Derivative Instruments and Hedging Activities - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Nov. 30, 2019	Dec. 31, 2019	Dec. 31, 2019
Derivative [Line Items]
Amortization of net (loss) gain on treasury lock			$ (18.2)
3.90% Senior Notes, due June 2022
Derivative [Line Items]
Stated interest rate		3.90%	3.90%
Treasury Lock
Derivative [Line Items]
Amortization of net (loss) gain on treasury lock	$ (13.1)	$ (13.1)
Amortization of treasury lock settlements, after tax		6.5
Income tax benefit from stranded tax effects in accumulated OCI related to write-off of remaining treasury lock		$ 3.2