Organization and Summary of Significant Accounting Policies	12 Months Ended
Dec. 31, 2022
Accounting Policies [Abstract]
Organization and Summary of Significant Accounting Policies	Organization and summary of significant accounting policies Organization The Company's operations are comprised of its dialysis and related lab services to patients in the United States (its U.S. dialysis business), its U.S. integrated kidney care (IKC) business, its U.S. other ancillary services and its international operations (collectively, its ancillary services), as well as its corporate administrative support. The Company’s largest line of business is its U.S. dialysis business, which operates kidney dialysis centers in the U.S. for patients suffering from chronic kidney failure, also known as end stage renal disease or end stage kidney disease (ESRD or ESKD). As of December 31, 2022, the Company operated or provided administrative services through a network of 2,724 U.S. outpatient dialysis centers in 46 states and the District of Columbia, serving a total of approximately 199,400 patients. In addition, as of December 31, 2022, the Company operated or provided administrative services to a total of 350 outpatient dialysis centers serving approximately 45,600 patients located in 11 countries outside of the U.S. On June 19, 2019, the Company completed the sale of its prior DaVita Medical Group (DMG) business to Collaborative Care Holdings, LLC (Optum), a subsidiary of UnitedHealth Group Inc. The effects of the DMG sale on the Company's consolidated financial statements have been reported in discontinued operations for all periods presented. For information on how the DMG sale has affected these results, see Note 22. The Company’s U.S. dialysis and related lab services business qualifies as a separately reportable segment, and all other operating segments have been combined and disclosed in the other segments category. Basis of presentation These consolidated financial statements are prepared in accordance with United States generally accepted accounting principles (U.S. GAAP). The financial statements include DaVita Inc. and its subsidiaries, partnerships and other entities in which it maintains a majority voting or other controlling financial interest (collectively, the Company). All significant intercompany transactions and balances have been eliminated. Equity investments in investees over which the Company has significant influence are recorded on the equity method, while investments in other equity securities are recorded at fair value or on the adjusted cost method, as applicable. For the Company’s international subsidiaries, local currencies are considered their functional currencies. Translation adjustments result from translating the financial statements of the Company’s international subsidiaries from their functional currencies into the Company’s reporting currency (the U.S. dollar, or USD). Prior year classifications have been conformed to the current year presentation. The Company has evaluated subsequent events through the date these consolidated financial statements were issued and has included all necessary adjustments and disclosures. Use of estimates The preparation of financial statements in conformity with U.S. GAAP requires the use of estimates and assumptions that affect the reported amounts of revenues, expenses, assets, liabilities, contingencies and noncontrolling interests subject to put provisions. Although actual results in subsequent periods will differ from these estimates, such estimates are developed based on the best information available to management and management’s best judgments at the time. All significant assumptions and estimates underlying the amounts reported in the financial statements and accompanying notes are regularly reviewed and updated when necessary. Changes in estimates are reflected in the financial statements based upon on-going actual experience trends or subsequent settlements and realizations depending on the nature and predictability of the estimates and contingencies. The most significant assumptions and estimates underlying these consolidated financial statements and accompanying notes involve revenue recognition and accounts receivable, impairments of goodwill, accounting for income taxes, certain fair value estimates and loss contingencies. Specific estimating risks and contingencies are further addressed within these notes to the consolidated financial statements. Revenues Dialysis patient service revenues Revenues are recognized based on the Company’s estimate of the transaction price the Company expects to collect as a result of satisfying its performance obligations. Dialysis patient service revenues are recognized in the period services are provided based on these estimates. Revenues consist primarily of payments from government and commercial health plans for dialysis services provided to patients. The Company maintains a usual and customary fee schedule for its dialysis treatments and related lab services; however, actual collectible revenue is normally recognized at a discount from this fee schedule. Revenues associated with Medicare and Medicaid programs are estimated based on: (a) the payment rates that are established by statute or regulation for the portion of payment rates paid by the government payor (e.g., 80% for Medicare patients) and (b) for the portion not paid by the primary government payor, estimates of the amounts ultimately collectible from other government programs providing secondary coverage (e.g., Medicaid secondary coverage), the patient’s commercial health plan secondary coverage, or the patient. Under Medicare’s bundled payment rate system, services covered by Medicare are subject to estimating risk, whereby reimbursements from Medicare can vary significantly depending upon certain patient characteristics and other variable factors. Even with the bundled payment rate system, Medicare payments for bad debt claims as established by cost reports require evidence of collection efforts. As a result, billing and collection of Medicare bad debt claims can be delayed significantly and final payment is subject to audit. The Company’s revenue recognition is estimated based on its judgment regarding its ability to collect, which depends upon its ability to effectively capture, document and bill for Medicare’s base payment rate as well as these other variable factors. Medicare Advantage revenues are reimbursed at negotiated contract rates that are generally higher than Medicare fee-for-service rates, but which generally have a slower payment frequency than Medicare fee-for-service payments, and some of which are subject to certain quality or performance adjustments. Medicare