expense	$ 7.4	$ 7.4	$ 4
Communication Of Advertising
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Advertising expense	$ 30	$ 26.6	$ 21.7
Minimum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Intangible assets, estimated useful life	4 years
Revenue from contract with customers, terms of payment	30 days
Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Intangible assets, estimated useful life	5 years
Revenue from contract with customers, terms of payment	90 days
Interest rate swap contracts | Maximum
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Expiration period	8 years

Description of Business, Basi_5

Description of Business, Basis of Presentation and Significant Accounting Policies - Property, Plant and Equipment, Useful Lives (Details)	12 Months Ended
	Dec. 31, 2022
Computers, equipment, and software | Minimum
Property and Equipment [Line Items]
Estimated Useful Life (years)	1 year 6 months
Computers, equipment, and software | Maximum
Property and Equipment [Line Items]
Estimated Useful Life (years)	10 years
Furniture and fixtures | Minimum
Property and Equipment [Line Items]
Estimated Useful Life (years)	5 years
Furniture and fixtures | Maximum
Property and Equipment [Line Items]
Estimated Useful Life (years)	7 years
Building and building improvements | Minimum
Property and Equipment [Line Items]
Estimated Useful Life (years)	7 years
Building and building improvements | Maximum
Property and Equipment [Line Items]
Estimated Useful Life (years)	40 years
Land improvements | Minimum
Property and Equipment [Line Items]
Estimated Useful Life (years)	10 years
Land improvements | Maximum
Property and Equipment [Line Items]
Estimated Useful Life (years)	40 years
Leasehold improvements
Property and Equipment [Line Items]
Estimated Useful Life (years)	10 years

Divestiture - Narrative (Detail

Divestiture - Narrative (Details) - USD ($) $ in Millions		12 Months Ended
	Apr. 04, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain on divestiture		$ 45.8	$ 0	$ 0
Equity investment under the equity method of accounting		$ 40.3	$ 0	$ 0
Silicon Photonics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity investment under the equity method of accounting	$ 40.8
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Silicon Photonics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Consideration	90
Maximum exercisable amount	30
Fair value of redemption	10.8
Gain on divestiture	45.8
Retained investment	$ 19.5
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Silicon Photonics Business
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Ownership percentage	25%
Remaining ownership percent divested	75%

Divestiture - Assets and Liabil

Divestiture - Assets and Liabilities Held for Sale (Details) - Silicon Photonics Business - Disposal Group, Held-for-sale, Not Discontinued Operations - USD ($) $ in Millions	Dec. 31, 2022	Apr. 04, 2022
Assets:
Total current assets		$ 1
Property and equipment, net		3.6
Deferred tax assets		3.9
Other long-term assets		1.1
Purchased intangible assets, net		49
Goodwill	$ 28.9	28.9
Total assets held for sale		87.5
Liabilities:
Accounts payable		1.4
Other liabilities		1.1
Total liabilities held for sale		$ 2.5

Cash Equivalents and Investme_3

Cash Equivalents and Investments - Available-For-Sale (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Available-for-sale debt securities:
Amortized Cost	$ 437.8	$ 821.1
Gross Unrealized Gains	37.4	38.2
Gross Unrealized Losses	(9.5)	(2.2)
Estimated Fair Value	465.7	857.1
Cash equivalents
Available-for-sale debt securities:
Amortized Cost	70.6	47.2
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	70.6	47.2
Short-term investments
Available-for-sale debt securities:
Amortized Cost	205.9	306.8
Gross Unrealized Gains	0	0.7
Gross Unrealized Losses	(3.3)	(0.1)
Estimated Fair Value	202.6	307.4
Long-term investments
Available-for-sale debt securities:
Amortized Cost	145.8	457.5
Gross Unrealized Gains	0	0.1
Gross Unrealized Losses	(6.2)	(2.1)
Estimated Fair Value	139.6	455.5
Other long-term assets
Available-for-sale debt securities:
Amortized Cost	15.5	9.6
Gross Unrealized Gains	37.4	37.4
Gross Unrealized Losses	0	0
Estimated Fair Value	52.9	47
Total fixed income securities
Available-for-sale debt securities:
Amortized Cost	422.3	811.5
Gross Unrealized Gains	0	0.8
Gross Unrealized Losses	(9.5)	(2.2)
Estimated Fair Value	412.8	810.1
Asset-backed and mortgage-backed securities
Available-for-sale debt securities:
Amortized Cost	37.8	139.1
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1.2)	(0.5)
Estimated Fair Value	36.6	138.6
Certificates of deposit
Available-for-sale debt securities:
Amortized Cost	0	5
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	0	5
Commercial paper
Available-for-sale debt securities:
Amortized Cost	0	75.8
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	0	75.8
Corporate debt securities
Available-for-sale debt securities:
Amortized Cost	277.5	443.3
Gross Unrealized Gains	0	0.7
Gross Unrealized Losses	(7.1)	(1.5)
Estimated Fair Value	270.4	442.5
Foreign government debt securities
Available-for-sale debt securities:
Amortized Cost	8.8	12.8
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(0.4)	(0.1)
Estimated Fair Value	8.4	12.7
Time deposits
Available-for-sale debt securities:
Amortized Cost	70.6	35.2
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Estimated Fair Value	70.6	35.2
U.S. government agency securities
Available-for-sale debt securities:
Amortized Cost	18.6	26.8
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(0.6)	(0.1)
Estimated Fair Value	18	26.7
U.S. government securities
Available-for-sale debt securities:
Amortized Cost	9	73.5
Gross Unrealized Gains	0	0.1
Gross Unrealized Losses	(0.2)	0
Estimated Fair Value	8.8	73.6
Privately-held debt and redeemable preferred stock securities
Available-for-sale debt securities:
Amortized Cost	15.5	9.6
Gross Unrealized Gains	37.4	37.4
Gross Unrealized Losses	0	0
Estimated Fair Value	$ 52.9	$ 47

Cash Equivalents and Investme_4

Cash Equivalents and Investments - Maturities of Fixed Income Securities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Amortized Cost
Amortized Cost	$ 437.8	$ 821.1
Estimated Fair Value
Total	465.7	857.1
Fixed income securities
Amortized Cost
Due in less than one year	276.5
Due between one and five years	145.8
Amortized Cost	422.3	811.5
Estimated Fair Value
Due in less than one year	273.2
Due between one and five years	139.6
Total	$ 412.8	$ 810.1

Cash Equivalents and Investme_5

Cash Equivalents and Investments - Narrative (Details)	12 Months Ended
	Dec. 31, 2022 USD ($) investment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Restricted Cash and Cash Equivalents Items [Line Items]
Gross unrealized losses	$ 9,500,000	$ 2,200,000
Total investments In unrealized loss position | investment	303
Investments in an unrealized loss position for less than 12 months	$ 800,000
Investments in an unrealized loss position for more than 12 months	8,700,000
Gross realized gains from available-for-sale debt securities	0	15,300,000	$ 0
Gross realized losses from available-for-sale debt securities	0	0	0
Equity investments, unrealized losses	0	0	0
Equity investments, unrealized gains	0	0	$ 0
Equity investments, realized losses	4,800,000
Restricted cash and investments	45,600,000
Debt Securities
Restricted Cash and Cash Equivalents Items [Line Items]
Allowance for credit losses	0	0
Prepaid expenses and other current assets
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash and investments	17,500,000
Other long-term assets
Restricted Cash and Cash Equivalents Items [Line Items]
Gross unrealized losses	0	$ 0
Restricted cash and investments	$ 28,100,000

