CONSOLIDATED STATEMENTS OF EQUITY AND REDEEMABLE NON-CONTROLLING INTEREST - USD ($) $ in Millions		Total	Common stock		Common stock Class B common stock		Additional paid-in capital	Accumulated other comprehensive loss	Retained earnings	Noncontrolling Interest
Beginning Balance at Dec. 31, 2020		$ 2,661.5	$ 788.2	[1]	$ 0.0	[1]	$ 41.4	$ (6.3)	$ 1,838.2	$ 0.0
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation for stock and stock option issuances and excess tax benefits from option exercises			13.4				(5.4)
Issuance of stock in connection with employee stock plans			4.2
Class B common stock converted to class A common stock1	[1]				0.0
Repurchase of common stock			(15.9)
Foreign currency translation adjustment		0.0						0.0
Gain on cash flow hedges, net of tax expense of $1.4, and $0.6, respectively		1.8						1.8
Net income		156.2							156.2	0.0
Dividends paid									(8.2)
Ending Balance at Mar. 31, 2021		2,807.6	789.9	[1]	0.0	[1]	36.0	(4.5)	1,986.2	0.0
Redeemable non-controlling interest, beginning balances at Dec. 31, 2020		0.0
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income attributable to redeemable non-controlling interest		0.0
Redeemable non-controlling interest, ending balances at Mar. 31, 2021		0.0
Beginning Balance at Dec. 31, 2021		4,629.2	1,711.6	[1]	0.0	[1]	58.3	(3.0)	2,859.5	2.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Compensation for stock and stock option issuances and excess tax benefits from option exercises			17.0				(6.5)
Issuance of stock in connection with employee stock plans			7.8
Class B common stock converted to class A common stock1	[1]				0.0
Repurchase of common stock			(80.1)
Foreign currency translation adjustment		4.0						4.0
Gain on cash flow hedges, net of tax expense of $1.4, and $0.6, respectively		3.9						3.9
Net income		343.6							342.2	0.5
Dividends paid									(10.3)
Ending Balance at Mar. 31, 2022		4,907.7	$ 1,656.3	[1]	$ 0.0	[1]	$ 51.8	$ 4.9	$ 3,191.4	$ 3.3
Redeemable non-controlling interest, beginning balances at Dec. 31, 2021		34.0
Increase (Decrease) in Temporary Equity [Roll Forward]
Net income attributable to redeemable non-controlling interest		0.9
Redeemable non-controlling interest, ending balances at Mar. 31, 2022		$ 34.9

[1] Prior to June 7, 2021, common stock was classified as Class A common stock. The Class A common stock reclassification as common stock occurred in connection with the elimination of our classified common stock structure following the conversion of all Class B common stock to Class A common stock.