Advantage revenues are subject to meaningful estimating risk based on factors similar to those described for commercial health plans below. Medicaid payments, when Medicaid coverage is secondary, can also be difficult to estimate. For many states, Medicaid payment terms and methods differ from Medicare, and may prevent accurate estimation of individual payment amounts prior to billing. Revenues associated with commercial health plans are estimated based on contractual terms for the patients under healthcare plans with which the Company has formal agreements, non-contracted health plan coverage terms if known, estimated secondary collections, historical collection experience, historical trends of refunds and payor payment adjustments (retractions), inefficiencies in the Company’s billing and collection processes that can result in denied claims for payments, delays in collections due to payor payment inefficiencies, and regulatory compliance matters. Commercial revenue recognition also involves significant estimating risks. With many larger commercial insurers, the Company has several different contracts and payment arrangements, and these contracts often include only a subset of the Company’s centers. Some of our commercial revenue contracts are also subject to certain quality or performance adjustments. In certain circumstances, it may not be possible to determine which contract, if any, should be applied prior to billing. In addition, for services provided by non-contracted centers, final collection may require specific negotiation of a payment amount, typically at a significant discount from the Company’s usual and customary rates. Other revenues Other revenues consist of revenues earned by the Company's non-dialysis ancillary services as well as fees for management and administrative services to outpatient dialysis businesses that the Company does not consolidate. Other revenues are estimated in the period services are provided. The Company's IKC revenues include revenues earned under risk-based arrangements, including value-based care (VBC) arrangements. Under its VBC arrangements, the Company assumes full or shared financial risk for the total medical cost of care for patients below or above a benchmark. The benchmarks against which the Company incurs profit or loss on these contracts are typically based on the underlying premiums paid to the insuring entity (the Company's counterparty), with adjustments where applicable, or on trended and adjusted medical cost targets. For some of the Company's risk-based arrangements (such as its special needs plans), the Company acts as a principal with respect to all medical services provided to the patient by effectively hosting or sponsoring the entire arrangement, and as a result recognizes revenue and expense for all medical services provided to covered patients. However, for most of its VBC arrangements, the Company provides health monitoring and care coordination services to patients but does not control or direct the medical services that patients receive from third party providers. As a result, for most of its VBC arrangements the Company does not include third party medical costs in its reported revenues and expenses, but rather recognizes revenue only for the estimated amount of shared savings or shared losses or related revenues that are directly earned or incurred by the Company, and ultimately paid to or by the Company, under the arrangement. Other income Other income includes interest income on cash and cash equivalents and short- and long-term investments, realized and unrealized gains and losses recognized on investments, impairments on investments, and foreign currency transaction gains and losses. Cash and cash equivalents Cash equivalents are short-term highly liquid investments readily convertible to known amounts of cash that typically mature within three months or less at date of purchase. Restricted cash and equivalents Restricted cash and cash equivalents include funds held in trust to satisfy insurer and state regulatory requirements related to wholly-owned captive insurance companies that bear professional and general liability and workers' compensation risks for the Company as well as funds held in escrow. See Note 4 for further details. Investments in debt and equity securities The Company classifies certain debt securities as held-to-maturity and records them at amortized cost based on the Company’s intentions and strategies concerning those investments. Equity securities that have readily determinable fair values or redemption values are recorded at estimated fair value with changes in fair value recognized in current earnings within other income. These debt and equity investments are classified as short-term investments or long-term investments on the Company's consolidated balance sheet. See Note 5 for further details. Inventories Inventories are stated at the lower of cost (first-in, first-out) or net realizable value and consist principally of pharmaceuticals and dialysis-related supplies. Rebates related to inventory purchases are recorded when earned and are based on certain qualification requirements which are dependent on a variety of factors including future pricing levels and purchase volume levels from the manufacturer and related data submission. Property and equipment Property and equipment is stated at cost less accumulated depreciation and amortization and is further reduced by any impairments. Maintenance and repairs are charged to expense as incurred. Property and equipment assets are reviewed for possible impairment whenever significant events or changes in circumstances indicate that an impairment may have occurred. Property and equipment impairment assessments are performed at a location or market level, as applicable, based on the specific cash flows they support or protect. If the Company commits to a plan to dispose of a long-lived asset before the end of its previously estimated useful life, cash flow estimates are revised accordingly, and the Company records an asset impairment, if applicable, or accelerates depreciation over the revised estimated useful life. Upon sale or retirement of long-lived assets, the cost and related accumulated depreciation or amortization are removed from the balance sheet and any resulting gain or loss is included in current operating expenses. Leases The Company leases substantially all of its U.S. dialysis facilities. The majority of the Company’s facilities are leased under non-cancellable operating leases which contain renewal options. These renewal options are included in the Company's determination of the right-of-use assets and related lease liabilities when renewal is considered reasonably certain