Equity (Components of Shareholders' Equity) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Payments for Repurchase of Common Stock	$ 250.1	$ 250.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	6,718.3	5,879.2
Net earnings	121.1	155.6
Currency translation	110.9	131.4
Change in value of marketable securities and derivatives qualifying as cash flow hedges, net of tax	1.6	1.1
Pension and OPEB adjustments, net of tax	6.6	10.4
Total comprehensive income (loss)	240.2	298.5
Share-based compensation	23.3	21.9
Dividends declared to noncontrolling interests	(6.9)	(6.7)
Dividends declared to ordinary shareholders	(103.0)	(82.2)
Shares issued under incentive plans, net	16.8	6.7
Repurchase of ordinary shares	(250.1)	(250.1)
Ending balance	6,653.9	5,852.7
Other items, net	0.2
Other		1.2
Shareholders' Equity [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	6,643.8	5,816.7
Net earnings	117.1	152.4
Currency translation	112.4	130.5
Change in value of marketable securities and derivatives qualifying as cash flow hedges, net of tax	1.6	1.1
Pension and OPEB adjustments, net of tax	6.6	10.4
Total comprehensive income (loss)	237.7	294.4
Share-based compensation	23.3	21.9
Dividends declared to noncontrolling interests	0.0	0.0
Dividends declared to ordinary shareholders	(103.0)	(82.2)
Shares issued under incentive plans, net	16.8	6.7
Repurchase of ordinary shares	(250.1)	(250.1)
Ending balance	6,583.8	5,792.8
Other items, net	0.2
Other		1.2
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	74.5	62.5
Net earnings	4.0	3.2
Currency translation	(1.5)	0.9
Change in value of marketable securities and derivatives qualifying as cash flow hedges, net of tax	0.0	0.0
Pension and OPEB adjustments, net of tax	0.0	0.0
Total comprehensive income (loss)	2.5	4.1
Share-based compensation	0.0	0.0
Dividends declared to noncontrolling interests	(6.9)	(6.7)
Dividends declared to ordinary shareholders	0.0	0.0
Shares issued under incentive plans, net	0.0	0.0
Repurchase of ordinary shares	0.0	0.0
Ending balance	70.1	59.9
Other items, net
Other		$ 0.0