Goodwill and Other Intangible Assets - Goodwill and Accumulated Goodwill Impairment Losses (Details) $ in Millions	3 Months Ended
	Mar. 31, 2023 USD ($)
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	$ 4,209.7
Accumulated goodwill impairment losses, beginning balance	(1,520.2)
Goodwill, net, beginning balance	2,689.5
Goodwill acquired during the period	231.9
Effect of foreign currency exchange rates	4.6
Goodwill, gross, ending balance	4,446.2
Accumulated goodwill impairment losses, ending balance	(1,520.2)
Goodwill, net, ending balance	2,926.0
Operating Segments | Northeast
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	923.5
Accumulated goodwill impairment losses, beginning balance	(798.8)
Goodwill, net, beginning balance	124.7
Goodwill acquired during the period	0.0
Effect of foreign currency exchange rates	0.0
Goodwill, gross, ending balance	923.5
Accumulated goodwill impairment losses, ending balance	(798.8)
Goodwill, net, ending balance	124.7
Operating Segments | South
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	236.6
Accumulated goodwill impairment losses, beginning balance	(61.0)
Goodwill, net, beginning balance	175.6
Goodwill acquired during the period	0.0
Effect of foreign currency exchange rates	0.0
Goodwill, gross, ending balance	236.6
Accumulated goodwill impairment losses, ending balance	(61.0)
Goodwill, net, ending balance	175.6
Operating Segments | West
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	216.8
Accumulated goodwill impairment losses, beginning balance	(16.6)
Goodwill, net, beginning balance	200.2
Goodwill acquired during the period	0.0
Effect of foreign currency exchange rates	0.0
Goodwill, gross, ending balance	216.8
Accumulated goodwill impairment losses, ending balance	(16.6)
Goodwill, net, ending balance	200.2
Operating Segments | Midwest
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	1,116.7
Accumulated goodwill impairment losses, beginning balance	(556.1)
Goodwill, net, beginning balance	560.6
Goodwill acquired during the period	0.0
Effect of foreign currency exchange rates	0.0
Goodwill, gross, ending balance	1,116.7
Accumulated goodwill impairment losses, ending balance	(556.1)
Goodwill, net, ending balance	560.6
Operating Segments | Interactive
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	1,628.4
Accumulated goodwill impairment losses, beginning balance	0.0
Goodwill, net, beginning balance	1,628.4
Goodwill acquired during the period	231.9
Effect of foreign currency exchange rates	4.6
Goodwill, gross, ending balance	1,864.9
Accumulated goodwill impairment losses, ending balance	0.0
Goodwill, net, ending balance	1,864.9
Other
Goodwill [Roll Forward]
Goodwill, gross, beginning balance	87.7
Accumulated goodwill impairment losses, beginning balance	(87.7)
Goodwill, net, beginning balance	0.0
Goodwill acquired during the period	0.0
Effect of foreign currency exchange rates	0.0
Goodwill, gross, ending balance	87.7
Accumulated goodwill impairment losses, ending balance	(87.7)
Goodwill, net, ending balance	$ 0.0