at the commencement date.The Company's leases are generally subject to fixed escalation clauses or contain consumer price index increases. The Company categorizes leases with contractual terms longer than twelve months as either operating or finance leases. Finance leases are generally those leases that allow the Company to substantially utilize or pay for the entire asset over its estimated life. All other leases are categorized as operating leases. The Company has elected the practical expedient to not separate lease components from non-lease components for its financing and operating leases. For short-term leases with a term of less than 12 months, the Company does not recognize right-of-use assets or lease liabilities and instead recognizes short-term lease costs as rent expense directly as incurred. Financing and operating lease liabilities are measured at the net present value of lease payments over the lease term as of the commencement date. Since most of the Company's leases do not provide an implicit rate of return, the Company uses its incremental borrowing rate based on information available at the commencement date or remeasurement date in determining the present value of lease payments. Assets acquired under finance leases are recorded on the balance sheet within property and equipment, net and liabilities for finance lease obligations are recorded within long-term debt. Finance lease assets are amortized to depreciation expense on a straight-line basis over the shorter of their estimated useful lives or the expected lease term. Accretion of interest on finance lease liabilities is included in debt expense. Rights to use assets under operating leases are recorded on the balance sheet as operating lease right-of-use assets and liabilities for operating lease obligations are recorded as operating lease liabilities. Both amortization of operating lease right-of-use assets, and interest accretion on operating lease liabilities, are recorded to rent expense over the lease term. Rent expenses are included in patient care costs or general and administrative expense, as applicable, based on the business unit or corporate function for which the space is leased. Amortizable intangibles Amortizable intangible assets include noncompetition agreements, hospital service contracts, and customer relationships arising from other service contracts, each of which have finite useful lives. Amortization expense is computed using the straight-line method over the useful lives of the assets estimated as follows: noncompetition agreements and hospital acute service contracts over the contract term, and customer relationships from other service contracts over the remaining contract term plus expected renewal periods. Amortizable intangible assets are reviewed for possible impairment whenever significant events or changes in circumstances indicate that an impairment may have occurred. Amortizable intangible asset impairment assessments are performed on a location, market or business unit basis, as applicable, based on the specific cash flows they support or protect. Indefinite-lived intangibles Indefinite-lived intangible assets include international licenses and accreditations that allow the Company to be reimbursed for providing dialysis services to patients, each of which has an indefinite useful life. Indefinite-lived intangibles are not amortized, but are assessed for impairment at least annually and whenever significant events or changes in circumstances indicate that an impairment may have occurred. Costs to renew indefinite-lived intangible assets are expensed as incurred. Equity method and other investments Equity investments that do not have readily determinable fair values are carried on the equity method if the Company maintains significant influence over the investee unless the fair value option is elected. Equity investments without readily determinable fair values for which the Company does not maintain significant influence over the investee are carried either on the adjusted cost method or at estimated fair value, as determined on an investment-specific basis. The adjusted cost method represents the Company's cost for an investment, net of any impairments, as adjusted for any subsequent observable price changes. These equity investments are classified as equity method and other investments on the Company's consolidated balance sheet. See Note 9 for further details. Equity method investments are assessed for other-than-temporary impairment when significant events or changes in circumstances indicate that an other-than-temporary impairment may have occurred. An other-than-temporary impairment charge is recorded when the fair value of an investment has fallen below its carrying amount and the shortfall is expected to be indefinitely or permanently unrecoverable. Income and expense from nonconsolidated dialysis partnerships accounted for as equity method investments are recorded within equity investment income, net. For ownership interests accounted for as equity method investments other than dialysis partnerships, income and expense are included on up to a one quarter lag in other (loss) income, net. Goodwill Goodwill represents the difference between the fair value of businesses acquired and the fair value of the identifiable tangible and intangible net assets acquired. Goodwill is not amortized, but is assessed by individual reporting unit for impairment as circumstances warrant and at least annually. An impairment charge is recognized when and to the extent a reporting unit's carrying amount is determined to exceed its fair value. The Company operates multiple reporting units. See Note 10 for further details. Self-insurance The Company predominantly self-insures its professional and general liability, workers' compensation and automobile risks, and a portion of its employment liability practice risks, through its wholly-owned captive insurance companies, with excess or reinsurance coverage for additional protection. The Company is also predominantly self-insured with respect to employee medical and other health benefits. The Company records insurance liabilities for the professional and general liability, workers’ compensation, automobile, employee health benefit and portion of employment liability practice risks that it retains and estimates its liability for those risks using third party actuarial calculations that are based upon historical claims experience and expectations for future claims. Income taxes Federal, state and foreign income taxes are computed at currently enacted tax rates less tax credits using the asset and liability method. Deferred taxes are adjusted both for items that do not currently have tax consequences