Cash Equivalents and Investme_6

Cash Equivalents and Investments - Investments in Equity Securities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Trading, and Equity Securities, FV-NI [Line Items]
Equity investments without readily determinable fair value	$ 137.7	$ 150.1
Equity investment under the equity method of accounting	36	0
Total equity securities	630.3	573.6
Cash equivalents
Debt Securities, Trading, and Equity Securities, FV-NI [Line Items]
Total equity securities	420.8	371.5
Short-term investments
Debt Securities, Trading, and Equity Securities, FV-NI [Line Items]
Total equity securities	7.7	8.1
Inventory
Debt Securities, Trading, and Equity Securities, FV-NI [Line Items]
Total equity securities	2.4	15.1
Other long-term assets
Debt Securities, Trading, and Equity Securities, FV-NI [Line Items]
Total equity securities	199.4	178.9
Money market funds
Debt Securities, Trading, and Equity Securities, FV-NI [Line Items]
Equity investments with readily determinable fair value	420.8	382
Mutual funds
Debt Securities, Trading, and Equity Securities, FV-NI [Line Items]
Equity investments with readily determinable fair value	28.1	33.4
Publicly-traded equity securities
Debt Securities, Trading, and Equity Securities, FV-NI [Line Items]
Equity investments with readily determinable fair value	$ 7.7	$ 8.1

Cash Equivalents and Investme_7

Cash Equivalents and Investments - Restricted Cash and Investments (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 880.1	$ 922.5
Total cash, cash equivalents, and restricted cash	897.7	942.7	$ 1,383	$ 1,276.5
Prepaid expenses and other current assets
Cash and Cash Equivalents [Line Items]
Restricted cash included in Prepaid expenses and other current assets	15.2	17.2
Other long-term assets
Cash and Cash Equivalents [Line Items]
Restricted cash included in Prepaid expenses and other current assets	$ 2.4	$ 3

Fair Value Measurements - Asset

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivative assets:
Derivative assets	$ 126.7	$ 56.3
Money market funds
Equity securities:
Equity securities	420.8	382
Publicly-traded equity securities
Equity securities:
Equity securities	7.7	8.1
Fair Value, Measurements, Recurring
Available-for-sale debt securities:
Available-for-sale debt securities	465.7	857.1
Equity securities:
Equity securities	456.6	423.5
Derivative assets:
Derivative assets	126.7	56.3
Total assets measured at fair value on a recurring basis	1,049	1,336.9
Derivative liabilities:
Derivative liabilities	(125)	(26.5)
Total liabilities measured at fair value on a recurring basis	(125)	(26.5)
Fair Value, Measurements, Recurring | Cash equivalents
Derivative assets:
Total assets measured at fair value on a recurring basis	491.4	418.8
Fair Value, Measurements, Recurring | Short-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	210.3	315.5
Fair Value, Measurements, Recurring | Long-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	139.6	455.5
Fair Value, Measurements, Recurring | Prepaid expenses and other current assets
Derivative assets:
Total assets measured at fair value on a recurring basis	3.2	23.9
Fair Value, Measurements, Recurring | Other long-term assets
Derivative assets:
Total assets measured at fair value on a recurring basis	204.5	123.2
Fair Value, Measurements, Recurring | Other accrued liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	(32.5)	(14.9)
Fair Value, Measurements, Recurring | Other long-term liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	(92.5)	(11.6)
Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets	1.3	9.2
Derivative liabilities:
Derivative liabilities	(37.6)	(24)
Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets	125.4	47.1
Derivative liabilities:
Derivative liabilities	(87.4)	(2.5)
Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities
Available-for-sale debt securities:
Available-for-sale debt securities	36.6	138.6
Fair Value, Measurements, Recurring | Certificates of deposit
Available-for-sale debt securities:
Available-for-sale debt securities	0	5
Fair Value, Measurements, Recurring | Commercial paper
Available-for-sale debt securities:
Available-for-sale debt securities	0	75.8
Fair Value, Measurements, Recurring | Corporate debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	270.4	442.5
Fair Value, Measurements, Recurring | Foreign government debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	8.4	12.7
Fair Value, Measurements, Recurring | Time deposits
Available-for-sale debt securities:
Available-for-sale debt securities	70.6	35.2
Fair Value, Measurements, Recurring | U.S. government agency securities
Available-for-sale debt securities:
Available-for-sale debt securities	18	26.7
Fair Value, Measurements, Recurring | U.S. government securities
Available-for-sale debt securities:
Available-for-sale debt securities	8.8	73.6
Fair Value, Measurements, Recurring | Privately-held debt and redeemable preferred stock securities
Available-for-sale debt securities:
Available-for-sale debt securities	52.9	47
Fair Value, Measurements, Recurring | Money market funds
Equity securities:
Equity securities	420.8	382
Fair Value, Measurements, Recurring | Mutual funds
Equity securities:
Equity securities	28.1	33.4
Fair Value, Measurements, Recurring | Publicly-traded equity securities
Equity securities:
Equity securities	7.7	8.1
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Available-for-sale debt securities:
Available-for-sale debt securities	8.8	42.3
Equity securities:
Equity securities	456.6	423.5
Derivative assets:
Derivative assets	0	0
Total assets measured at fair value on a recurring basis	465.4	465.8
Derivative liabilities:
Derivative liabilities	0	0
Total liabilities measured at fair value on a recurring basis	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Cash equivalents
Derivative assets:
Total assets measured at fair value on a recurring basis	420.8	371.6
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Short-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	14.6	41.5
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Long-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	1.9	8.8
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Prepaid expenses and other current assets
Derivative assets:
Total assets measured at fair value on a recurring basis	2.4	15.1
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Other long-term assets
Derivative assets:
Total assets measured at fair value on a recurring basis	25.7	28.8
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Other accrued liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Other long-term liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets	0	0
Derivative liabilities:
Derivative liabilities	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets	0	0
Derivative liabilities:
Derivative liabilities	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Certificates of deposit
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Commercial paper
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Corporate debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Foreign government debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Time deposits
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | U.S. government agency securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | U.S. government securities
Available-for-sale debt securities:
Available-for-sale debt securities	8.8	42.3
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Privately-held debt and redeemable preferred stock securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Money market funds
Equity securities:
Equity securities	420.8	382
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Mutual funds
Equity securities:
Equity securities	28.1	33.4
Quoted Prices in Active Markets For Identical Assets (Level 1) | Fair Value, Measurements, Recurring | Publicly-traded equity securities
Equity securities:
Equity securities	7.7	8.1
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring
Available-for-sale debt securities:
Available-for-sale debt securities	404	767.8
Equity securities:
Equity securities	0	0
Derivative assets:
Derivative assets	126.7	56.3
Total assets measured at fair value on a recurring basis	530.7	824.1
Derivative liabilities:
Derivative liabilities	(125)	(26.5)
Total liabilities measured at fair value on a recurring basis	(125)	(26.5)
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Cash equivalents
Derivative assets:
Total assets measured at fair value on a recurring basis	70.6	47.2
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Short-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	195.7	274
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Long-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	137.7	446.7
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Prepaid expenses and other current assets
Derivative assets:
Total assets measured at fair value on a recurring basis	0.8	8.8
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Other long-term assets
Derivative assets:
Total assets measured at fair value on a recurring basis	125.9	47.4
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Other accrued liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	(32.5)	(14.9)
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Other long-term liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	(92.5)	(11.6)
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets	1.3	9.2
Derivative liabilities:
Derivative liabilities	(37.6)	(24)
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets	125.4	47.1
Derivative liabilities:
Derivative liabilities	(87.4)	(2.5)
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities
Available-for-sale debt securities:
Available-for-sale debt securities	36.6	138.6
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Certificates of deposit
Available-for-sale debt securities:
Available-for-sale debt securities	0	5
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Commercial paper
Available-for-sale debt securities:
Available-for-sale debt securities	0	75.8
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Corporate debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	270.4	442.5
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Foreign government debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	8.4	12.7
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Time deposits
Available-for-sale debt securities:
Available-for-sale debt securities	70.6	35.2
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | U.S. government agency securities
Available-for-sale debt securities:
Available-for-sale debt securities	18	26.7
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | U.S. government securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	31.3
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Privately-held debt and redeemable preferred stock securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Money market funds
Equity securities:
Equity securities	0	0
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Mutual funds
Equity securities:
Equity securities	0	0
Significant Other Observable Remaining Inputs (Level 2) | Fair Value, Measurements, Recurring | Publicly-traded equity securities
Equity securities:
Equity securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring
Available-for-sale debt securities:
Available-for-sale debt securities	52.9	47
Equity securities:
Equity securities	0	0
Derivative assets:
Derivative assets	0	0
Total assets measured at fair value on a recurring basis	52.9	47
Derivative liabilities:
Derivative liabilities	0	0
Total liabilities measured at fair value on a recurring basis	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Cash equivalents
Derivative assets:
Total assets measured at fair value on a recurring basis	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Short-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Long-term investments
Derivative assets:
Total assets measured at fair value on a recurring basis	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Prepaid expenses and other current assets
Derivative assets:
Total assets measured at fair value on a recurring basis	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Other long-term assets
Derivative assets:
Total assets measured at fair value on a recurring basis	52.9	47
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Other accrued liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Other long-term liabilities
Derivative liabilities:
Total liabilities measured at fair value on a recurring basis	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Foreign exchange contracts
Derivative assets:
Derivative assets	0	0
Derivative liabilities:
Derivative liabilities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Interest rate contracts
Derivative assets:
Derivative assets	0	0
Derivative liabilities:
Derivative liabilities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Asset-backed and mortgage-backed securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Certificates of deposit
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Commercial paper
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Corporate debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Foreign government debt securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Time deposits
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | U.S. government agency securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | U.S. government securities
Available-for-sale debt securities:
Available-for-sale debt securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Privately-held debt and redeemable preferred stock securities
Available-for-sale debt securities:
Available-for-sale debt securities	52.9	47
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Money market funds
Equity securities:
Equity securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Mutual funds
Equity securities:
Equity securities	0	0
Significant Other Unobservable Remaining Inputs (Level 3) | Fair Value, Measurements, Recurring | Publicly-traded equity securities
Equity securities:
Equity securities	$ 0	$ 0

