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Fair Value of Financial Instruments | 12 Months Ended
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Mar. 31, 2023
Fair Value Disclosures [Abstract] |
Fair Value of Financial Instruments | Fair Value of Financial Instruments Fair value is an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the Company utilizes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows: Level 1-Observable inputs such as quoted prices in active markets; Level 2-Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and Level 3-Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions. The carrying amount of cash equivalents approximates fair value because their maturity is less than three months. Management believes the carrying amount of the equity investments materially approximated fair value at March 31, 2023 based upon unobservable inputs. The fair values of these investments have been determined as Level 3 fair value measurements. The carrying amount of accounts receivable, accounts payable and accrued liabilities approximates fair value due to the short-term maturity of the amounts and are considered Level 2 in the fair value hierarchy. The fair value of the Company's Revolving Credit Facility is estimated using discounted cash flow analysis, based on the Company's current incremental borrowing rates for similar types of borrowing arrangements. Based on the borrowing rates currently available to the Company for bank loans with similar terms and average maturities, the fair value of the Company's Revolving Credit Facility at March 31, 2023 approximated the carrying value excluding debt discounts and debt issuance costs and are considered Level 2 in the fair value hierarchy. The Company measures the fair value of its Convertible Debt and Senior Notes for disclosure purposes. These fair values are based on observable market prices for this debt, which is traded in less active markets and are therefore classified as a Level 2 fair value measurement. The following table shows the carrying amounts and fair values of the Company's debt obligations (in millions):
| March 31,
| 2023 |  | 2022
| Carrying Amount(1) |  | Fair Value |  | Carrying Amount(1) |  | Fair Value
Revolving Credit Facility | $ | 91.4 |  |  | $ | 100.0 |  |  | $ | 1,388.5 |  |  | $ | 1,399.1 |
4.333% 2023 Notes | 999.4 |  |  | 997.1 |  |  | 995.8 |  |  | 1,017.1 |
2.670% 2023 Notes | 999.4 |  |  | 985.4 |  |  | 997.9 |  |  | 997.7 |
0.972% 2024 Notes | 1,398.2 |  |  | 1,337.6 |  |  | 1,396.2 |  |  | 1,343.9 |
0.983% 2024 Notes | 997.9 |  |  | 941.9 |  |  | 996.4 |  |  | 946.3 |
4.250% 2025 Notes | 1,191.8 |  |  | 1,176.0 |  |  | 1,188.5 |  |  | 1,213.6 |
2015 Senior Convertible Debt | 12.4 |  |  | 41.8 |  |  | 30.6 |  |  | 115.4 |
2017 Senior Convertible Debt | 81.8 |  |  | 189.6 |  |  | 104.1 |  |  | 285.6 |
2020 Senior Convertible Debt | 661.1 |  |  | 732.1 |  |  | 584.0 |  |  | 765.5 |
2017 Junior Convertible Debt | 6.5 |  |  | 14.5 |  |  | 5.4 |  |  | 21.7 |
Total | $ | 6,439.9 |  |  | $ | 6,516.0 |  |  | $ | 7,687.4 |  |  | $ | 8,105.9 |
(1) The carrying amounts presented are net of debt discounts and debt issuance costs (see Note 5 for further information).

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- Definition The entire disclosure for a company's election to apply the fair value option for measurement and reporting of eligible financial assets and liabilities (as defined), as well as certain other eligible items (as defined) included in the statement of financial position, whether such option is elected for a single eligible item or a group of similar eligible items and is in addition to other disclosures concerning fair value which the company may be required to provide. Such disclosure might be expected to include: (1) for items included in the statement of financial position: (a) the reasons for electing a fair value option for each eligible item or group of similar eligible items; (b) if the fair value option is elected for some but not all eligible items within a group of similar eligible items: (i) a description of those similar items and the reasons for partial election and (ii) information of how the group of similar items relates to individual balance sheet line items; (c) for each line item in the statement of financial position that includes an item or items for which the fair value option has been elected: (i) information of how each line item in the statement of financial position relates to major categories of assets and liabilities presented in accordance with other fair value disclosures and (ii) the aggregate carrying amount of ineligible items included in each line item in the balance sheet, if any; (d) the difference between the aggregate fair value and the aggregate unpaid principal balance (assuming contractual principal amounts and fair value option elected) of: (i) loans and long-term receivables (other than securities otherwise reported at fair value) and (ii) long-term debt instruments; (e) for loans held as assets for which the fair value option has been elected: (i) the aggregate fair value of loans that are 90 days or more past due, (ii) if the policy is to recognize interest income separately from other changes in fair value, the aggregate fair value of loans in nonaccrual status, and (iii) the difference between the aggregate fair value and the aggregate unpaid principal balance for loans that are 90 days or more past due, in nonaccrual status, or both; (f) for investments that would have been accounted for under the equity method if the entity had not chosen to apply the fair value option, the information required for such investments, if material either individually or in the aggregate; (2) for items included in the income statement: (a) the amounts of gains and losses from fair value changes included in earnings and in which line in the income statement those gains and losses are reported whether or not combined with gains and losses from items required to be accounted for at fair value; (b) a description of how interest and dividends are measured and where they are reported in the income statement; (c) for loans and other receivables held as assets: (i) the estimated amount of gains or losses included in earnings attributable to changes in instrument-specific credit risk and (ii) how the gains or losses attributable to changes in instrument-specific credit risk were determined; (d) for liabilities with fair values that have been significantly affected during the reporting period by changes in the instrument-specific credit risk: (i) the estimated amount of gains and losses from fair value changes included in earnings that are attributable to changes in the instrument-specific credit risk, (ii) qualitative information about the reasons for those changes, and (iii) how the gains and losses attributable to changes in instrument-specific credit risk were determined; and (3) certain other disclosures as required or determined to be provided. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI https://asc.fasb.org/extlink&oid=123596393&loc=d3e14217-108612 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -URI https://asc.fasb.org/topic&trid=2134543 + Details
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