Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Common Stock [Member]	Treasury Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Stockholders' Equity Attributable to Parent [Member]	Noncontrolling Interest [Member]	Accelerated Stock Buyback Program [Member]	Accelerated Stock Buyback Program [Member] Common Stock [Member]	Accelerated Stock Buyback Program [Member] Treasury Stock [Member]	Accelerated Stock Buyback Program [Member] Additional Paid-in Capital [Member]	Accelerated Stock Buyback Program [Member] Retained Earnings [Member]	Accelerated Stock Buyback Program [Member] Accumulated Other Comprehensive Income (Loss) [Member]	Accelerated Stock Buyback Program [Member] Stockholders' Equity Attributable to Parent [Member]	Accelerated Stock Buyback Program [Member] Noncontrolling Interest [Member]
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2012	$ 2,000.2	$ 304.7	$ (448.0)	$ 634.1	$ 2,294.9	$ (789.0)	$ 1,996.7	$ 3.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	474.6	0.0	0.0	0.0	474.6	0.0	474.6	0.0
Foreign Currency Translation	5.0	0.0	0.0	0.0	0.0	5.0	5.0	0.0
Unrecognized pension and other postretirement benefit costs, net of tax	137.8	0.0	0.0	0.0	0.0	137.8	137.8	0.0
Gain (Loss) Derivatives Instruments, Net of Tax	1.0	0.0	0.0	0.0	0.0	1.0	1.0	0.0
Cash dividends on common stock	(174.1)	0.0	0.0	0.0	(174.1)	0.0	(174.1)	0.0
Stock-based compensation and other	100.5	6.9	(29.2)	123.0	(0.2)	0.0	100.5	0.0
Stock Repurchased and Retired During Period, Value	(119.5)	(4.7)	0.0	(10.5)	(104.3)	0.0	(119.5)	0.0	$ (350.5)	$ (9.4)	$ 0.0	$ (92.3)	$ (248.8)	$ 0.0	$ (350.5)	$ 0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2013	2,075.0	297.5	(477.2)	654.3	2,242.1	(645.2)	2,071.5	3.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	377.8	0.0	0.0	0.0	377.8	0.0	377.8	0.0
Foreign Currency Translation	(126.3)	0.0	0.0	0.0	0.0	(126.3)	(126.3)	0.0
Unrecognized pension and other postretirement benefit costs, net of tax	(28.4)	0.0	0.0	0.0	0.0	(28.4)	(28.4)	0.0
Gain (Loss) Derivatives Instruments, Net of Tax	5.5	0.0	0.0	0.0	0.0	5.5	5.5	0.0
Cash dividends on common stock	(182.5)	0.0	0.0	0.0	(182.5)	0.0	(182.5)	0.0
Stock-based compensation and other	97.0	4.5	(15.9)	109.7	(1.3)	0.0	97.0	0.0
Stock Repurchased and Retired During Period, Value	(363.2)	(11.3)	0.0	(27.0)	(324.9)	0.0	(363.2)	0.0	$ 0.0	$ (2.0)	$ 0.0	$ 2.0	$ 0.0	$ 0.0	$ 0.0	$ 0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2014	1,854.9	288.7	(493.1)	739.0	2,111.2	(794.4)	1,851.4	3.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	350.0	0.0	0.0	0.0	350.0	0.0	350.0	0.0
Foreign Currency Translation	(123.9)	0.0	0.0	0.0	0.0	(123.9)	(123.9)	0.0
Unrecognized pension and other postretirement benefit costs, net of tax	89.4	0.0	0.0	0.0	0.0	89.4	89.4	0.0
Gain (Loss) Derivatives Instruments, Net of Tax	(4.9)	0.0	0.0	0.0	0.0	(4.9)	(4.9)	0.0
Cash dividends on common stock	(206.3)	0.0	0.0	0.0	(206.3)	0.0	(206.3)	0.0
Stock-based compensation and other	47.6	3.3	(30.0)	74.2	0.1	0.0	47.6	0.0
Stock Repurchased and Retired During Period, Value	(180.4)	(4.5)	0.0	(11.8)	(164.1)	0.0	(180.4)	0.0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2015	$ 1,826.4	$ 287.5	$ (523.1)	$ 801.4	$ 2,090.9	$ (833.8)	$ 1,822.9	$ 3.5