Fair Value Measurements - Narra

Fair Value Measurements - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity securities without readily determinable fair value, upward adjustment		$ 0
Equity securities without readily determinable fair value, downward adjustment	$ 0
Goodwill and intangible impairment	0	0	$ 0
Significant Other Observable Remaining Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total outstanding debt, fair value	1,485,600,000	1,845,600,000
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and nonfinancial liabilities, fair value disclosure	125,000,000	26,500,000
Fair Value, Measurements, Recurring | Significant Other Unobservable Remaining Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and nonfinancial liabilities, fair value disclosure	0	0
Fair Value, Measurements, Recurring | Significant Other Observable Remaining Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and nonfinancial liabilities, fair value disclosure	125,000,000	26,500,000
Fair Value, Measurements, Nonrecurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Financial and nonfinancial liabilities, fair value disclosure	0	$ 0
Privately-held debt and redeemable preferred stock securities | Fair Value, Measurements, Recurring | Significant Other Unobservable Remaining Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Realized investment gains (losses)	$ 0

Derivative Instruments - Notion

Derivative Instruments - Notional Amount (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021	Apr. 30, 2021	Dec. 31, 2020	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Notional amount of derivatives	$ 2,189,400,000	$ 2,268,500,000
Designated derivatives
Derivatives, Fair Value [Line Items]
Notional amount of derivatives	2,025,900,000	2,123,900,000
Non-designated derivatives
Derivatives, Fair Value [Line Items]
Notional amount of derivatives	163,500,000	144,600,000
Foreign exchange contracts | Designated derivatives | Cash flow hedges
Derivatives, Fair Value [Line Items]
Notional amount of derivatives	775,900,000	873,900,000
Interest rate lock contracts | Designated derivatives | Cash flow hedges
Derivatives, Fair Value [Line Items]
Notional amount of derivatives	650,000,000	650,000,000	$ 300,000,000	$ 650,000,000	$ 300,000,000
Interest rate swap contracts | Designated derivatives | Fair value hedges
Derivatives, Fair Value [Line Items]
Notional amount of derivatives	$ 600,000,000	$ 600,000,000

Derivative Instruments - Fair V

Derivative Instruments - Fair Value of Assets and Liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Derivative assets	$ 126.7	$ 56.3
Derivative liabilities	125	26.5
Designated derivatives
Derivative [Line Items]
Derivative assets	126.6	56.2
Derivative liabilities	124.8	26.4
Other current assets | Designated derivatives | Foreign exchange contracts
Derivative [Line Items]
Derivative assets	0.7	8.7
Other current assets | Non-designated derivatives
Derivative [Line Items]
Derivative assets	0.1	0.1
Other long-term assets | Designated derivatives | Foreign exchange contracts
Derivative [Line Items]
Derivative assets	0.5	0.4
Other long-term assets | Designated derivatives | Interest rate lock contracts
Derivative [Line Items]
Derivative assets	125.4	45
Other long-term assets | Designated derivatives | Interest rate swap contracts
Derivative [Line Items]
Derivative assets	0	2.1
Other accrued liabilities | Designated derivatives | Foreign exchange contracts
Derivative [Line Items]
Derivative liabilities	32.3	14.8
Other accrued liabilities | Non-designated derivatives
Derivative [Line Items]
Derivative liabilities	0.2	0.1
Other long-term liabilities | Designated derivatives | Foreign exchange contracts
Derivative [Line Items]
Derivative liabilities	5.1	9.1
Other long-term liabilities | Designated derivatives | Interest rate swap contracts
Derivative [Line Items]
Derivative liabilities	$ 87.4	$ 2.5

Derivative Instruments - Narrat

Derivative Instruments - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Apr. 30, 2021	Dec. 31, 2019
Derivatives, Fair Value [Line Items]
Reduction in derivative asset	$ 73,800,000	$ 17,500,000
Reduction in derivative liability	73,800,000	17,500,000
Notional amount of derivatives	2,189,400,000	2,268,500,000
Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Foreign currency forward contracts, amounts of loss reclassified out of AOCI	(25,800,000)	28,900,000	$ (9,000,000)
Cash flow hedges
Derivatives, Fair Value [Line Items]
Derivative instruments, gain (loss) recognized in other comprehensive income (loss), effective portion	33,100,000	(9,100,000)	63,500,000
Designated derivatives
Derivatives, Fair Value [Line Items]
Notional amount of derivatives	$ 2,025,900,000	2,123,900,000
Designated derivatives | Cash flow hedges
Derivatives, Fair Value [Line Items]
Maximum maturities of cash flow hedge derivatives	36 months
Losses expected to be reclassified into earnings within the next 12 months	$ 31,700,000
Designated derivatives | Cash flow hedges | Interest rate lock contracts
Derivatives, Fair Value [Line Items]
Notional amount of derivatives	$ 650,000,000	650,000,000	$ 650,000,000	$ 300,000,000	$ 300,000,000
Derivative, expiration period	8 years
Swaps designated as cash flow hedges, expected termination period			3 years
Designated derivatives | Cash flow hedges | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Notional amount of derivatives	$ 775,900,000	$ 873,900,000
Minimum | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Maturity of foreign currency derivatives	1 month
Maximum | Foreign exchange contracts
Derivatives, Fair Value [Line Items]
Maturity of foreign currency derivatives	4 months

