Property and Equipment - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Property, software and equipment depreciation, amortization expense	$ 402.1	$ 401.2	$ 341.4
Capitalization of stock-based compensation	35.9	34.8	$ 28.9
Disposal of property plant and equipment	166.7	208.0
Write off of internal-use software	$ 3.8	$ 4.9