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Organization and Summary of Significant Accounting Policies - Accounting for Leases (Details) - USD ($) $ in Millions | Jan. 01, 2019 | Dec. 31, 2018
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Recent Accounting Pronouncements |  |
Total undiscounted rent obligations |  | $ 5,432.8
Accounting Standards Update 2016-02 | Scenario Forecast Adjustment |  |
Recent Accounting Pronouncements |  |
Right-of-use assets | $ 2,400.0 |
Lease liabilities | $ 2,400.0 |

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