Goodwill and Purchased Intang_3

Goodwill and Purchased Intangible Assets - Goodwill Rollforward (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Apr. 04, 2022
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 3,762,100,000	$ 3,669,600,000
Additions due to business combinations		92,500,000
Other	(27,700,000)
Goodwill, end of period	3,734,400,000	3,762,100,000	$ 3,669,600,000
Goodwill impairment	0	$ 0	$ 0
Disposal Group, Held-for-sale, Not Discontinued Operations | Silicon Photonics Business
Goodwill [Roll Forward]
Goodwill	$ 28,900,000			$ 28,900,000

Goodwill and Purchased Intang_4

Goodwill and Purchased Intangible Assets - Purchased Intangible Assets, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Apr. 04, 2022
Finite-Lived Intangible Assets [Line Items]
Gross	$ 1,059	$ 1,059
Accumulated Amortization	(840.6)	(765.8)
Accumulated Impairments and Other Charges	(57.9)	(57.9)
Net	160.5	235.3
Indefinite-lived Intangible Assets [Line Items]
Total purchased intangible assets	1,059	1,108
Accumulated Amortization	(840.6)	(765.8)
Accumulated Impairments and Other Charges	(57.9)	(57.9)
Net	160.5	284.3
Amortization of intangible assets	74.8	79.5	$ 40.6
Impairment of intangible assets	0	0	$ 0
Disposal Group, Held-for-sale, Not Discontinued Operations | Silicon Photonics Business
Indefinite-lived Intangible Assets [Line Items]
Purchased intangible assets, net				$ 49
Purchased intangible assets, net				$ 49
IPR&D
Indefinite-lived Intangible Assets [Line Items]
Gross	0	49
IPR&D | Disposal Group, Held-for-sale, Not Discontinued Operations | Silicon Photonics Business
Indefinite-lived Intangible Assets [Line Items]
Purchased intangible assets, net	49
Purchased intangible assets, net	49
Technologies and patents
Finite-Lived Intangible Assets [Line Items]
Gross	913.1	913.1
Accumulated Amortization	(721.3)	(660.7)
Accumulated Impairments and Other Charges	(55.1)	(55.1)
Net	136.7	197.3
Indefinite-lived Intangible Assets [Line Items]
Accumulated Amortization	(721.3)	(660.7)
Accumulated Impairments and Other Charges	(55.1)	(55.1)
Customer Relationships [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	136.3	136.3
Accumulated Amortization	(111.2)	(98.6)
Accumulated Impairments and Other Charges	(2.8)	(2.8)
Net	22.3	34.9
Indefinite-lived Intangible Assets [Line Items]
Accumulated Amortization	(111.2)	(98.6)
Accumulated Impairments and Other Charges	(2.8)	(2.8)
Other Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Gross	9.6	9.6
Accumulated Amortization	(8.1)	(6.5)
Accumulated Impairments and Other Charges	0	0
Net	1.5	3.1
Indefinite-lived Intangible Assets [Line Items]
Accumulated Amortization	(8.1)	(6.5)
Accumulated Impairments and Other Charges	$ 0	$ 0

Goodwill and Purchased Intang_5

Goodwill and Purchased Intangible Assets - Estimated Future Amortization Expense Intangible Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Amount
2023	$ 68.8
2024	49.2
2025	39.6
2026	2.9
2027	0
Net	$ 160.5	$ 235.3

Other Financial Information - I

Other Financial Information - Inventories (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Schedule Of Inventory [Line Items]
Production and service materials	$ 479.6	$ 208.6
Finished goods	163.3	75.6
Total inventory	642.9	284.2
Inventory
Schedule Of Inventory [Line Items]
Total inventory	619.4	272.6
Other long-term assets
Schedule Of Inventory [Line Items]
Total inventory	$ 23.5	$ 11.6

Other Financial Information - P

Other Financial Information - Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Other Financial Information [Abstract]
Contract manufacturer deposits	$ 434.7	$ 223.8
Prepaid expenses	104.3	104.3
Other current assets	141	123.5
Total prepaid expenses and other current assets	$ 680	$ 451.6

Other Financial Information -_2

Other Financial Information - Property and Equipment, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Property and Equipment [Line Items]
Property and equipment, gross	$ 1,922.5	$ 2,018.7
Accumulated depreciation	(1,255.7)	(1,315.7)
Property and equipment, net	666.8	703
Depreciation expense	137.7	151	$ 166.2
Computers and equipment
Property and Equipment [Line Items]
Property and equipment, gross	940	1,023.5
Software
Property and Equipment [Line Items]
Property and equipment, gross	220.3	226.8
Leasehold improvements
Property and Equipment [Line Items]
Property and equipment, gross	189.2	197.6
Furniture and fixtures
Property and Equipment [Line Items]
Property and equipment, gross	45.4	46.8
Building and building improvements
Property and Equipment [Line Items]
Property and equipment, gross	271.9	269.3
Land and land improvements
Property and Equipment [Line Items]
Property and equipment, gross	243.6	243.5
Construction-in-process
Property and Equipment [Line Items]
Property and equipment, gross	$ 12.1	$ 11.2

Other Financial Information - W

Other Financial Information - Warranties (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Warranty Reserve [Roll Forward]
Beginning balance	$ 33	$ 30.2
Provisions made during the period, net	30.1	39.5
Actual costs incurred during the period	(33.6)	(36.7)
Ending balance	$ 29.5	$ 33

Other Financial Information - D

Other Financial Information - Deferred Revenue (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Current	$ 1,020.5	$ 937.9
Long-term	642.6	475.7
Total	1,663.1	1,413.6
Product
Disaggregation of Revenue [Line Items]
Total	108.8	129.1
Service
Disaggregation of Revenue [Line Items]
Total	$ 1,554.3	$ 1,284.5

Other Financial Information - R

Other Financial Information - Revenue, Remaining Performance Obligations and Deferred Commissions (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Deferred commission	$ 28.2	$ 34.9
Amortization of deferred commission	199.4	189.8
Impairment loss	0	$ 0
Product
Disaggregation of Revenue [Line Items]
Contract with customer, liability, revenue recognized	51.9
Service
Disaggregation of Revenue [Line Items]
Contract with customer, liability, revenue recognized	$ 808.4

Other Financial Information -_3

Other Financial Information - Revenue, Remaining Performance Obligation (Details) $ in Millions	Dec. 31, 2022 USD ($)
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 1,678
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	1,035.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	488.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	153.9
Product
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	114.3
Product | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 96.9
Revenue recognition expected by period, satisfaction period	1 year
Product | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 14.3
Revenue recognition expected by period, satisfaction period	2 years
Product | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 3.1
Revenue recognition expected by period, satisfaction period
Service
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 1,563.7
Service | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-01-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 938.3
Revenue recognition expected by period, satisfaction period	1 year
Service | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2024-01-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 474.6
Revenue recognition expected by period, satisfaction period	2 years
Service | Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2025-01-01
Disaggregation of Revenue [Line Items]
Revenue recognition expected by period	$ 150.8
Revenue recognition expected by period, satisfaction period

Other Financial Information - O

Other Financial Information - Other Expense, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other Financial Information [Abstract]
Interest income	$ 19.6	$ 14.9	$ 36.3
Interest expense	(58.6)	(50.8)	(77)
Gain on investments, net	8.8	17.6	13.3
Other	1.6	1.5	(5.5)
Other expense, net	$ (28.6)	$ (16.8)	$ (32.9)