and for the cumulative effect of any changes in tax rates from those previously used to determine deferred tax assets or liabilities. Tax provisions include amounts that are currently payable, changes in deferred tax assets and liabilities that arise because of temporary differences between the timing of when items of income and expense are recognized for financial reporting and income tax purposes, changes in the recognition of tax positions and any changes in the valuation allowance caused by a change in judgment about the realizability of the related deferred tax assets. A valuation allowance is established when necessary to reduce deferred tax assets to amounts expected to be realized. The Company uses a recognition threshold of more-likely-than-not and a measurement attribute on all tax positions taken or expected to be taken in a tax return in order to be recognized in the financial statements. Once the recognition threshold is met, the tax position is then measured to determine the actual amount of benefit to recognize in the financial statements. Stock-based compensation The Company’s stock-based compensation expense for stock-settled awards is measured at the estimated fair value of awards on the date of grant and recognized on a cumulative straight-line basis over the vesting terms of the awards, unless the stock awards are based on non-market-based performance metrics, in which case expense is adjusted for the ultimate number of shares expected to be issued as of the end of each reporting period. Stock-based compensation expense for cash-settled awards is based on their estimated fair values as of the end of each reporting period. The expense for all stock-based awards is recognized net of expected forfeitures. Stock-based compensation to be settled in shares is recorded to the Company’s shareholders’ contributed capital, while stock-based compensation to be settled in cash is recorded as a liability. Shares issued upon exercise or, when applicable, vesting of stock awards, are issued from authorized but unissued shares. Interest rate cap agreements The Company often carries a combination of current or forward interest rate caps on portions of its variable rate debt as a means of hedging its exposure to changes in LIBOR interest rates as part of its overall interest rate risk management strategy. These interest rate caps are not held for trading or speculative purposes and are designated as qualifying cash flow hedges. See Note 13 for further details. Noncontrolling interests Noncontrolling interests represent third-party equity ownership interests in entities which are consolidated by the Company for financial statement reporting purposes. As of December 31, 2022, third parties held noncontrolling equity interests in 689 consolidated legal entities. Fair value estimates Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are determined based on the principal or most advantageous market for the item being measured, assume that buyers and sellers are independent, willing and able to transact, and knowledgeable, with access to all information customarily available in such a transaction, and are based on assumptions that market participants would use in pricing the item, not assumptions specific to the reporting entity. The criticality of a particular fair value estimate to the Company's consolidated financial statements depends upon the nature and size of the item being measured, the extent of uncertainties involved and the nature and magnitude or potential effect of assumptions and judgments required. Certain fair value estimates can involve significant uncertainties and require significant judgment on various matters, some of which could be subject to reasonable disagreement. See Note 24 for further details. The Company relies on fair value measurements and estimates for purposes that require the recording, reassessment, or adjustment of the carrying amounts of certain assets, liabilities, and noncontrolling interests subject to put provisions (redeemable equity interests classified as temporary equity). These purposes can include the accounting for business combination transactions; impairment assessments for goodwill, other intangible assets, or other long-lived assets; recurrent revaluation of investments in debt and equity securities, contingent earn-out obligations, interest rate cap agreements, and noncontrolling interests subject to put provisions; and the accounting for equity method and other investments and stock-based compensation, as applicable. The Company has classified its assets, liabilities and temporary equity into the fair value hierarchy levels defined by the Financial Accounting Standards Board (FASB) reflecting their differing degrees of uncertainty. See Note 24 for further details. New accounting standards New standards not yet adopted In March 2020, the FASB issued Accounting Standards Update (ASU) No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (ASU 2020-04). ASU 2020-04 provides optional expedients and exceptions for applying U.S. GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another rate that is expected to be discontinued. The amendments in this ASU were effective beginning on March 12, 2020, and the Company could elect to apply the amendments prospectively through December 31, 2022. In December 2022, the FASB issued ASU No. 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848, which extends the election date to December 31, 2024. Effective January 1, 2022 certain LIBOR tenors that do not affect the Company, including the one-week and two-month U.S. dollar LIBOR rate, ceased or became non-representative. The remaining U.S. dollar LIBOR tenors will cease or become non-representative effective July 1, 2023. This change will have no impact on the Company's ability to borrow. The Company is currently assessing the other effects this guidance may have on its consolidated financial statements. In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Acquired Contract Assets and Contract Liabilities (ASU 2021-08). ASU 2021-08 requires application of ASC 606, Revenue from Contracts with Customers, to recognize and measure assets and liabilities from contracts with customers acquired in a business combination. This ASU creates an exception to the general recognition and measurement principle in ASC 805 and will result in recognition of contract assets and contract liabilities consistent with those recorded by the acquiree immediately before the acquisition date. ASU 2021-08 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is permitted for all entities. The Company does not expect the adoption of this standard to have a material impact on its consolidated financial statements.

