Immaterial Correction of Prior Period Financial Statements - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				9 Months Ended
	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenue	$ 651.1			$ 548.1	$ 1,846.4	$ 1,544.9
Gross Profit	511.9			424.0	1,443.4	1,179.5
OPERATING INCOME	126.9			100.6	362.4	228.9
Net income	$ 123.4			$ 80.2	$ 341.8	$ 213.5
Diluted net income per share (in dollars per share)	$ 0.75			$ 0.46	$ 2.03	$ 1.22
Corrections [Member]
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Total revenue		$ 2.1	$ 0.8	$ 0.6		$ 3.1
Gross Profit		2.1	0.8	0.6		3.1
OPERATING INCOME		2.1	0.8	0.6		3.1
Net income		$ 1.7	$ 0.6	$ 0.4		$ 2.2
Diluted net income per share (in dollars per share)		$ 0.01	$ 0	$ 0		$ 0.01