Restructuring Charges - (Detail

Restructuring Charges - (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restructuring Cost and Reserve [Line Items]
Total	$ 20.2	$ 42.9	$ 68
Severance
Restructuring Cost and Reserve [Line Items]
Total	12.4	13.6	62.8
Contract terminations and facility exit-related
Restructuring Cost and Reserve [Line Items]
Total	$ 7.8	$ 29.3	$ 5.2

Restructuring Charges - Restruc

Restructuring Charges - Restructuring Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Restructuring Reserve [Roll Forward]
Charges	$ 20.2	$ 42.9	$ 68
Cash Payments	(24.5)
Other	(1.9)
Restructuring liability, ending balance	6.1
2021 Restructuring Plan
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning balance	12.3
Charges	20.2
Restructuring liability, ending balance		12.3
2021 Restructuring Plan | Severance
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning balance	1.4
Charges	12.4
Cash Payments	(10.9)
Other	0.1
Restructuring liability, ending balance	3	1.4
2021 Restructuring Plan | Contract terminations and facility exit-related
Restructuring Reserve [Roll Forward]
Restructuring liability, beginning balance	10.9
Charges	7.8
Cash Payments	(13.6)
Other	(2)
Restructuring liability, ending balance	$ 3.1	$ 10.9

Debt and Financing - Schedule o

Debt and Financing - Schedule of Debt (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt	$ 1,700,000,000
Unaccreted discount and debt issuance costs	(11,300,000)	$ (12,900,000)
Hedge accounting fair value adjustment	(87,400,000)	(300,000)
Total	1,601,300,000	1,686,800,000
Notional amount of derivatives	2,189,400,000	2,268,500,000
Senior Notes
Debt Instrument [Line Items]
Long-term debt	$ 1,700,000,000	1,700,000,000
Senior Notes | 1.200% fixed-rate notes
Debt Instrument [Line Items]
Stated interest rate	1.20%
Effective interest rate	1.37%
Long-term debt	$ 400,000,000	400,000,000
Senior Notes | 3.750% fixed-rate notes
Debt Instrument [Line Items]
Stated interest rate	3.75%
Effective interest rate	3.86%
Long-term debt	$ 500,000,000	500,000,000
Senior Notes | 2.000% fixed-rate notes
Debt Instrument [Line Items]
Stated interest rate	2%
Effective interest rate	2.12%
Long-term debt	$ 400,000,000	400,000,000
Senior Notes | 5.950% fixed-rate notes
Debt Instrument [Line Items]
Stated interest rate	5.95%
Effective interest rate	6.03%
Long-term debt	$ 400,000,000	400,000,000
Designated derivatives
Debt Instrument [Line Items]
Notional amount of derivatives	2,025,900,000	2,123,900,000
Fair value hedges | Interest rate swap contracts | Designated derivatives
Debt Instrument [Line Items]
Notional amount of derivatives	$ 600,000,000	$ 600,000,000

Debt and Financing - Schedule_2

Debt and Financing - Schedule of Aggregate Debt Maturities (Details) $ in Millions	Dec. 31, 2022 USD ($)
Debt Instruments [Abstract]
2023	$ 0
2024	0
2025	400
2026	0
2027	0
Thereafter	1,300
Total	$ 1,700

Debt and Financing - Narrative

Debt and Financing - Narrative (Details) - USD ($)	1 Months Ended	12 Months Ended
	Apr. 30, 2019	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Sale of receivables		$ 50,600,000	$ 31,900,000	$ 57,500,000
Proceeds from sale and collection of receivables		41,500,000	32,500,000	$ 57,400,000
Receivables from sale of receivables		$ 11,800,000	$ 3,200,000
Minimum
Debt Instrument [Line Items]
Number of days due from receivable		1 day
Maximum
Debt Instrument [Line Items]
Number of days due from receivable		90 days
Line of Credit
Debt Instrument [Line Items]
Amounts outstanding		$ 0
Revolving Credit Facility | Line of Credit
Debt Instrument [Line Items]
Debt, term	5 years
Maximum borrowing capacity	$ 500,000,000
Additional borrowing capacity	$ 200,000,000
Maximum leverage ratio	3
Maximum leverage ratio, if acquisition is consummated	3.5
Interest coverage ratio	3
Revolving Credit Facility | Line of Credit | Federal Funds Rate | Variable Rate Component, Federal Funds
Debt Instrument [Line Items]
Basis spread on variable rate	0.50%
Revolving Credit Facility | Line of Credit | ICE Benchmark Administration Settlement Rate | Variable Rate Component, ICE Benchmark Administration Settlement Rate
Debt Instrument [Line Items]
Basis spread on variable rate	1%
Revolving Credit Facility | Line of Credit | Minimum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0%
Revolving Credit Facility | Line of Credit | Minimum | Eurodollar
Debt Instrument [Line Items]
Basis spread on variable rate	0.91%
Revolving Credit Facility | Line of Credit | Maximum | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate	0.375%
Revolving Credit Facility | Line of Credit | Maximum | Eurodollar
Debt Instrument [Line Items]
Basis spread on variable rate	1.375%
Fixed Rate Note Due 2025 And Fixed Rate Note Due 2029 | Senior Notes
Debt Instrument [Line Items]
Debt instrument, redemption price, percent		100%
Repurchase price percentage related to change in control		101%

Equity - Stock Repurchase Activ

Equity - Stock Repurchase Activities (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions					3 Months Ended												12 Months Ended
	Oct. 25, 2022	Jul. 26, 2022	Apr. 26, 2022	Jan. 27, 2022	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Dividends
Per Share (in dollars per share)	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.84	$ 0.80	$ 0.80
Amount																	$ 270.4	$ 259.1	$ 264.1
Stock Repurchases
Amount																	$ 315.2	$ 443.5	421.1
Remaining forward contract, value																			$ 40
Stock Repurchase Program 2018
Stock Repurchases
Shares (in shares)																	9.2	15.7	17.9
Average price per share (in dollars per share)																	$ 32.32	$ 27.56	$ 23.47
Amount																	$ 299.7	$ 433.3	$ 375
Tax Withholding Amount																	15.4	10.2	6.2
Amount																	$ 585.5	$ 702.6	$ 645.3

Equity - Narrative (Details)

Equity - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions					1 Months Ended	3 Months Ended												12 Months Ended
	Oct. 25, 2022	Jul. 26, 2022	Apr. 26, 2022	Jan. 27, 2022	Oct. 31, 2019	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Jan. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Cash dividends declared per share of common stock (in dollars per share)						$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20
Payments of cash dividends (in dollars per share)	$ 0.21	$ 0.21	$ 0.21	$ 0.21		$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.84	$ 0.80	$ 0.80
Cash dividends																		$ 270,400,000	$ 259,100,000	$ 264,100,000
Amount																		$ 315,200,000	443,500,000	421,100,000
Stock Repurchase Program 2018
Equity, Class of Treasury Stock [Line Items]
Stock repurchase program, authorized amount					$ 3,000,000,000																$ 2,000,000,000
Stock repurchase program, increased amount					$ 1,000,000,000
Stock repurchased (in shares)																		9.2
Stock repurchased average cost (in dollars per share)																		$ 32.32
Amount																		$ 299,700,000	433,300,000	375,000,000
Stock repurchase program, authorized funds remaining						$ 600,000,000												600,000,000
Tax withholding amount																		$ 15,400,000	$ 10,200,000	$ 6,200,000

