Goodwill and Other Intangible Assets - Goodwill and Accumulated Goodwill Impairment Losses (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2022
Goodwill [Roll Forward]
Goodwill, gross, beginning balance		$ 4,305.3
Accumulated goodwill impairment losses, beginning balance		(1,482.8)
Goodwill, net, beginning balance		2,822.5
Effect of foreign currency exchange rates		(124.8)
Impairment losses during year		(37.4)
Other		1.5
Goodwill, gross, ending balance	$ 4,182.0	4,182.0
Accumulated goodwill impairment losses, ending balance	(1,520.2)	(1,520.2)
Goodwill, net, ending balance	2,661.8	2,661.8
Northeast
Goodwill [Roll Forward]
Impairment losses during year	(37.4)
Operating Segments | Northeast
Goodwill [Roll Forward]
Goodwill, gross, beginning balance		923.5
Accumulated goodwill impairment losses, beginning balance		(761.4)
Goodwill, net, beginning balance		162.1
Effect of foreign currency exchange rates		0.0
Impairment losses during year		(37.4)
Other		0.0
Goodwill, gross, ending balance	923.5	923.5
Accumulated goodwill impairment losses, ending balance	(798.8)	(798.8)
Goodwill, net, ending balance	124.7	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
Effect of foreign currency exchange rates		0.0
Impairment losses during year		0.0
Other		0.0
Goodwill, gross, ending balance	236.6	236.6
Accumulated goodwill impairment losses, ending balance	(61.0)	(61.0)
Goodwill, net, ending balance	175.6	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
Effect of foreign currency exchange rates		0.0
Impairment losses during year		0.0
Other		0.0
Goodwill, gross, ending balance	216.8	216.8
Accumulated goodwill impairment losses, ending balance	(16.6)	(16.6)
Goodwill, net, ending balance	200.2	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
Effect of foreign currency exchange rates		0.0
Impairment losses during year		0.0
Other		0.0
Goodwill, gross, ending balance	1,116.7	1,116.7
Accumulated goodwill impairment losses, ending balance	(556.1)	(556.1)
Goodwill, net, ending balance	560.6	560.6
Operating Segments | Interactive
Goodwill [Roll Forward]
Goodwill, gross, beginning balance		1,724.0
Accumulated goodwill impairment losses, beginning balance		0.0
Goodwill, net, beginning balance		1,724.0
Effect of foreign currency exchange rates		(124.8)
Impairment losses during year		0.0
Other		1.5
Goodwill, gross, ending balance	1,600.7	1,600.7
Accumulated goodwill impairment losses, ending balance	0.0	0.0
Goodwill, net, ending balance	1,600.7	1,600.7
Other
Goodwill [Roll Forward]
Goodwill, gross, beginning balance		87.7
Accumulated goodwill impairment losses, beginning balance		(87.7)
Goodwill, net, beginning balance		0.0
Effect of foreign currency exchange rates		0.0
Impairment losses during year		0.0
Other		0.0
Goodwill, gross, ending balance	87.7	87.7
Accumulated goodwill impairment losses, ending balance	(87.7)	(87.7)
Goodwill, net, ending balance	$ 0.0	$ 0.0