Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($) shares in Thousands, $ in Millions	Total	Class A Common Stock	Class B Common Stock	Common Stock Class A Common Stock	Common Stock Class B Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Loss	Non- Controlling Interests
Balance (in shares) at Dec. 31, 2019				172,867	1,490
Balance at Dec. 31, 2019	$ 782.1			$ 0.2	$ 0.0	$ 1,003.5	$ (153.5)	$ (78.2)	$ 10.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	43.2						42.9		0.3
Equity-based compensation, including amounts capitalized	46.0					46.0
Stock option exercises (in shares)				724
Stock option exercises	15.3					16.0			(0.7)
Repurchases of Class A common stock (in shares)				(7,341)
Repurchases of Class A common stock	(398.0)						(398.0)
Impact of derivatives, net	26.0							26.0
Change in foreign currency translation adjustment	(24.9)							(24.9)
Vesting of restricted stock units and other (in shares)				1,377	(204)
Vesting of restricted stock units and other	(0.6)					1.4	(0.6)	(0.1)	(1.3)
Balance (in shares) at Mar. 31, 2020				167,627	1,286
Balance at Mar. 31, 2020	489.1			$ 0.2	$ 0.0	1,066.9	(509.2)	(77.2)	8.4
Balance (in shares) at Dec. 31, 2019				172,867	1,490
Balance at Dec. 31, 2019	782.1			$ 0.2	$ 0.0	1,003.5	(153.5)	(78.2)	10.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(630.0)
Balance (in shares) at Jun. 30, 2020				166,751	1,120
Balance at Jun. 30, 2020	(254.5)			$ 0.2	$ 0.0	1,164.5	(1,326.1)	(99.9)	6.8
Balance (in shares) at Mar. 31, 2020				167,627	1,286
Balance at Mar. 31, 2020	489.1			$ 0.2	$ 0.0	1,066.9	(509.2)	(77.2)	8.4
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(673.2)						(673.2)
Equity-based compensation, including amounts capitalized	49.4					49.4
Stock option exercises (in shares)				907
Stock option exercises	29.2					29.7			(0.5)
Repurchases of Class A common stock (in shares)				(2,645)
Repurchases of Class A common stock	(143.7)						(143.7)
Issuance of Class A common stock under ESPP (in shares)				302
Issuance of Class A common stock under ESPP	17.5					17.5
Impact of derivatives, net	(12.1)							(12.1)
Change in foreign currency translation adjustment	(10.7)							(10.7)
Vesting of restricted stock units and other (in shares)				560	(166)
Vesting of restricted stock units and other	0.0					1.0		0.1	(1.1)
Balance (in shares) at Jun. 30, 2020				166,751	1,120
Balance at Jun. 30, 2020	(254.5)			$ 0.2	$ 0.0	1,164.5	(1,326.1)	(99.9)	6.8
Balance (in shares) at Dec. 31, 2020		169,157	688	169,157	688
Balance at Dec. 31, 2020	(11.8)			$ 0.2	$ 0.0	1,308.8	(1,190.9)	(131.0)	1.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	10.8						10.8
Equity-based compensation, including amounts capitalized	53.2					53.2
Stock option exercises (in shares)				309
Stock option exercises	11.6					11.8			(0.2)
Repurchases of Class A common stock (in shares)				(2,544)
Repurchases of Class A common stock	(195.1)						(195.1)
Impact of derivatives, net	26.5							26.5
Change in foreign currency translation adjustment	33.7							33.7
Vesting of restricted stock units and other (in shares)				1,523	(209)
Vesting of restricted stock units and other	0.1					(0.4)		(0.4)	0.9
Balance (in shares) at Mar. 31, 2021				168,445	479
Balance at Mar. 31, 2021	(71.0)			$ 0.2	$ 0.0	1,373.4	(1,375.2)	(71.2)	1.8
Balance (in shares) at Dec. 31, 2020		169,157	688	169,157	688
Balance at Dec. 31, 2020	(11.8)			$ 0.2	$ 0.0	1,308.8	(1,190.9)	(131.0)	1.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	57.7
Repurchases of Class A common stock (in shares)		(3,500)
Repurchases of Class A common stock		$ (275.9)
Balance (in shares) at Jun. 30, 2021		168,720	379	168,720	379
Balance at Jun. 30, 2021	(31.4)			$ 0.2	$ 0.0	1,458.0	(1,409.2)	(82.3)	1.9
Balance (in shares) at Mar. 31, 2021				168,445	479
Balance at Mar. 31, 2021	(71.0)			$ 0.2	$ 0.0	1,373.4	(1,375.2)	(71.2)	1.8
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	46.9						46.8		0.1
Equity-based compensation, including amounts capitalized	52.1					52.1
Stock option exercises (in shares)				337
Stock option exercises	14.2					14.2
Repurchases of Class A common stock (in shares)				(956)
Repurchases of Class A common stock	(80.8)						(80.8)
Issuance of Class A common stock under ESPP (in shares)				291
Issuance of Class A common stock under ESPP	18.4					18.4
Impact of derivatives, net	(5.2)							(5.2)
Change in foreign currency translation adjustment	(5.9)							(5.9)
Vesting of restricted stock units and other (in shares)				603	(100)
Vesting of restricted stock units and other	(0.1)					(0.1)
Balance (in shares) at Jun. 30, 2021		168,720	379	168,720	379
Balance at Jun. 30, 2021	$ (31.4)			$ 0.2	$ 0.0	$ 1,458.0	$ (1,409.2)	$ (82.3)	$ 1.9