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Description of the Business and Summary of Significant Accounting Policies - Additional Information (Details) shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2017 USD ($) shares | Mar. 31, 2017 USD ($) | Jun. 30, 2016 shares | Jun. 30, 2017 USD ($) Segment shares | Jun. 30, 2016 USD ($) shares | Dec. 31, 2016 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |  |  |  |  |
Number of business segments | Segment |  |  |  | 3 |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Unrecognized tax benefit |  |  |  |  |  | $ 10.1
Offset of valuation allowance |  |  |  |  |  | $ 10.1
Decrease in net cash used in investing activities |  |  |  | $ 159.9 | $ 104.0 |
Accounting Standards Update 2016-18 |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Adjustment to cash, cash equivalents and restricted cash beginning balance |  | $ 38.1 |  | 38.1 |  |
Adjustment to cash, cash equivalents and restricted cash ending balance | $ 41.9 |  |  | $ 41.9 |  |
Decrease in net cash used in investing activities |  | $ 3.8 |  |  |  |
Stock Options |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Anti-dilutive securities (in shares) | shares | 2.8 |  | 3.0 | 2.8 | 3.0 |
Restricted Stock Units |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Anti-dilutive securities (in shares) | shares | 4.4 |  | 5.3 | 4.4 | 5.3 |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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