Equity (Components of Shareholders' Equity) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 7,131.3	$ 7,229.3	$ 7,229.3
Net earnings	83.6	94.6	653.9
Currency translation	(41.7)	(103.6)
Change in value of marketable securities and derivatives qualifying as cash flow hedges, net of tax	2.4	(8.6)
Pension and OPEB adjustments, net of tax	4.6	27.2
Total comprehensive income (loss)	48.9	9.6	951.9
Share-based compensation	25.8	21.5
Dividends declared to noncontrolling interests	(3.8)	(2.8)
Dividends declared to ordinary shareholders	(68.3)	(0.8)
Shares issued under incentive plans, net	3.5	90.7
Repurchase of ordinary shares	(787.7)
Ending balance	6,349.7	7,347.5	7,131.3
Shareholders' Equity [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	7,068.9	7,147.8	7,147.8
Net earnings	79.0	88.0
Currency translation	(43.0)	(104.8)
Change in value of marketable securities and derivatives qualifying as cash flow hedges, net of tax	2.4	(8.6)
Pension and OPEB adjustments, net of tax	4.6	27.2
Total comprehensive income (loss)	43.0	1.8
Share-based compensation	25.8	21.5
Dividends declared to noncontrolling interests	0	0
Dividends declared to ordinary shareholders	(68.3)	(0.8)
Shares issued under incentive plans, net	3.5	90.7
Repurchase of ordinary shares	(787.7)
Ending balance	6,285.2	7,261.0
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	62.4	81.5	81.5
Net earnings	4.6	6.6
Currency translation	1.3	1.2
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	0
Total comprehensive income (loss)	5.9	7.8
Share-based compensation	0	0
Dividends declared to noncontrolling interests	(3.8)	(2.8)
Dividends declared to ordinary shareholders	0	0
Shares issued under incentive plans, net	0	0
Repurchase of ordinary shares	0
Ending balance	$ 64.5	$ 86.5