Consolidated Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions	Common Stock	Additional Paid in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Treasury Stock	Noncontrolling Interests	Total
Balance at beginning of period at Dec. 31, 2012	$ 0.3	$ 336.5	$ 2,210.2	$ (117.0)		$ 12.2	$ 2,442.2
Balance (in shares) at Dec. 31, 2012	320
Increase (Decrease) In Shareholders' Equity
Net income			635.7			3.0	638.7
Other comprehensive income (loss)				61.7		0.5	62.2
Purchase of noncontrolling interest		0.7		0.3		(1.0)
Acquisition resulting in noncontrolling interest						10.3	10.3
Distributions to shareholders of noncontrolling interests						(4.4)	(4.4)
Purchase of treasury stock					$ (324.7)		(324.7)
Retirement of treasury stock			(324.7)		324.7
Retirement of treasury stock (in shares)	(9)
Stock options exercised, including tax benefit		116.5					116.5
Stock options exercised, including tax benefit (in shares)	5
Dividends declared			(96.8)				(96.8)
Stock-based compensation expense		36.1					36.1
Balance at end of period at Dec. 31, 2013	$ 0.3	489.8	2,424.4	(55.0)		20.6	2,880.1
Balance (in shares) at Dec. 31, 2013	316
Increase (Decrease) In Shareholders' Equity
Net income			709.1			6.1	715.2
Other comprehensive income (loss)				(150.8)		(0.5)	(151.3)
Acquisition resulting in noncontrolling interest						7.9	7.9
Distributions to shareholders of noncontrolling interests						(3.6)	(3.6)
Purchase of treasury stock					(539.4)		(539.4)
Retirement of treasury stock			(539.4)		539.4
Retirement of treasury stock (in shares)	(11)
Stock options exercised, including tax benefit		128.2					128.2
Stock options exercised, including tax benefit (in shares)	5
Dividends declared			(140.6)				(140.6)
Stock-based compensation expense		41.4					41.4
Balance at end of period at Dec. 31, 2014	$ 0.3	659.4	2,453.5	(205.8)		30.5	2,937.9
Balance (in shares) at Dec. 31, 2014	310
Increase (Decrease) In Shareholders' Equity
Net income			763.5			8.8	772.3
Other comprehensive income (loss)				(143.7)		(1.2)	(144.9)
Acquisition resulting in noncontrolling interest						7.9	7.9
Distributions to shareholders of noncontrolling interests						(6.1)	(6.1)
Purchase of treasury stock					(248.9)		(248.9)
Retirement of treasury stock			(248.9)		$ 248.9
Retirement of treasury stock (in shares)	(5)
Stock options exercised, including tax benefit		79.7					79.7
Stock options exercised, including tax benefit (in shares)	3
Dividends declared			(163.7)				(163.7)
Stock-based compensation expense		44.2					44.2
Balance at end of period at Dec. 31, 2015	$ 0.3	$ 783.3	$ 2,804.4	$ (349.5)		$ 39.9	$ 3,278.4
Balance (in shares) at Dec. 31, 2015	308