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Fair Value Measurements | 12 Months Ended
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Dec. 31, 2016
Fair Value Disclosures [Abstract] |
Fair Value Measurements | Fair Value Measurements: Our financial assets and liabilities that are measured at fair value on a recurring basis are as follows (in millions):
|  |  |  | Fair Value Measurements at Reporting Date Using
As of December 31, 2016 |  | Fair Value |  | Quoted Prices in Active Markets for Identical Assets (Level 1) |  | Significant Other Observable Inputs (Level 2) |  | Significant Unobservable Inputs (Level 3) |  | Valuation Technique (1)
Prepaid expenses and other current assets: |  |  |  |  |  |  |  |  |  |
Current portion of restricted marketable securities |  | $ | 24.2 |  |  | $ | — |  |  | $ | 24.2 |  |  | $ | — |  |  | M
Other long-term assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted marketable securities |  | 33.5 |  |  | — |  |  | 33.5 |  |  | — |  |  | M
Redeemable noncontrolling interests |  | 138.3 |  |  | — |  |  | — |  |  | 138.3 |  |  | I
As of December 31, 2015 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Prepaid expenses and other current assets: |  |  |  |  |  |  |  |  |  |
Current portion of restricted marketable securities |  | $ | 16.1 |  |  | $ | — |  |  | $ | 16.1 |  |  | $ | — |  |  | M
Other long-term assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restricted marketable securities |  | 40.1 |  |  | — |  |  | 40.1 |  |  | — |  |  | M
Redeemable noncontrolling interests |  | 121.1 |  |  | — |  |  | — |  |  | 121.1 |  |  | I
(1) | The three valuation techniques are: market approach (M), cost approach (C), and income approach (I).
In addition to assets and liabilities recorded at fair value on a recurring basis, we are also required to record assets and liabilities at fair value on a nonrecurring basis. Generally, assets are recorded at fair value on a nonrecurring basis as a result of impairment charges or similar adjustments made to the carrying value of the applicable assets. During the years ended December 31, 2016 and 2015, we did not record any gains or losses related to our nonfinancial assets and liabilities that are recognized or disclosed at fair value in the financial statements on a nonrecurring basis as part of our continuing operations. As a result of our consolidation of Fairlawn in 2014 and the remeasurement of our previously held equity interest at fair value, we recorded a $27.2 million gain as part of Other income during the year ended December 31, 2014. We determined the fair value of our previously held equity interest using the income approach. The income approach included the use of Fairlawn’s projected operating results and cash flows discounted using a rate that reflects market participant assumptions. The projected operating results used management’s best estimates of economic and market conditions over the forecasted period including assumptions for pricing and volume, operating expenses, and capital expenditures. See Note 2, Business Combinations. As discussed in Note 1, Summary of Significant Accounting Policies, “Fair Value Measurements,” the carrying value equals fair value for our financial instruments that are not included in the table below and are classified as current in our consolidated balance sheets. The carrying amounts and estimated fair values for our other financial instruments are presented in the following table (in millions):
| As of December 31, 2016 |  | As of December 31, 2015
| Carrying Amount |  | Estimated Fair Value |  | Carrying Amount |  | Estimated Fair Value
Long-term debt: |  |  |  |  |  |  |  |  |  |  |
Advances under revolving credit facility | $ | 152.0 |  |  | $ | 152.0 |  |  | $ | 130.0 |  |  | $ | 130.0 |
Term loan facilities | 421.2 |  |  | 422.5 |  |  | 443.3 |  |  | 445.0 |
7.75% Senior Notes due 2022 | — |  |  | — |  |  | 174.3 |  |  | 183.7 |
5.125% Senior Notes due 2023 | 295.3 |  |  | 297.8 |  |  | 294.6 |  |  | 288.0 |
5.75% Senior Notes due 2024 | 1,193.2 |  |  | 1,216.6 |  |  | 1,192.6 |  |  | 1,146.0 |
5.75% Senior Notes due 2025 | 343.9 |  |  | 349.6 |  |  | 343.4 |  |  | 332.5 |
2.00% Convertible Senior Subordinated Notes due 2043 | 275.7 |  |  | 382.6 |  |  | 265.9 |  |  | 345.0 |
Other notes payable | 55.8 |  |  | 55.8 |  |  | 39.2 |  |  | 39.2 |
Financial commitments: |  |  |  |  |  |  |  |  |  |  |
Letters of credit | — |  |  | 33.3 |  |  | — |  |  | 34.2 |
Fair values for our long-term debt and financial commitments are determined using inputs, including quoted prices in nonactive markets, that are observable either directly or indirectly, or Level 2 inputs within the fair value hierarchy. See Note 1, Summary of Significant Accounting Policies, “Fair Value Measurements” and “Redeemable Noncontrolling Interests.”

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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/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14172-108612 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=6957238&loc=d3e14064-108612 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13537-108611 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13504-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 + Details
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