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Organization and Summary of Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability	$ 340.1	$ 320.4
Operating lease assets	310.1	297.7
Adjustment to retained deficit	882.1	983.4		$ 1,098.9	$ 1,336.6
Impact of adoption of ASC 842
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating lease, liability			$ 294.0
Operating lease assets			$ 294.0
Adjustment to retained deficit				6.1
Retained Deficit
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to retained deficit	$ (431.8)	$ (315.7)		(247.0)	$ (41.3)
Retained Deficit | Impact of adoption of ASC 842
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Adjustment to retained deficit				$ 6.1

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