The Company's operations are comprised of its dialysis and related lab services to patients in the United States (its U.S. dialysis business), its U.S. integrated kidney care (IKC) business, its U.S. other ancillary services and its international operations (collectively, its ancillary services), as well as its corporate administrative support.

The Company’s largest line of business is its U.S. dialysis business, which operates kidney dialysis centers in the U.S. for patients suffering from chronic kidney failure, also known as end stage renal disease or end stage kidney disease (ESRD or ESKD). As of December 31, 2022, the Company operated or provided administrative services through a network of 2,724 U.S. outpatient dialysis centers in 46 states and the District of Columbia, serving a total of approximately 199,400 patients. In addition, as of December 31, 2022, the Company operated or provided administrative services to a total of 350 outpatient dialysis centers serving approximately 45,600 patients located in 11 countries outside of the U.S.

On June 19, 2019, the Company completed the sale of its prior DaVita Medical Group (DMG) business to Collaborative Care Holdings, LLC (Optum), a subsidiary of UnitedHealth Group Inc. The effects of the DMG sale on the Company's consolidated financial statements have been reported in discontinued operations for all periods presented. For information on how the DMG sale has affected these results, see Note 22.

These consolidated financial statements are prepared in accordance with United States generally accepted accounting principles (U.S. GAAP). The financial statements include DaVita Inc. and its subsidiaries, partnerships and other entities in which it maintains a majority voting or other controlling financial interest (collectively, the Company). All significant intercompany transactions and balances have been eliminated. Equity investments in investees over which the Company has significant influence are recorded on the equity method, while investments in other equity securities are recorded at fair value or on the adjusted cost method, as applicable. For the Company’s international subsidiaries, local currencies are considered their functional currencies. Translation adjustments result from translating the financial statements of the Company’s international subsidiaries from their functional currencies into the Company’s reporting currency (the U.S. dollar, or USD). Prior year classifications have been conformed to the current year presentation.

The preparation of financial statements in conformity with U.S. GAAP requires the use of estimates and assumptions that affect the reported amounts of revenues, expenses, assets, liabilities, contingencies and noncontrolling interests subject to put provisions. Although actual results in subsequent periods will differ from these estimates, such estimates are developed based on the best information available to management and management’s best judgments at the time. All significant assumptions and estimates underlying the amounts reported in the financial statements and accompanying notes are regularly reviewed and updated when necessary. Changes in estimates are reflected in the financial statements based upon on-going actual experience trends or subsequent settlements and realizations depending on the nature and predictability of the estimates and contingencies.

The most significant assumptions and estimates underlying these consolidated financial statements and accompanying notes involve revenue recognition and accounts receivable, impairments of goodwill, accounting for income taxes, certain fair value estimates and loss contingencies. Specific estimating risks and contingencies are further addressed within these notes to the consolidated financial statements.

provided based on these estimates. Revenues consist primarily of payments from government and commercial health plans for dialysis services provided to patients. The Company maintains a usual and customary fee schedule for its dialysis treatments and related lab services; however, actual collectible revenue is normally recognized at a discount from this fee schedule.

Revenues associated with Medicare and Medicaid programs are estimated based on: (a) the payment rates that are established by statute or regulation for the portion of payment rates paid by the government payor (e.g., 80% for Medicare patients) and (b) for the portion not paid by the primary government payor, estimates of the amounts ultimately collectible from other government programs providing secondary coverage (e.g., Medicaid secondary coverage), the patient’s commercial health plan secondary coverage, or the patient.

Under Medicare’s bundled payment rate system, services covered by Medicare are subject to estimating risk, whereby reimbursements from Medicare can vary significantly depending upon certain patient characteristics and other variable factors. Even with the bundled payment rate system, Medicare payments for bad debt claims as established by cost reports require evidence of collection efforts. As a result, billing and collection of Medicare bad debt claims can be delayed significantly and final payment is subject to audit. The Company’s revenue recognition is estimated based on its judgment regarding its ability to collect, which depends upon its ability to effectively capture, document and bill for Medicare’s base payment rate as well as these other variable factors.

