Segment Reporting (Income From Operations and Total Assets) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Income from Operations
Income from operations	$ 105.9	$ 111.3	$ 397.9	$ 329.9
Amortization of intangibles	(14.9)	(15.3)	(45.6)	(49.2)
Income (loss) from operations	105.9	111.3	397.9	329.9
Total Assets
Total assets	8,079.2		8,079.2		$ 7,626.4
Cash and cash equivalents	282.0		282.0		326.1
Investments in affiliates	399.2		399.2		400.0
Intangible assets, net	518.7		518.7		573.1
Goodwill	1,456.0		1,456.0		1,495.5
Consolidated total assets	8,079.2		8,079.2		7,626.4
Operating Segments
Income from Operations
Income from operations	160.4	171.3	573.7	519.2
Income (loss) from operations	160.4	171.3	573.7	519.2
Total Assets
Total assets	4,787.8		4,787.8		4,175.1
Consolidated total assets	4,787.8		4,787.8		4,175.1
Segment Reconciling Items
Income from Operations
Corporate expenses	(30.5)	(33.5)	(95.2)	(99.4)
Stock compensation expense	(7.8)	(9.7)	(32.0)	(30.6)
Restructuring expenses	(1.3)	(1.5)	(3.0)	(10.1)
Amortization of intangibles	(14.9)	$ (15.3)	(45.6)	$ (49.2)
Total Assets
Cash and cash equivalents	282.0		282.0		326.1
Investments in affiliates	399.2		399.2		400.0
Deferred tax assets, other current and noncurrent assets	635.5		635.5		656.6
Intangible assets, net	518.7		518.7		573.1
Goodwill	$ 1,456.0		$ 1,456.0		$ 1,495.5