Convertible Debt (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	1 Months Ended			3 Months Ended
	Nov. 30, 2021	Apr. 30, 2021	Dec. 31, 2019	Mar. 31, 2022	Jun. 30, 2021	Dec. 31, 2021	Mar. 31, 2021
Convertible Debt [Abstract]
Cost of call spread		$ 46.9	$ 52.6
Purchase of note hedges		136.7	108.7
Proceeds from issuance of warrants		89.8	$ 56.1
0% Notes [Member]
Convertible Debt [Abstract]
Face amount of offering		632.5
Outstanding principal balance				$ 632.5
Unamortized debt issuance costs				$ 12.6
Maturity date				Apr. 30, 2026
Interest rate				0.00%		0.00%
Effective interest rate				0.50%
Conversion price per share (in dollars per share)				$ 57.84
Effective conversion price per share with call spread (in dollars per share)				$ 76.39
Total shares of common stock subject to conversion (in shares)				10.9
0.125% Notes [Member]
Convertible Debt [Abstract]
Outstanding principal balance				$ 548.8
Unamortized debt issuance costs				$ 6.0
Maturity date				Dec. 31, 2024
Interest rate				0.125%		0.125%	0.125%
Effective interest rate				0.50%
Conversion price per share (in dollars per share)				$ 83.28
Effective conversion price per share with call spread (in dollars per share)				$ 123.38
Total shares of common stock subject to conversion (in shares)				6.6
Percentage of principal amount used as purchase price upon occurrence of fundamental change				100.00%
1% Notes [Member]
Convertible Debt [Abstract]
Principal amount repurchased		247.9
Repurchase of convertible notes	$ 62.0	$ 257.0
Interest rate				1.00%			1.00%
Loss on early retirement of debt					$ 8.6
Percentage of principal amount used as purchase price upon occurrence of fundamental change				100.00%