Medicare Advantage revenues are reimbursed at negotiated contract rates that are generally higher than Medicare fee-for-service rates, but which generally have a slower payment frequency than Medicare fee-for-service payments, and some of which are subject to certain quality or performance adjustments. Medicare Advantage revenues are subject to meaningful estimating risk based on factors similar to those described for commercial health plans below.

Revenues associated with commercial health plans are estimated based on contractual terms for the patients under healthcare plans with which the Company has formal agreements, non-contracted health plan coverage terms if known, estimated secondary collections, historical collection experience, historical trends of refunds and payor payment adjustments (retractions), inefficiencies in the Company’s billing and collection processes that can result in denied claims for payments, delays in collections due to payor payment inefficiencies, and regulatory compliance matters.

Commercial revenue recognition also involves significant estimating risks. With many larger commercial insurers, the Company has several different contracts and payment arrangements, and these contracts often include only a subset of the Company’s centers. Some of our commercial revenue contracts are also subject to certain quality or performance adjustments. In certain circumstances, it may not be possible to determine which contract, if any, should be applied prior to billing. In addition, for services provided by non-contracted centers, final collection may require specific negotiation of a payment amount, typically at a significant discount from the Company’s usual and customary rates.

Other revenues consist of revenues earned by the Company's non-dialysis ancillary services as well as fees for management and administrative services to outpatient dialysis businesses that the Company does not consolidate. Other revenues are estimated in the period services are provided.

The Company's IKC revenues include revenues earned under risk-based arrangements, including value-based care (VBC) arrangements. Under its VBC arrangements, the Company assumes full or shared financial risk for the total medical cost of care for patients below or above a benchmark. The benchmarks against which the Company incurs profit or loss on these contracts are typically based on the underlying premiums paid to the insuring entity (the Company's counterparty), with adjustments where applicable, or on trended and adjusted medical cost targets.

For some of the Company's risk-based arrangements (such as its special needs plans), the Company acts as a principal with respect to all medical services provided to the patient by effectively hosting or sponsoring the entire arrangement, and as a result recognizes revenue and expense for all medical services provided to covered patients. However, for most of its VBC arrangements, the Company provides health monitoring and care coordination services to patients but does not control or direct the medical services that patients receive from third party providers. As a result, for most of its VBC arrangements the Company does not include third party medical costs in its reported revenues and expenses, but rather recognizes revenue only for the estimated amount of shared savings or shared losses or related revenues that are directly earned or incurred by the Company, and ultimately paid to or by the Company, under the arrangement.

Other income includes interest income on cash and cash equivalents and short- and long-term investments, realized and unrealized gains and losses recognized on investments, impairments on investments, and foreign currency transaction gains and losses.

Restricted cash and cash equivalents include funds held in trust to satisfy insurer and state regulatory requirements related to wholly-owned captive insurance companies that bear professional and general liability and workers' compensation risks for the Company as well as funds held in escrow. See Note 4 for further details.

The Company classifies certain debt securities as held-to-maturity and records them at amortized cost based on the Company’s intentions and strategies concerning those investments. Equity securities that have readily determinable fair values or redemption values are recorded at estimated fair value with changes in fair value recognized in current earnings within other income. These debt and equity investments are classified as short-term investments or long-term investments on the Company's consolidated balance sheet. See Note 5 for further details.

Inventories are stated at the lower of cost (first-in, first-out) or net realizable value and consist principally of pharmaceuticals and dialysis-related supplies. Rebates related to inventory purchases are recorded when earned and are based on certain qualification requirements which are dependent on a variety of factors including future pricing levels and purchase volume levels from the manufacturer and related data submission.

Property and equipment is stated at cost less accumulated depreciation and amortization and is further reduced by any impairments. Maintenance and repairs are charged to expense as incurred. Property and equipment assets are reviewed for possible impairment whenever significant events or changes in circumstances indicate that an impairment may have occurred. Property and equipment impairment assessments are performed at a location or market level, as applicable, based on the specific cash flows they support or protect. If the Company commits to a plan to dispose of a long-lived asset before the end of its previously estimated useful life, cash flow estimates are revised accordingly, and the Company records an asset impairment, if applicable, or accelerates depreciation over the revised estimated useful life. Upon sale or retirement of long-lived assets, the cost and related accumulated depreciation or amortization are removed from the balance sheet and any resulting gain or loss is included in current operating expenses.

