Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	[1]	$ 6,777.6
Recorded into AOCI		29.3	$ 86.6
Reclassified out of AOCI		40.8	41.2
Net other comprehensive (loss) income		70.1	127.8
Ending balance		7,079.3
Derivative Contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(4.3)	(6.4)
Recorded into AOCI		(45.9)	(41.7)
Reclassified out of AOCI		36.3	37.2
Net other comprehensive (loss) income		(9.6)	(4.5)
Ending balance		(13.9)	(10.9)
Marketable Debt Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(0.3)	2.1
Recorded into AOCI		2.3	2.7
Reclassified out of AOCI		(0.2)	(0.5)
Net other comprehensive (loss) income		2.1	2.2
Ending balance		1.8	4.3
Pension Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(414.1)	(390.4)
Recorded into AOCI		(2.1)	0.1
Reclassified out of AOCI		4.7	4.5
Net other comprehensive (loss) income		2.6	4.6
Ending balance		(411.5)	(385.8)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(709.4)	(622.3)
Recorded into AOCI		75.0	125.5
Reclassified out of AOCI		0.0	0.0
Net other comprehensive (loss) income		75.0	125.5
Ending balance		(634.4)	(496.8)
ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(1,128.1)	(1,017.0)
Ending balance		$ (1,058.0)	$ (889.2)

[1] The December 31, 2016 consolidated balance sheet has been derived from audited financial statements.