Equity - Accumulated Other Comp

Equity - Accumulated Other Comprehensive Income (loss), Net of Tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Balance	$ 4,316.9	$ 4,543.5	$ 4,610.6
Other comprehensive income before reclassifications	(20.9)	(31.3)	67.8
Amount reclassified from accumulated other comprehensive income (loss)	27.2	(26.4)	6.3
Other comprehensive income (loss), net	6.3	(57.7)	74.1
Balance	4,475.1	4,316.9	4,543.5
Other comprehensive income (loss)	25.8	28.9	(8.9)
Accumulated Other Comprehensive Income (Loss)
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Balance	(2.1)	55.6	(18.5)
Other comprehensive income (loss), net	6.3	(57.7)	74.1
Balance	4.2	(2.1)	55.6
Unrealized Gains/Losses on Available-for- Sale Debt Securities
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Balance	27.9	34.1	29.7
Other comprehensive income before reclassifications	(6.5)	(5)	5.7
Amount reclassified from accumulated other comprehensive income (loss)	0.4	(1.2)	(1.3)
Other comprehensive income (loss), net	(6.1)	(6.2)	4.4
Balance	21.8	27.9	34.1
Unrealized Gains/Losses on Cash Flow Hedges
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Balance	19	57.7	(4.3)
Other comprehensive income before reclassifications	15.7	(13.5)	54.4
Amount reclassified from accumulated other comprehensive income (loss)	26.8	(25.2)	7.6
Other comprehensive income (loss), net	42.5	(38.7)	62
Balance	61.5	19	57.7
Foreign Currency Translation Adjustments
Accumulated Other Comprehensive Income, Net of Tax [Roll Forward]
Balance	(49)	(36.2)	(43.9)
Other comprehensive income before reclassifications	(30.1)	(12.8)	7.7
Amount reclassified from accumulated other comprehensive income (loss)	0	0	0
Other comprehensive income (loss), net	(30.1)	(12.8)	7.7
Balance	$ (79.1)	$ (49)	$ (36.2)

Employee Benefit Plans - Equity

Employee Benefit Plans - Equity Incentive Plans (Details)	1 Months Ended			12 Months Ended
	May 31, 2020 shares	May 31, 2019 shares	May 31, 2017 shares	Dec. 31, 2022 USD ($) offeringPeriod shares	Dec. 31, 2021 shares	May 31, 2015 shares
Share-Based Compensation Plans
ESPP, offering period				24 months
ESPP, number of offering period | offeringPeriod				4
ESPP, purchase period				6 months
ESPP, purchase price				85%
Common stock - shares issued (in shares)				322,900,000	321,600,000
Equity Incentive Plan 2015
Share-Based Compensation Plans
Number of shares authorized (in shares)						38,000,000
Additional shares authorized (in shares)		3,700,000	23,000,000	4,500,000
Aggregate shares subject to outstanding equity awards (in shares)				16,600,000
Number of shares available for future issuance (in shares)				3,400,000	5,100,000
Equity Incentive Plan 1996 and 2006
Share-Based Compensation Plans
Maximum additional shares expired, unexercised, canceled (in shares)						29,000,000
Employee Stock Purchase Plan 2008
Share-Based Compensation Plans
Number of shares authorized (in shares)				43,000,000
Additional shares authorized (in shares)	8,000,000
Number of shares available for future issuance (in shares)				6,200,000
Discount on share purchase price for purchases made under ESPP				15%
Periodic payroll deduction - percentage of base salary				10%
ESPP individual purchase limits (in shares)				6,000
Period for share purchases under ESPP				12 months
ESPP individual purchase limits | $				$ 25,000
Period for ESPP purchases				1 year
Common stock - shares issued (in shares)				36,800,000

Employee Benefit Plans - RSU, R

Employee Benefit Plans - RSU, RSA, and PSA Activities (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions					3 Months Ended												12 Months Ended
	Oct. 25, 2022	Jul. 26, 2022	Apr. 26, 2022	Jan. 27, 2022	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Weighted Average Grant-Date Fair Value per Share
Payments of cash dividends (in dollars per share)	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.84	$ 0.80	$ 0.80
Restricted Stock Units (RSU) and Restricted Stock | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period																	3 years
Performance Shares (PSAs)
Number of Shares
Granted (in shares)																	1.2
Performance Shares (PSAs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period																	2 years
Performance Shares (PSAs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period																	3 years
RSUs, RSAs, and PSAs
Number of Shares
Balance at beginning of period (in shares)								22.2									22.2
Granted (in shares)																	9.4
Vested (in shares)																	(8.3)
Canceled (in shares)																	(3.1)
Balance at end of period (in shares)					20.2				22.2								20.2	22.2
Vested and expected-to-vest RSUs, RSAs and PSAs, number of shares at (in shares)					16.6												16.6
Weighted Average Grant-Date Fair Value per Share
Balance at beginning of period (in dollars per share)								$ 24.55									$ 24.55
Granted (in dollars per share)																	29.62
Vested (in dollars per share)																	24.44
Canceled (in dollars per share)																	25.76
Balance at end of period (in dollars per share)					$ 26.78				$ 24.55								26.78	$ 24.55
Vested and expected-to-vest RSUs, RSAs and PSA, Weighted Average Grant-Date Fair Value (in dollars per share)																	$ 27.28
Weighted Average Remaining Contractual Term (In Years)																	1 year 2 months 12 days
Vested and expected to vest RSUs, RSAs, and PSAs, Weighted Average Remaining Contractual Term (In Years)																	1 year 2 months 12 days
Aggregate Intrinsic Value					$ 646.6												$ 646.6
Vested and expected-to-vest RSUs, RSAs and PSA, Aggregate Intrinsic Value																	$ 531.5
Weighted-average grant-date fair value, RSUs, RSAs, PSUs granted, assumed or substituted (in dollars per share)																	$ 29.62	$ 26.21	$ 21.59
Fair value of RSUs, RSAs and PSAs																	$ 202.2	$ 184.2	$ 174.7
Service-based RSUs
Number of Shares
Granted (in shares)																	7.8
Marked-based RSUs
Number of Shares
Granted (in shares)																	0.4

Employee Benefit Plans - Shares

Employee Benefit Plans - Shares Available For Grant (Details) - shares	1 Months Ended		12 Months Ended
	May 31, 2019	May 31, 2017	Dec. 31, 2022
Restricted Stock Units (RSU) and Restricted Stock
Number of Shares
Shares authorized per unit, lower than hundred percent of fair value (in shares)	2
Performance Shares (PSAs)
Number of Shares
Shares authorized per unit, lower than hundred percent of fair value (in shares)	0.1
Equity Incentive Plan 2015
Number of Shares
Balance as of beginning of period (in shares)			5,100,000
Additional shares authorized (in shares)	3,700,000	23,000,000	4,500,000
RSUs and PSAs granted (in shares)			(9,000,000)
RSUs and PSAs canceled (in shares)			2,800,000
Balance as of end of period (in shares)			3,400,000
Canceled shares returned to the share reserve (in shares)			900,000

Employee Benefit Plans - Employ

Employee Benefit Plans - Employee Stock Purchase Plan and Valuation Assumptions (Details) - $ / shares shares in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
ESPP Purchase Rights
Estimates of Fair Value
Volatility	29%	32%	31%
Risk-free interest rate	1.10%	0.10%	0.80%
Expected life (years)	1 year 3 months 18 days	1 year 3 months 18 days	1 year 3 months 18 days
Dividend yield	2.50%	3%	3.30%
Weighted-average fair value per share (in dollars per share)	$ 8.84	$ 6.96	$ 6.34
Market-based RSUs
Estimates of Fair Value
Volatility	30%	30%	25%
Risk-free interest rate	1.70%	0.20%	1.30%
Dividend yield	2.50%	3.40%	3.30%
Weighted-average fair value per share (in dollars per share)	$ 47.96	$ 30.70	$ 26.32
Employee Stock Purchase Plan 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common shares purchased through ESPP (in shares)	2.6	2.8	2.7
Average exercise price of shares purchased through ESPP (in dollars per share)	$ 21.59	$ 19.81	$ 19.59