The Company leases substantially all of its U.S. dialysis facilities. The majority of the Company’s facilities are leased under non-cancellable operating leases which contain renewal options. These renewal options are included in the Company's determination of the right-of-use assets and related lease liabilities when renewal is considered reasonably certain at the commencement date.The Company's leases are generally subject to fixed escalation clauses or contain consumer price index increases.

The Company categorizes leases with contractual terms longer than twelve months as either operating or finance leases. Finance leases are generally those leases that allow the Company to substantially utilize or pay for the entire asset over its estimated life. All other leases are categorized as operating leases. The Company has elected the practical expedient to not separate lease components from non-lease components for its financing and operating leases. For short-term leases with a term of less than 12 months, the Company does not recognize right-of-use assets or lease liabilities and instead recognizes short-term lease costs as rent expense directly as incurred.

Assets acquired under finance leases are recorded on the balance sheet within property and equipment, net and liabilities for finance lease obligations are recorded within long-term debt. Finance lease assets are amortized to depreciation expense on a straight-line basis over the shorter of their estimated useful lives or the expected lease term. Accretion of interest on finance lease liabilities is included in debt expense.

Rights to use assets under operating leases are recorded on the balance sheet as operating lease right-of-use assets and liabilities for operating lease obligations are recorded as operating lease liabilities. Both amortization of operating lease right-of-use assets, and interest accretion on operating lease liabilities, are recorded to rent expense over the lease term. Rent expenses are included in patient care costs or general and administrative expense, as applicable, based on the business unit or corporate function for which the space is leased.

Amortizable intangible assets include noncompetition agreements, hospital service contracts, and customer relationships arising from other service contracts, each of which have finite useful lives. Amortization expense is computed using the straight-line method over the useful lives of the assets estimated as follows: noncompetition agreements and hospital acute service contracts over the contract term, and customer relationships from other service contracts over the remaining contract term plus expected renewal periods. Amortizable intangible assets are reviewed for possible impairment whenever significant events or changes in circumstances indicate that an impairment may have occurred. Amortizable intangible asset impairment assessments are performed on a location, market or business unit basis, as applicable, based on the specific cash flows they support or protect.

Indefinite-lived intangible assets include international licenses and accreditations that allow the Company to be reimbursed for providing dialysis services to patients, each of which has an indefinite useful life. Indefinite-lived intangibles are not amortized, but are assessed for impairment at least annually and whenever significant events or changes in circumstances indicate that an impairment may have occurred. Costs to renew indefinite-lived intangible assets are expensed as incurred.

Equity investments that do not have readily determinable fair values are carried on the equity method if the Company maintains significant influence over the investee unless the fair value option is elected. Equity investments without readily determinable fair values for which the Company does not maintain significant influence over the investee are carried either on the adjusted cost method or at estimated fair value, as determined on an investment-specific basis. The adjusted cost method represents the Company's cost for an investment, net of any impairments, as adjusted for any subsequent observable price changes. These equity investments are classified as equity method and other investments on the Company's consolidated balance sheet. See Note 9 for further details.

Equity method investments are assessed for other-than-temporary impairment when significant events or changes in circumstances indicate that an other-than-temporary impairment may have occurred. An other-than-temporary impairment charge is recorded when the fair value of an investment has fallen below its carrying amount and the shortfall is expected to be indefinitely or permanently unrecoverable.

Income and expense from nonconsolidated dialysis partnerships accounted for as equity method investments are recorded within equity investment income, net. For ownership interests accounted for as equity method investments other than dialysis partnerships, income and expense are included on up to a one quarter lag in other (loss) income, net.

Goodwill represents the difference between the fair value of businesses acquired and the fair value of the identifiable tangible and intangible net assets acquired. Goodwill is not amortized, but is assessed by individual reporting unit for impairment as circumstances warrant and at least annually. An impairment charge is recognized when and to the extent a reporting unit's carrying amount is determined to exceed its fair value. The Company operates multiple reporting units. See Note 10 for further details.

The Company predominantly self-insures its professional and general liability, workers' compensation and automobile risks, and a portion of its employment liability practice risks, through its wholly-owned captive insurance companies, with excess or reinsurance coverage for additional protection. The Company is also predominantly self-insured with respect to employee medical and other health benefits. The Company records insurance liabilities for the professional and general liability, workers’ compensation, automobile, employee health benefit and portion of employment liability practice risks that it retains and estimates its liability for those risks using third party actuarial calculations that are based upon historical claims experience and expectations for future claims.

