Comprehensive Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011
Comprehensive Income [Abstract]
Net income per Consolidated Condensed Statement of Comprehensive Income	$ 223.6	$ 164.5	$ 532.2	$ 422.1
Foreign currency translation gain (loss)	49.6	(152.3)	45.1	(56.0)
Amortization of net prior service credits related to the Company's pension and postretirement benefit plans, net of tax	(0.2)	(0.1)	(0.6)	(0.4)
Amortization of net actuarial losses related to the Company's pension and postretirement benefit plans, net of tax	0.7	1.4	5.5	4.2
Change in fair value of derivatives accounted for as cash flow hedges, net of tax	2.4	(4.4)	3.5	1.8
Comprehensive income	276.1	9.1	585.7	371.7
Accumulated foreign currency translation gain (loss)	16.4		16.4		(28.7)
Prior service credits, net, related to the Company's pension and postretirement benefit plans, net of tax	3.5		3.5		4.1
Actuarial losses, net, related to the Company's pension and postretirement benefit plans, net of tax	(54.8)		(54.8)		(60.3)
Change in fair value of derivatives accounted for as cash flow hedges, net of tax	(2.4)		(2.4)		(5.9)
Accumulated other elements of comprehensive income (loss)	$ (37.3)		$ (37.3)		$ (90.8)