Statements of Consolidated Comprehensive Income - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net income		$ 1,541.3	$ 1,108.7	$ 1,727.9
Other comprehensive (loss) income, net of tax:
Foreign currency translation adjustments	[1]	(49.8)	(254.3)	148.0
Pension and other postretirement benefit adjustments:
Amounts recognized in Other comprehensive (loss) income	[2]	(5.1)	(13.5)	48.0
Amounts reclassified from Other comprehensive (loss) income	[3]	22.3	31.3	(7.8)
Pension and other postretirement benefit adjustments:		17.2	17.8	40.2
Unrealized net gains on available-for sale securities:
Amounts recognized in Other comprehensive (loss) income	[4]			2.1
Amounts reclassified from Other comprehensive (loss) income	[5]			(0.8)
Unrealized net gains on available-for sale securities:		0.0	0.0	1.3
Unrealized net (losses) gains on cash flow hedges
Amounts recognized in Other comprehensive (loss) income	[6]			(30.8)
Amounts reclassified from Other comprehensive (loss) income	[7]	(8.7)
Amounts reclassified from Other comprehensive (loss) income	[7]		(6.2)	(3.2)
Unrealized net (losses) gains on cash flow hedges		(8.7)
Unrealized net (losses) gains on cash flow hedges			(6.2)	(34.0)
Other comprehensive (loss) income, net of tax		(41.3)	(242.7)	155.5
Comprehensive income		1,500.0	866.0	1,883.4
Net actuarial gains (losses) and prior service costs arising during period, tax		1.3	6.8	(19.3)
Amortization of net actuarial gains (losses) and prior service costs included in Net pension costs, tax		(7.3)	(10.2)	4.7
Unrealized holding gains (losses) arising during period, tax				(1.2)
Reclassification adjustments for losses (gains) included in net income, tax				0.4
Unrealized holding losses on cash flow hedges, amounts recognized in other comprehensive loss, tax				18.8
Unrealized holding losses on cash flow hedges, amounts reclassified from other comprehensive loss, tax		2.8
Unrealized holding losses on cash flow hedges, amounts reclassified from other comprehensive loss, tax			$ 2.1	$ 2.0
Net Investment Hedging
Unrealized net (losses) gains on cash flow hedges
Foreign currency translation adjustments		$ 1.1

[1] The year ended December 31, 2019 includes unrealized gains of $1.1 million, net of taxes, related to the net investment hedge.

[2] Net of taxes of $1.3 million, $6.8 million and $(19.3) million in 2019, 2018 and 2017, respectively.

[3] Net of taxes of $(7.3) million, $(10.2) million and $4.7 million in 2019, 2018 and 2017, respectively.

[4] Net of taxes of $(1.2) million in 2017.

[5] Net of taxes of $0.4 million in 2017.

[6] Net of taxes of $18.8 million in 2017.

[7] Net of taxes of $2.8 million, $2.1 million and $2.0 million in 2019, 2018 and 2017, respectively.