Federal, state and foreign income taxes are computed at currently enacted tax rates less tax credits using the asset and liability method. Deferred taxes are adjusted both for items that do not currently have tax consequences and for the cumulative effect of any changes in tax rates from those previously used to determine deferred tax assets or liabilities. Tax provisions include amounts that are currently payable, changes in deferred tax assets and liabilities that arise because of temporary differences between the timing of when items of income and expense are recognized for financial reporting and income tax purposes, changes in the recognition of tax positions and any changes in the valuation allowance caused by a change in judgment about the realizability of the related deferred tax assets. A valuation allowance is established when necessary to reduce deferred tax assets to amounts expected to be realized.

The Company uses a recognition threshold of more-likely-than-not and a measurement attribute on all tax positions taken or expected to be taken in a tax return in order to be recognized in the financial statements. Once the recognition threshold is met, the tax position is then measured to determine the actual amount of benefit to recognize in the financial statements.

The Company’s stock-based compensation expense for stock-settled awards is measured at the estimated fair value of awards on the date of grant and recognized on a cumulative straight-line basis over the vesting terms of the awards, unless the stock awards are based on non-market-based performance metrics, in which case expense is adjusted for the ultimate number of shares expected to be issued as of the end of each reporting period. Stock-based compensation expense for cash-settled awards is based on their estimated fair values as of the end of each reporting period. The expense for all stock-based awards is recognized net of expected forfeitures.

Stock-based compensation to be settled in shares is recorded to the Company’s shareholders’ contributed capital, while stock-based compensation to be settled in cash is recorded as a liability. Shares issued upon exercise or, when applicable, vesting of stock awards, are issued from authorized but unissued shares.

The Company often carries a combination of current or forward interest rate caps on portions of its variable rate debt as a means of hedging its exposure to changes in LIBOR interest rates as part of its overall interest rate risk management strategy. These interest rate caps are not held for trading or speculative purposes and are designated as qualifying cash flow hedges. See Note 13 for further details.

Noncontrolling interests represent third-party equity ownership interests in entities which are consolidated by the Company for financial statement reporting purposes. As of December 31, 2022, third parties held noncontrolling equity interests in 689 consolidated legal entities.

Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are determined based on the principal or most advantageous market for the item being measured, assume that buyers and sellers are independent, willing and able to transact, and knowledgeable, with access to all information customarily available in such a transaction, and are based on assumptions that market participants would use in pricing the item, not assumptions specific to the reporting entity. The criticality of a particular fair value estimate to the Company's consolidated financial statements depends upon the nature and size of the item being measured, the extent of uncertainties involved and the nature and magnitude or potential effect of

The Company relies on fair value measurements and estimates for purposes that require the recording, reassessment, or adjustment of the carrying amounts of certain assets, liabilities, and noncontrolling interests subject to put provisions (redeemable equity interests classified as temporary equity). These purposes can include the accounting for business combination transactions; impairment assessments for goodwill, other intangible assets, or other long-lived assets; recurrent revaluation of investments in debt and equity securities, contingent earn-out obligations, interest rate cap agreements, and noncontrolling interests subject to put provisions; and the accounting for equity method and other investments and stock-based compensation, as applicable. The Company has classified its assets, liabilities and temporary equity into the fair value hierarchy levels defined by the Financial Accounting Standards Board (FASB) reflecting their differing degrees of uncertainty. See Note 24 for further details.

In March 2020, the FASB issued Accounting Standards Update (ASU) No. 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting (ASU 2020-04). ASU 2020-04 provides optional expedients and exceptions for applying U.S. GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another rate that is expected to be discontinued. The amendments in this ASU were effective beginning on March 12, 2020, and the Company could elect to apply the amendments prospectively through December 31, 2022. In December 2022, the FASB issued ASU No. 2022-06, Reference Rate Reform (Topic 848): Deferral of the Sunset Date of Topic 848, which extends the election date to December 31, 2024. Effective January 1, 2022 certain LIBOR tenors that do not affect the Company, including the one-week and two-month U.S. dollar LIBOR rate, ceased or became non-representative. The remaining U.S. dollar LIBOR tenors will cease or become non-representative effective July 1, 2023. This change will have no impact on the Company's ability to borrow. The Company is currently assessing the other effects this guidance may have on its consolidated financial statements.

In October 2021, the FASB issued ASU No. 2021-08, Business Combinations (Topic 805): Accounting for Acquired Contract Assets and Contract Liabilities (ASU 2021-08). ASU 2021-08 requires application of ASC 606, Revenue from Contracts with Customers, to recognize and measure assets and liabilities from contracts with customers acquired in a business combination. This ASU creates an exception to the general recognition and measurement principle in ASC 805 and will result in recognition of contract assets and contract liabilities consistent with those recorded by the acquiree immediately before the acquisition date. ASU 2021-08 is effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years. Early adoption is permitted for all entities. The Company does not expect the adoption of this standard to have a material impact on its consolidated financial statements.