Organization and Summary of Significant Accounting Policies - Accounting for Leases (Details) - USD ($) $ in Millions	Dec. 31, 2019	Jan. 02, 2019	Jan. 01, 2019	Dec. 31, 2018
Assets
Operating lease right-of-use assets	$ 2,360.5	$ 2,425.6
Liabilities and Equity
Accrued expenses and other current liabilities	701.9	636.8		$ 566.6
Long-term operating lease liabilities	2,301.2	2,387.5
Deferred tax liabilities	677.9	578.7		577.8
Other long-term liabilities	444.0	481.0		519.0
Retained earnings	$ 2,675.8	$ 2,370.8		$ 2,365.8
ASC 842
Liabilities and Equity
Retained earnings			$ 5.0
ASC 842 | Impact of Adoption
Assets
Operating lease right-of-use assets			2,425.6
Liabilities and Equity
Accrued expenses and other current liabilities			70.2
Long-term operating lease liabilities			2,387.5
Deferred tax liabilities			0.9
Other long-term liabilities			(38.0)
Retained earnings			$ 5.0