Segment Reporting (Income From Operations and Total Assets) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income from operations	$ 204.0	$ 195.2
Amortization of intangibles	(15.3)	(17.5)
Impairment charges	36.0	0.0
Total assets	9,876.5		$ 9,182.1
Cash, cash equivalents and restricted cash	655.7		889.1
Investments in affiliates	423.2		413.5
Intangible assets, net	396.8		392.2
Goodwill	1,304.7		1,280.8
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income from operations	297.2	256.4
Total assets	6,000.1		5,210.1
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Corporate expenses	(32.2)	(35.9)
Amortization of intangibles	(15.3)	(17.5)
Stock compensation expense	(6.7)	(6.5)
Restructuring expenses	(3.0)	(1.3)
Impairment charges	(36.0)	$ 0.0
Cash, cash equivalents and restricted cash	655.7		889.1
Investments in affiliates	423.2		413.5
Deferred tax assets, other current and noncurrent assets	1,096.0		996.4
Intangible assets, net	396.8		392.2
Goodwill	$ 1,304.7		$ 1,280.8