Employee Benefit Plans - Share-

Employee Benefit Plans - Share-Based Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	$ 209.3	$ 222.6	$ 189.6
Stock options
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	5.4	9.3	7.3
RSUs, RSAs, and PSAs
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	181.9	196.2	162.6
ESPP Purchase Rights
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	22	17.1	19.7
Cost of revenues - Product
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	5.9	5.3	5.4
Cost of revenues - Service
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	17.4	18.2	15.8
Research and development
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	84	93.1	78.8
Sales and marketing
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	59.1	65.9	58.2
General and administrative
Stock Based Compensation Expense Recorded in Cost and Expense Categories
Share-based compensation expense	$ 42.9	$ 40.1	$ 31.4

Employee Benefit Plans - Shar_2

Employee Benefit Plans - Share-Based Compensation Expense Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-Based Payment Arrangement [Abstract]
Company recognized tax benefits on total stock-based compensation expense	$ 25.7	$ 28.2	$ 23.5
Tax benefit realized related to awards vested or exercised during the period	38.6	$ 31.7	$ 21.7
Unrecognized compensation cost	$ 362.2
Weighted average period that unrecognized compensation cost will be recognized	1 year 7 months 6 days

Employee Benefit Plans - 401(k)

Employee Benefit Plans - 401(k) plan, Deferred Compensation Plan and Non-US Pension Plans (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Employee Benefit Textuals [Abstract]
Employee contribution matched	30%
Matching contributions to plan	$ 23.5	$ 22.3	$ 22
NQDC
Employee Benefit Textuals [Abstract]
Deferred compensation liability	28.1	33.3
Investment	28.1	33.3
Other accrued liabilities | NQDC
Employee Benefit Textuals [Abstract]
Deferred compensation liability	2.4	4.4
Other long-term liabilities | NQDC
Employee Benefit Textuals [Abstract]
Deferred compensation liability	25.7	28.9
Inventory | NQDC
Employee Benefit Textuals [Abstract]
Investment	2.4	4.4
Other long-term assets | NQDC
Employee Benefit Textuals [Abstract]
Investment	$ 25.7	$ 28.9

Segments - Revenue by Product (

Segments - Revenue by Product (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	1
Net revenues	$ 5,301.2	$ 4,735.4	$ 4,445.1
Automated WAN Solutions
Segment Reporting Information [Line Items]
Net revenues	1,865.3	1,665	1,622.2
Cloud-Ready Data Center
Segment Reporting Information [Line Items]
Net revenues	878.9	727.1	677.1
AI-Driven Enterprise
Segment Reporting Information [Line Items]
Net revenues	1,026.2	830.4	656.2
Hardware Maintenance and Professional Services
Segment Reporting Information [Line Items]
Net revenues	$ 1,530.8	$ 1,512.9	$ 1,489.6

Segments - Revenue (Details)

Segments - Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Revenues [Abstract]
Net revenues	$ 5,301.2	$ 4,735.4	$ 4,445.1
Cloud
Net Revenues [Abstract]
Net revenues	1,393.6	1,228	1,081.2
Service Provider
Net Revenues [Abstract]
Net revenues	1,891.2	1,839.1	1,761.7
Enterprise
Net Revenues [Abstract]
Net revenues	$ 2,016.4	$ 1,668.3	$ 1,602.2

Segments - Geographical (Detail

Segments - Geographical (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Net Revenues by Geographic Region [Line Items]
Net revenues	$ 5,301.2	$ 4,735.4	$ 4,445.1
Property and equipment, net	666.8	703
Total Americas
Net Revenues by Geographic Region [Line Items]
Net revenues	3,156.8	2,649.1	2,445.1
United States
Net Revenues by Geographic Region [Line Items]
Net revenues	2,931.6	2,426.9	2,233.9
Property and equipment, net	579.3	623.4
Other
Net Revenues by Geographic Region [Line Items]
Net revenues	225.2	222.2	211.2
Europe, Middle East, and Africa
Net Revenues by Geographic Region [Line Items]
Net revenues	1,370	1,314.5	1,233.8
Asia Pacific
Net Revenues by Geographic Region [Line Items]
Net revenues	774.4	771.8	$ 766.2
International
Net Revenues by Geographic Region [Line Items]
Property and equipment, net	$ 87.5	$ 79.6

Income Taxes - Components of Pr

Income Taxes - Components of Pretax Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Components of income before provision for income taxes and noncontrolling interest
Domestic	$ 509.5	$ 264.6	$ 204.2
Foreign	26.8	45.5	61
Income before income taxes and loss from equity method investment	536.3	310.1	265.2
Current provision (benefit):
Federal	223.6	63.4	73.4
States	23.9	15.9	20.3
Foreign	36.2	48.2	(21.6)
Total current provision (benefit)	283.7	127.5	72.1
Deferred (benefit) provision:
Federal	(199.3)	(54.3)	(58.7)
States	(13.6)	(4.1)	(6.6)
Foreign	(10.3)	(11.7)	0.6
Total deferred (benefit) provision	(223.2)	(70.1)	(64.7)
Total provision for income taxes	60.5	57.4	7.4
Income tax reconciliation
Expected provision at statutory rate	112.7	65.1	55.7
State taxes, net of federal benefit	12	6.5	8.7
Foreign income at different tax rates	(18.1)	(0.2)	(5.9)
R&D tax credits	(23.6)	(16.6)	(16.4)
Share-based compensation	(7.4)	(2.2)	9
Non-deductible compensation	4	4.2	3.5
Temporary differences not currently benefited	0	0	(0.9)
Recognition of previously unrecognized tax benefits	(8.1)	0	(63.7)
Cost sharing adjustment - Altera	0	0	20.1
Other	(11)	0.6	(2.7)
Total provision for income taxes	$ 60.5	$ 57.4	$ 7.4

Income Taxes - Narrative (Detai

Income Taxes - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Income Tax Contingency [Line Items]
Recognition of previously unrecognized tax benefits	$ 8.1	$ 0	$ 63.7
Cost sharing adjustment - Altera	0	0	20.1
Valuation allowance	310.9	300.9
Increase (decrease) in DTA valuation allowance	10	39.4
Undistributed earnings of foreign subsidiaries	118.1
Additional income tax expense related to undistributed earnings	23.9
Unrecognized tax benefits	116	113.4	116	$ 151.3
Unrecognized tax benefits that would impact effective tax rate	111.7
Unrecognized tax benefits, penalties and interest	(2.5)	2.7	(20.7)
Reductions in unrecognized tax benefits (up to)	2.5	3.6	52
Minimum
Income Tax Contingency [Line Items]
Reductions in unrecognized tax benefits (up to)	1
Other long-term liabilities
Income Tax Contingency [Line Items]
Interest and penalties accrued related to unrecognized tax benefits	5.6	$ 8.1	$ 5.3
Federal
Income Tax Contingency [Line Items]
Valuation allowance	1.7
Net operating loss carry-forwards	150
Tax credit carry-forwards	2.4
State and Local Jurisdiction
Income Tax Contingency [Line Items]
Valuation allowance	297.8
State and Local Jurisdiction | CALIFORNIA
Income Tax Contingency [Line Items]
Net operating loss carry-forwards	129.1
State and Local Jurisdiction | Other States
Income Tax Contingency [Line Items]
Net operating loss carry-forwards	138.8
Tax credit carry-forwards	34.2
Foreign Tax Authority
Income Tax Contingency [Line Items]
Valuation allowance	11.5
California Deferred Tax Assets | State and Local Jurisdiction
Income Tax Contingency [Line Items]
Net operating loss carry-forwards	129.1
Tax credit carry-forwards	$ 308.6

