Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2016	Mar. 31, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	[1]	$ 6,940.4
Reclassified out of AOCI		(41.2)	$ 14.9
Net other comprehensive income (loss)		127.8	(337.5)
Ending balance		6,343.2
Derivative Contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(6.4)	(13.5)
Recorded into AOCI		(41.7)	21.3
Reclassified out of AOCI		37.2	(21.1)
Net other comprehensive income (loss)		(4.5)	0.2
Ending balance		(10.9)	(13.3)
Marketable Debt Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		2.1	5.3
Recorded into AOCI		2.7	0.9
Reclassified out of AOCI		(0.5)	(0.6)
Net other comprehensive income (loss)		2.2	0.3
Ending balance		4.3	5.6
Pension Plan
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(390.4)	(433.1)
Recorded into AOCI		0.1	8.1
Reclassified out of AOCI		4.5	6.8
Net other comprehensive income (loss)		4.6	14.9
Ending balance		(385.8)	(418.2)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(622.3)	(138.5)
Recorded into AOCI		125.5	(352.9)
Net other comprehensive income (loss)		125.5	(352.9)
Ending balance		(496.8)	(491.4)
ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(1,017.0)	(579.8)
Recorded into AOCI		86.6	(322.6)
Reclassified out of AOCI		41.2	(14.9)
Net other comprehensive income (loss)		127.8	(337.5)
Ending balance		$ (889.2)	$ (917.3)

[1] The December 31, 2015 consolidated balance sheet has been derived from audited financial statements.