Consolidated Statements of Equity - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Shareholders’ Equity	Noncontrolling Interests
Beginning Balance at Dec. 31, 2017			$ 828.3	$ 6,210.6	$ (963.0)	$ (3,505.4)		$ 537.1
Cumulative effect of accounting changes at Dec. 31, 2017				23.6	0.0			0.4
Net Income	$ 1,010.8			927.2				83.6
Other comprehensive income (loss)	(252.9)				(223.2)			(29.8)
Dividends to noncontrolling interests								(104.7)
Acquisition of noncontrolling interests			(36.4)					(34.8)
Increase in noncontrolling interests from business combinations								112.2
Change in temporary equity			(52.2)
Common stock dividends declared				(409.7)
Share-based compensation			53.8
Stock issued, share-based compensation			(50.2)			60.4
Common stock repurchased						(526.7)
Ending Balance at Sep. 30, 2018	$ 2,945.7	$ 44.6	743.3	6,751.7	(1,186.2)	(3,971.7)	$ 2,381.7	564.0
Dividends Declared Per Common Share	$ 1.80
Beginning Balance at Jun. 30, 2018			811.5	6,587.7	(1,167.3)	(3,955.1)		537.5
Cumulative effect of accounting changes at Jun. 30, 2018				0.0	0.0			0.0
Net Income	$ 331.3			298.9				32.4
Other comprehensive income (loss)	(23.8)				(18.9)			(5.0)
Dividends to noncontrolling interests								(47.4)
Acquisition of noncontrolling interests			1.4					(10.0)
Increase in noncontrolling interests from business combinations								56.5
Change in temporary equity			(50.2)
Common stock dividends declared				(134.9)
Share-based compensation			18.7
Stock issued, share-based compensation			(38.1)			40.9
Common stock repurchased						(57.5)
Ending Balance at Sep. 30, 2018	$ 2,945.7	$ 44.6	743.3	6,751.7	(1,186.2)	(3,971.7)	2,381.7	564.0
Dividends Declared Per Common Share	$ 0.60
Common Stock, shares		297.2
Beginning Balance at Dec. 31, 2018	$ 3,106.9		728.8	7,016.1	(1,228.5)	(4,013.9)		559.8
Cumulative effect of accounting changes at Dec. 31, 2018				22.3	(22.3)			0.0
Net Income	986.1			924.1				62.0
Other comprehensive income (loss)	(110.8)				(98.0)			(12.8)
Dividends to noncontrolling interests								(71.6)
Acquisition of noncontrolling interests			(19.5)					(29.4)
Increase in noncontrolling interests from business combinations								15.4
Change in temporary equity			24.5
Common stock dividends declared				(429.4)
Share-based compensation			53.5
Stock issued, share-based compensation			(58.7)			65.7
Common stock repurchased						(545.2)
Ending Balance at Sep. 30, 2019	$ 2,987.5	$ 44.6	728.6	7,533.1	(1,348.8)	(4,493.4)	2,464.1	523.4
Dividends Declared Per Common Share	$ 1.95
Beginning Balance at Jun. 30, 2019			726.2	7,384.7	(1,234.9)	(4,510.4)		549.2
Cumulative effect of accounting changes at Jun. 30, 2019				0.0	0.0			0.0
Net Income	$ 312.2			290.2				22.0
Other comprehensive income (loss)	(127.6)				(113.9)			(13.7)
Dividends to noncontrolling interests								(25.5)
Acquisition of noncontrolling interests			(21.6)					(23.0)
Increase in noncontrolling interests from business combinations								14.4
Change in temporary equity			36.6
Common stock dividends declared				(141.8)
Share-based compensation			19.2
Stock issued, share-based compensation			(31.8)			34.6
Common stock repurchased						(17.6)
Ending Balance at Sep. 30, 2019	$ 2,987.5	$ 44.6	$ 728.6	$ 7,533.1	$ (1,348.8)	$ (4,493.4)	$ 2,464.1	$ 523.4
Dividends Declared Per Common Share	$ 0.65
Common Stock, shares		297.2