Consolidated Statements of Stockholders' Equity (USD $) In Millions, unless otherwise specified	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, 2010	$ 1,905.5	$ 307.2	$ (425.7)	$ 568.2	$ 2,057.3	$ (605.0)	$ 1,902.0	$ 3.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	125.2	0	0	0		0	125.2	0
Foreign Currency Translation	(27.7)	0	0	0	0	(27.7)	(27.7)	0
Unrecognized pension and other postretirement benefit costs, net of tax	(75.9)	0	0	0	0	(75.9)	(75.9)	0
Gain (Loss) Derivatives Instruments, Net of Tax	1.6	0	0	0	0	1.6	1.6	0
Cash dividends on common stock	(84.9)	0	0	0	(84.9)	0	(84.9)	0
Stock-based compensation and other	36.0	1.2	(7.1)	42.2	(0.3)	0	36.0	0
Shares issued for exchange of convertible notes	44.7	2.3	0	42.4	0	0	44.7	0
Stock Repurchased and Retired During Period, Value	(46.1)	(3.4)	0	(42.7)	0	0	(46.1)	0	0	(2.0)	0	2.0	0	0	0	0
Extinguishment of equity component of convertible notes	(25.8)			(25.8)			(25.8)	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest at Dec. 31, 2011	1,852.6	305.3	(432.8)	586.3	2,097.3	(707.0)	1,849.1	3.5
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	401.3	0	0	0		0	401.3	0
Foreign Currency Translation	40.6	0	0	0	0	40.6	40.6	0
Unrecognized pension and other postretirement benefit costs, net of tax	(119.8)	0	0	0	0	(119.8)	(119.8)	0
Gain (Loss) Derivatives Instruments, Net of Tax	(2.8)	0	0	0	0	(2.8)	(2.8)	0
Cash dividends on common stock	(125.2)	0	0	0	(125.2)	0	(125.2)	0
Stock-based compensation and other	45.0	4.3	(15.2)	57.8	(1.9)	0	45.0	0
Stock Repurchased and Retired During Period, Value	(91.5)	(4.9)	0	(10.0)	(76.6)	0	(91.5)	0
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	474.6	0
Foreign Currency Translation	5.0	0	0	0	0	5.0	5.0	0
Unrecognized pension and other postretirement benefit costs, net of tax	137.8		0	0	0	137.8	137.8	0
Gain (Loss) Derivatives Instruments, Net of Tax	1.0	0	0	0	0	1.0	1.0	0
Cash dividends on common stock	(174.1)	0	0	0	(174.1)	0	(174.1)	0
Stock-based compensation and other	100.5	6.9	(29.2)	123.0	(0.2)	0	100.5	0
Stock Repurchased and Retired During Period, Value	(119.5)	(4.7)	0	(10.5)	(104.3)	0	(119.5)	0	(350.5)	(9.4)	0	(92.3)	(248.8)	0	(350.5)	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