Equity (Components of Shareholders' Equity) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Payments for Repurchase of Common Stock			$ 911.1	$ 250.1
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			6,718.3	5,879.2
Net earnings	$ 371.9	$ 381.9	855.2	1,289.9
Currency translation			400.4	48.7
Change in value of marketable securities and derivatives qualifying as cash flow hedges, net of tax			1.1	3.0
Pension and OPEB adjustments, net of tax			11.1	41.6
Total comprehensive income (loss)	488.5	408.4	1,267.8	1,383.2
Share-based compensation			53.2	49.7
Dividends declared to noncontrolling interests			(15.5)	(13.8)
Dividends declared to ordinary shareholders			(318.0)	(247.5)
Shares issued under incentive plans, net			(41.9)	(30.5)
Repurchase of ordinary shares			(911.1)	(250.1)
Ending balance	6,844.4	6,831.1	6,844.4	6,831.1
Proceeds and Excess Tax Benefit from Share-based Compensation			15.1
Other				0.1
Noncontrolling Interest, Period Increase (Decrease)			(7.3)
Shareholders' Equity [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			6,643.8	5,816.7
Net earnings			842.7	1,277.4
Currency translation			401.4	42.9
Change in value of marketable securities and derivatives qualifying as cash flow hedges, net of tax			1.1	3.0
Pension and OPEB adjustments, net of tax			11.1	41.6
Total comprehensive income (loss)			1,256.3	1,364.9
Share-based compensation			53.2	49.7
Dividends declared to noncontrolling interests			0.0	0.0
Dividends declared to ordinary shareholders			(318.0)	(247.5)
Shares issued under incentive plans, net			(41.9)	(30.5)
Repurchase of ordinary shares			(911.1)	(250.1)
Ending balance	6,776.2	6,764.1	6,776.2	6,764.1
Proceeds and Excess Tax Benefit from Share-based Compensation			15.1
Other				0.1
Noncontrolling Interest, Period Increase (Decrease)			(5.0)
Noncontrolling Interest [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			74.5	62.5
Net earnings			12.5	12.5
Currency translation			(1.0)	5.8
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)			11.5	18.3
Share-based compensation			0.0	0.0
Dividends declared to noncontrolling interests			(15.5)	(13.8)
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	$ 68.2	$ 67.0	68.2	67.0
Proceeds and Excess Tax Benefit from Share-based Compensation			0.0
Other				$ 0.0
Noncontrolling Interest, Period Increase (Decrease)			$ (2.3)