Changes in Accumulated Other Comprehensive Income (Loss) by Component (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	[1]			$ 6,940.4
Recorded into AOCI		$ (33.8)	$ 82.3	52.8	$ (240.3)
Reclassified out of AOCI		(4.1)	25.4	37.1	10.5
Net other comprehensive (loss) income		(37.9)	107.7	89.9	(229.8)
Ending balance		6,709.7		6,709.7
Derivative Contracts
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(10.9)	(13.3)	(6.4)	(13.5)
Recorded into AOCI		15.7	(16.4)	(26.0)	4.9
Reclassified out of AOCI		(8.8)	18.6	28.4	(2.5)
Net other comprehensive (loss) income		6.9	2.2	2.4	2.4
Ending balance		(4.0)	(11.1)	(4.0)	(11.1)
Marketable Debt Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		4.3	5.6	2.1	5.3
Recorded into AOCI		2.1	(1.9)	4.8	(1.0)
Reclassified out of AOCI		(0.3)	(0.2)	(0.8)	(0.8)
Net other comprehensive (loss) income		1.8	(2.1)	4.0	(1.8)
Ending balance		6.1	3.5	6.1	3.5
Pension Plans
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(385.8)	(418.2)	(390.4)	(433.1)
Recorded into AOCI		5.6	(6.3)	5.7	1.8
Reclassified out of AOCI		5.0	7.0	9.5	13.8
Net other comprehensive (loss) income		10.6	0.7	15.2	15.6
Ending balance		(375.2)	(417.5)	(375.2)	(417.5)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(496.8)	(491.4)	(622.3)	(138.5)
Recorded into AOCI		(57.2)	106.9	68.3	(246.0)
Reclassified out of AOCI		0.0	0.0	0.0	0.0
Net other comprehensive (loss) income		(57.2)	106.9	68.3	(246.0)
Ending balance		(554.0)	(384.5)	(554.0)	(384.5)
ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME:
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance		(889.2)	(917.3)	(1,017.0)	(579.8)
Ending balance		$ (927.1)	$ (809.6)	$ (927.1)	$ (809.6)

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