Equity (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Shareholding pattern
Beginning Balance			$ 2,246.6
Net income	82.8	183.4	157.8	339.4
Foreign currency translation adjustments	(18.4)	(39.4)	(34.5)	(16.0)
Pension and postretirement liability adjustment (net of the income tax benefit of $22.0 million)	27.2	9.7	56.8	22.0
Change in fair value of derivative financial instruments	0.4	0.4	1.2	1.4
Change in ownership of non-controlling interest			8.9
Dividends - $0.46 per share			(44.2)
Excess tax benefit from stock compensation			9.8
Stock-based compensation expense			8.4
Stock purchased at cost			81.8
Stock option exercise activity			5.4
Restricted shares surrendered (issued)			1.1
Shares surrendered for taxes			(7.7)
Ending Balance	2,327.8		2,327.8
Stated Capital [Member]
Shareholding pattern
Beginning Balance			53.1
Net income
Foreign currency translation adjustments
Pension and postretirement liability adjustment (net of the income tax benefit of $22.0 million)
Change in fair value of derivative financial instruments
Dividends - $0.46 per share
Excess tax benefit from stock compensation
Stock-based compensation expense
Stock purchased at cost
Stock option exercise activity
Restricted shares surrendered (issued)
Shares surrendered for taxes
Ending Balance	53.1		53.1
Other Paid-In Capital [Member]
Shareholding pattern
Beginning Balance			891.4
Net income
Foreign currency translation adjustments
Pension and postretirement liability adjustment (net of the income tax benefit of $22.0 million)
Change in fair value of derivative financial instruments
Change in ownership of non-controlling interest			2.7
Dividends - $0.46 per share
Excess tax benefit from stock compensation			9.8
Stock-based compensation expense			8.4
Stock purchased at cost
Stock option exercise activity			(19.1)
Restricted shares surrendered (issued)			(3.6)
Shares surrendered for taxes
Ending Balance	889.6		889.6
Earnings Invested in the Business [Member]
Shareholding pattern
Beginning Balance			2,411.2
Net income			157.9
Foreign currency translation adjustments
Pension and postretirement liability adjustment (net of the income tax benefit of $22.0 million)
Change in fair value of derivative financial instruments
Dividends - $0.46 per share			(44.2)
Excess tax benefit from stock compensation
Stock-based compensation expense
Stock purchased at cost
Stock option exercise activity
Restricted shares surrendered (issued)
Shares surrendered for taxes
Ending Balance	2,524.9		2,524.9
Accumulated Other Comprehensive (Loss) [Member]
Shareholding pattern
Beginning Balance			(1,013.2)
Net income
Foreign currency translation adjustments			(30.2)
Pension and postretirement liability adjustment (net of the income tax benefit of $22.0 million)			56.8
Change in fair value of derivative financial instruments			1.2
Dividends - $0.46 per share
Excess tax benefit from stock compensation
Stock-based compensation expense
Stock purchased at cost
Stock option exercise activity
Restricted shares surrendered (issued)
Shares surrendered for taxes
Ending Balance	(985.4)		(985.4)
Treasury Stock [Member]
Shareholding pattern
Beginning Balance			(110.3)
Net income
Foreign currency translation adjustments
Pension and postretirement liability adjustment (net of the income tax benefit of $22.0 million)
Change in fair value of derivative financial instruments
Dividends - $0.46 per share
Excess tax benefit from stock compensation
Stock-based compensation expense
Stock purchased at cost			81.8
Stock option exercise activity			24.5
Restricted shares surrendered (issued)			4.7
Shares surrendered for taxes			(7.7)
Ending Balance	(170.6)		(170.6)
Noncontrolling Interest [Member]
Shareholding pattern
Beginning Balance			14.4
Net income			(0.1)
Foreign currency translation adjustments			(4.3)
Pension and postretirement liability adjustment (net of the income tax benefit of $22.0 million)			0
Change in fair value of derivative financial instruments
Change in ownership of non-controlling interest			6.2
Dividends - $0.46 per share
Excess tax benefit from stock compensation
Stock-based compensation expense
Stock purchased at cost
Stock option exercise activity
Restricted shares surrendered (issued)
Shares surrendered for taxes
Ending Balance	$ 16.2		$ 16.2