Consolidated Statement of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Comprehensive Income
Net Income	$ 1,975.4	$ 1,894.4	$ 1,273.3
Other Comprehensive Items:
Currency translation adjustment	(706.1)	(1,182.6)	24.6
Unrealized gains on available-for-sale investments:
Unrealized holding gains arising during the period (net of tax provision of $0.0, $0.1 and $0.5)	0.5	1.7	1.6
Reclassification adjustment for gains included in net income (net of tax provision of $0.2 and $2.5)	0.0	(1.7)	(8.0)
Unrealized gains and losses on hedging instruments:
Unrealized (losses) gains on hedging instruments (net of tax (benefit) provision of ($5.5) and $3.6)	(9.0)	0.0	5.8
Reclassification adjustment for losses included in net income (net of tax benefit of $1.5, $1.8 and $2.2)	3.3	3.0	3.2
Pension and other postretirement benefit liability adjustments:
Pension and other postretirement benefit liability adjustments arising during the period (net of tax (benefit) provision of ($5.0), ($26.5) and $20.3)	(9.0)	(52.2)	38.2
Amortization of net loss and prior service benefit included in net periodic pension cost (net of tax benefit of $2.9, $13.3 and $3.6)	8.0	24.0	7.8
Total other comprehensive items	(712.3)	(1,207.8)	73.2
Comprehensive Income	$ 1,263.1	$ 686.6	$ 1,346.5