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FAIR VALUE MEASUREMENTS. | 9 Months Ended
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Sep. 30, 2019
Fair Value Disclosures [Abstract] |
FAIR VALUE MEASUREMENTS | FAIR VALUE MEASUREMENTS. We determine the fair value of our cash equivalents and certain investments using the following broad levels of inputs as defined by related accounting standards: Level 1 – quoted prices in active markets for identical securities. Level 2 – observable inputs other than Level 1 quoted prices including, but not limited to, quoted prices for similar
| securities, interest rates, prepayment speeds, and credit risk. These inputs are based on market data
obtained from independent sources. Level 3 – unobservable inputs reflecting our own assumptions based on the best information available. We do not value any investments using Level 3 inputs. These levels are not necessarily an indication of the risk or liquidity associated with our investments. The following table summarizes our investments that are recognized in our unaudited condensed consolidated balance sheets using fair value measurements determined based on the differing levels of inputs. This table excludes investments held by the consolidated T. Rowe Price investment products which are presented separately on our unaudited condensed consolidated balance sheets and are detailed in Note 5.
| 9/30/2019 |  | 12/31/2018
(in millions) | Level 1 |  | Level 2 |  | Level 1 |  | Level 2
Cash equivalents held in T. Rowe Price money market funds | $ | 1,921.2 |  |  | $ | — |  |  | $ | 1,196.0 |  |  | $ | — |
T. Rowe Price investment products | 1,560.1 |  |  | 7.9 |  |  | 1,519.2 |  |  | 19.2 |
T. Rowe Price investment products designated as economic hedge of supplemental savings plan liability | 443.0 |  |  | — |  |  | 381.3 |  |  | — |
Total | $ | 3,924.3 |  |  | $ | 7.9 |  |  | $ | 3,096.5 |  |  | $ | 19.2 |
As required by the accounting guidance, the fair value hierarchy levels table above does not include the investment partnerships and other investments that are held at fair value using their NAV per share as a practical expedient. The carrying value of these investments as disclosed in Note 3 were $103.2 million at September 30, 2019 and $99.6 million at December 31, 2018.

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- Definition The entire disclosure for the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments as well as disclosures related to the fair value of non-financial assets and liabilities. Such disclosures about the financial instruments, assets, and liabilities would include: (1) the fair value of the required items together with their carrying amounts (as appropriate); (2) for items for which it is not practicable to estimate fair value, disclosure would include: (a) information pertinent to estimating fair value (including, carrying amount, effective interest rate, and maturity, and (b) the reasons why it is not practicable to estimate fair value; (3) significant concentrations of credit risk including: (a) information about the activity, region, or economic characteristics identifying a concentration, (b) the maximum amount of loss the entity is exposed to based on the gross fair value of the related item, (c) policy for requiring collateral or other security and information as to accessing such collateral or security, and (d) the nature and brief description of such collateral or security; (4) quantitative information about market risks and how such risks are managed; (5) for items measured on both a recurring and nonrecurring basis information regarding the inputs used to develop the fair value measurement; and (6) for items presented in the financial statement for which fair value measurement is elected: (a) information necessary to understand the reasons for the election, (b) discussion of the effect of fair value changes on earnings, (c) a description of [similar groups] items for which the election is made and the relation thereof to the balance sheet, the aggregate carrying value of items included in the balance sheet that are not eligible for the election; (7) all other required (as defined) and desired information. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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