Income Taxes - Deferred Taxes (

Income Taxes - Deferred Taxes (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Net operating loss carry-forwards	$ 57.2	$ 72.5
Research and other credit carry-forwards	281.3	272.2
Deferred revenue	58.1	47.7
Share-based compensation	17.2	17.9
Capitalized R&D expenditure	293.1	102
Reserves and accruals not currently deductible	66.1	61
Operating lease liabilities	39.7	45.4
Other	13.2	9.9
Total deferred tax assets	825.9	628.6
Valuation allowance	(310.9)	(300.9)
Deferred tax assets, net of valuation allowance	515	327.7
Deferred tax liabilities:
Property and equipment basis differences	0	(1.3)
Purchased intangible assets	(32.3)	(56.5)
Unremitted foreign earnings	(23.7)	(25.5)
Net unrealized gain	(35.8)	(21)
Operating lease assets	(36.1)	(39.9)
Total deferred tax liabilities	(127.9)	(144.2)
Net deferred tax assets	$ 387.1	$ 183.5

Income Taxes - Income Tax Conti

Income Taxes - Income Tax Contingencies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of year	$ 113.4	$ 116	$ 151.3
Tax positions related to current year:
Additions	5.8	7.7	5.3
Tax positions related to prior years:
Additions	6.9	3.3	18.1
Reductions	(2.5)	(3.6)	(52)
Settlements	0	(9.4)	(1.8)
Lapses in statutes of limitations	(7.6)	(0.6)	(4.9)
Balance at end of year	$ 116	$ 113.4	$ 116

Net Income per Share (Details)

Net Income per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator:
Net income	$ 471	$ 252.7	$ 257.8
Denominator:
Weighted-average shares used to compute basic net income per share (in shares)	322.1	324.4	330.4
Dilutive effect of employee stock awards (in shares)	7.4	7.2	4.8
Weighted-average shares used to compute diluted net income per share (in shares)	329.5	331.6	335.2
Net income per share:
Basic (in dollars per share)	$ 1.46	$ 0.78	$ 0.78
Diluted (in dollars per share)	$ 1.43	$ 0.76	$ 0.77
Anti-dilutive shares (in shares)	3.4	0.5	5.3

Commitments and Contingencies -

Commitments and Contingencies - Unconditional Purchase Obligations (Details) $ in Millions	Dec. 31, 2022 USD ($)
Purchase Commitments
2023	$ 2,101.1
2024	134.9
2025	75.3
2026	80
2027	85
Total	2,476.3
Unconditional Purchase Obligations
2023	48.4
2024	36.3
2025	9.7
2026	2
2027	0.4
Total	$ 96.8

Commitments and Contingencies_2

Commitments and Contingencies - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Guarantor Obligations [Line Items]
Accrued estimated carrying charges	$ 21.5
Long-term debt	1,601.3	$ 1,686.8
Income taxes payable	250.6
Unrecognized tax benefits	$ 116	113.4	$ 116	$ 151.3
Tax refund, period of recognition	8 years
Long-Term Income Taxes
Guarantor Obligations [Line Items]
Income taxes payable	$ 198.4
Indemnification Agreement
Guarantor Obligations [Line Items]
Guarantor obligations, current carrying value	0.7	1.9
Financing Guarantees, Bank Guarantees, and Standby Letters of Credit
Guarantor Obligations [Line Items]
Guarantor obligations, current carrying value	27.4	$ 2.4
Master Service Agreement
Guarantor Obligations [Line Items]
Expected payment	$ 94.2
Facilities | Minimum
Guarantor Obligations [Line Items]
Lease term	1 year
Facilities | Maximum
Guarantor Obligations [Line Items]
Lease term	9 years
Equipment | Minimum
Guarantor Obligations [Line Items]
Lease term	1 year
Equipment | Maximum
Guarantor Obligations [Line Items]
Lease term	4 years
Long-term Income Taxes
Guarantor Obligations [Line Items]
Unrecognized tax benefits	$ 81

Commitments and Contingencies_3

Commitments and Contingencies - Lease Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 48.4	$ 57.4
Variable lease cost	10	11.5
Total lease cost	58.4	68.9
Operating cash outflows from operating leases	53.1	57.8
ROU assets obtained in exchange for new operating lease liabilities	$ 26	$ 29.7
Weighted average remaining lease term (years)	4 years 1 month 6 days	4 years 7 months 6 days
Weighted average discount rate	3.50%	3.30%

Commitments and Contingencies_4

Commitments and Contingencies - Future Operating Lease Payments (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Amount
2023	$ 48.7
2024	48.3
2025	39.3
2026	18.5
2027	11.2
Thereafter	11.3
Total lease payments	177.3
Less: interest	(12.2)
Total	165.1
Balance Sheet Information
Other accrued liabilities	47.4
Long-term operating lease liabilities	117.7	$ 142.2
Lease payments for a lease signed but not yet commenced	$ 83.9

Subsequent Events (Details)

Subsequent Events (Details) - USD ($) $ / shares in Units, shares in Millions							1 Months Ended	3 Months Ended												12 Months Ended
	Mar. 22, 2023	Jan. 31, 2023	Oct. 25, 2022	Jul. 26, 2022	Apr. 26, 2022	Jan. 27, 2022	Feb. 10, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Subsequent Event [Line Items]
Cash dividends declared per share of common stock (in dollars per share)								$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20
Payments of cash dividends (in dollars per share)			$ 0.21	$ 0.21	$ 0.21	$ 0.21		$ 0.21	$ 0.21	$ 0.21	$ 0.21	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.20	$ 0.84	$ 0.80	$ 0.80
Amount																				$ 315,200,000	$ 443,500,000	$ 421,100,000
Forecast
Subsequent Event [Line Items]
Payments of cash dividends (in dollars per share)	$ 0.22
Stock Repurchase Program 2018
Subsequent Event [Line Items]
Stock repurchased (in shares)																				9.2
Amount																				$ 299,700,000	$ 433,300,000	$ 375,000,000
Repurchase and retirement of common stock (in shares)																				9.2	15.7	17.9
Stock repurchase program, authorized funds remaining								$ 600,000,000												$ 600,000,000
Subsequent Event
Subsequent Event [Line Items]
Cash dividends declared per share of common stock (in dollars per share)		$ 0.22
Subsequent Event | Stock Repurchase Program 2018
Subsequent Event [Line Items]
Stock repurchased (in shares)							2
Amount							$ 63,000,000
Price paid per share (in dollars per share)							$ 30.98
Repurchase and retirement of common stock (in shares)							1.4
Stock repurchase program, authorized funds remaining							$ 500,000,000

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Account - Allowance for Doubtful Accounts (Details) - Allowance for Doubtful Accounts - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 6.7	$ 9.9	$ 5.5
Charged to (Reversed from) Costs and Expenses	5.3	(3.2)	4.4
Write-offs, Net of Recoveries	0	0	0
Balance at End of Year	$ 12	$ 6.7	$ 9.9

Schedule_II_- Valuation and Qua

Schedule II - Valuation and Qualifying Account - Sales Return Reserve (Details) - Sales Return Reserve - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 31.4	$ 28.4	$ 24.8
Provision for Returns / Stock Rotation	111.9	57.6	60.7
Returns / Stock Rotation	(100.3)	(54.6)	(57.1)
Balance at End of Year	$ 43	$ 31.4	$ 28.4