Goodwill and Other Intangible Assets - Goodwill and Accumulated Goodwill Impairment Losses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	$ 4,245.3	$ 4,209.7
Accumulated goodwill impairment losses	(1,550.2)	(1,520.2)
Goodwill, net, beginning balance	2,695.1	2,689.5
Goodwill acquired during year		231.9
Goodwill disposed of during the year		(231.9)
Effect of foreign currency exchange rates	(119.7)	35.6
Impairment losses during year	(12.3)	(30.0)	$ (37.4)
Goodwill, gross, ending balance	4,125.6	4,245.3	4,209.7
Accumulated goodwill impairment losses, ending balance	(1,562.5)	(1,550.2)	(1,520.2)
Goodwill, net, ending balance	2,563.1	2,695.1	2,689.5
Northeast
Goodwill [Roll Forward]
Impairment losses during year	0.0	(30.0)	(37.4)
South
Goodwill [Roll Forward]
Impairment losses during year	(6.1)	0.0	0.0
Midwest
Goodwill [Roll Forward]
Impairment losses during year	(6.2)	0.0	0.0
Operating segments | Northeast
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	923.5	923.5
Accumulated goodwill impairment losses	(828.8)	(798.8)
Goodwill, net, beginning balance	94.7	124.7
Goodwill acquired during year		0.0
Goodwill disposed of during the year		0.0
Effect of foreign currency exchange rates	0.0	0.0
Impairment losses during year	0.0	(30.0)
Goodwill, gross, ending balance	923.5	923.5	923.5
Accumulated goodwill impairment losses, ending balance	(828.8)	(828.8)	(798.8)
Goodwill, net, ending balance	94.7	94.7	124.7
Operating segments | South
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	236.6	236.6
Accumulated goodwill impairment losses	(61.0)	(61.0)
Goodwill, net, beginning balance	175.6	175.6
Goodwill acquired during year		0.0
Goodwill disposed of during the year		0.0
Effect of foreign currency exchange rates	0.0	0.0
Impairment losses during year	(6.1)	0.0
Goodwill, gross, ending balance	236.6	236.6	236.6
Accumulated goodwill impairment losses, ending balance	(67.1)	(61.0)	(61.0)
Goodwill, net, ending balance	169.5	175.6	175.6
Operating segments | West
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	216.8	216.8
Accumulated goodwill impairment losses	(16.6)	(16.6)
Goodwill, net, beginning balance	200.2	200.2
Goodwill acquired during year		0.0
Goodwill disposed of during the year		0.0
Effect of foreign currency exchange rates	0.0	0.0
Impairment losses during year	0.0	0.0
Goodwill, gross, ending balance	216.8	216.8	216.8
Accumulated goodwill impairment losses, ending balance	(16.6)	(16.6)	(16.6)
Goodwill, net, ending balance	200.2	200.2	200.2
Operating segments | Midwest
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	1,116.7	1,116.7
Accumulated goodwill impairment losses	(556.1)	(556.1)
Goodwill, net, beginning balance	560.6	560.6
Goodwill acquired during year		0.0
Goodwill disposed of during the year		0.0
Effect of foreign currency exchange rates	0.0	0.0
Impairment losses during year	(6.2)	0.0
Goodwill, gross, ending balance	1,116.7	1,116.7	1,116.7
Accumulated goodwill impairment losses, ending balance	(562.3)	(556.1)	(556.1)
Goodwill, net, ending balance	554.4	560.6	560.6
Operating segments | Interactive
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	1,664.0	1,628.4
Accumulated goodwill impairment losses	0.0	0.0
Goodwill, net, beginning balance	1,664.0	1,628.4
Goodwill acquired during year		231.9
Goodwill disposed of during the year		(231.9)
Effect of foreign currency exchange rates	(119.7)	35.6
Impairment losses during year	0.0	0.0
Goodwill, gross, ending balance	1,544.3	1,664.0	1,628.4
Accumulated goodwill impairment losses, ending balance	0.0	0.0	0.0
Goodwill, net, ending balance	1,544.3	1,664.0	1,628.4
Other
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	87.7	87.7
Accumulated goodwill impairment losses	(87.7)	(87.7)
Goodwill, net, beginning balance	0.0	0.0
Goodwill acquired during year		0.0
Goodwill disposed of during the year		0.0
Effect of foreign currency exchange rates	0.0	0.0
Impairment losses during year	0.0	0.0
Goodwill, gross, ending balance	87.7	87.7	87.7
Accumulated goodwill impairment losses, ending balance	(87.7)	(87.7)	(87.7)
Goodwill, net, ending balance	$ 0.0	$ 0.0	$ 0.0