Equity (Components of Shareholders' Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Balance at December 31:			$ 7,229.3	$ 7,012.4
Net earnings	180.9	327.0	600.1	802.2
Currency translation			(5.5)	48.1
Change in value of marketable securities and derivatives qualifying as cash flow hedges, net of tax			18.6	5.2
Pension and OPEB adjustments, net of tax			32.0	57.0
Total comprehensive income (loss)	311.6	485.7	645.2	912.5
Share-based compensation			53.8	34.7
Settlement of Exchangeable Senior Notes				(4.5)
Acquisition/divestiture of noncontrolling interests				(0.4)
Dividends declared to noncontrolling interests			(15.8)	(12.3)
Dividends declared to ordinary shareholders			(123.0)	(98.5)
Accretion of Exchangeable Senior Notes from Temporary Equity				3.3
Shares issued under incentive plans, net			192.3	57.7
Repurchase of ordinary shares			(795.2)	(374.9)
Balance at June 30:	7,186.6	7,530.0	7,186.6	7,530.0
Shareholders' Equity [Member]
Balance at December 31:			7,147.8	6,924.3
Net earnings			571.1	783.0
Currency translation			(2.7)	58.4
Change in value of marketable securities and derivatives qualifying as cash flow hedges, net of tax			18.6	5.2
Pension and OPEB adjustments, net of tax			32.0	58.3
Total comprehensive income (loss)			619.0	904.9
Share-based compensation			53.8	34.7
Settlement of Exchangeable Senior Notes				(4.5)
Acquisition/divestiture of noncontrolling interests				(1.2)
Dividends declared to noncontrolling interests			0	0
Dividends declared to ordinary shareholders			(123.0)	(98.5)
Accretion of Exchangeable Senior Notes from Temporary Equity				3.3
Shares issued under incentive plans, net			192.3	57.7
Repurchase of ordinary shares			(795.2)	(374.9)
Balance at June 30:	7,094.7	7,445.8	7,094.7	7,445.8
Noncontrolling Interest [Member]
Balance at December 31:			81.5	88.1
Net earnings			29.0	19.2
Currency translation			(2.8)	(10.3)
Change in value of marketable securities and derivatives qualifying as cash flow hedges, net of tax			0	0
Pension and OPEB adjustments, net of tax			0	(1.3)
Total comprehensive income (loss)			26.2	7.6
Share-based compensation			0	0
Settlement of Exchangeable Senior Notes				0
Acquisition/divestiture of noncontrolling interests				0.8
Dividends declared to noncontrolling interests			(15.8)	(12.3)
Dividends declared to ordinary shareholders			0	0
Accretion of Exchangeable Senior Notes from Temporary Equity				0
Shares issued under incentive plans, net			0	0
Repurchase of ordinary shares			0	0
Balance at June 30:	$ 91.9	$ 84.2	$ 91.9	$ 84.2