Changes in Accumulated Other Comprehensive Income by Component (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, unrealized gains and (losses) on derivative contracts	$ (27.2)
Recorded into AOCI, unrealized gains and (losses) on derivative contracts	36.9
Reclassified out of AOCI, unrealized gains and (losses) on derivative contracts	(24.8)
Net current period OCI, unrealized gains and (losses) on derivative contracts	12.1	(5.2)	(4.1)
Ending balance, unrealized gains and (losses) on derivative contracts	(15.1)	(27.2)
Beginning balance, unrealized gains and (losses) on marketable debt securities	6.6
Recorded into AOCI, unrealized gains and (losses) on marketable debt securities	(6.1)
Reclassified out of AOCI, unrealized gains and (losses) on marketable debt securities	1.2
Net current period OCI, unrealized gains and (losses) on marketable debt securities	(4.9)		6.1
Ending balance, unrealized gains and (losses) on marketable debt securities	1.7	6.6
Beginning balance, pension plans	(496.5)
Recorded into AOCI, pension plans	204.8
Reclassified out of AOCI, pension plans	29.5
Net current period OCI, pension plans	234.3	(18.4)	(165.7)
Ending balance, pension plans	(262.2)	(496.5)
Beginning balance, foreign currency translation	357.6
Recorded into AOCI, foreign currency translation	(71.3)
Reclassified out of AOCI, foreign currency translation	(2.0)
Net current period OCI, foreign currency translation	(73.3)	83.1	(96.6)
Ending balance, foreign currency translation	284.3	357.6
Beginning balance	(159.5)
Recorded into AOCI	164.3
Reclassified out of AOCI	3.9
Net other comprehensive income (loss)	168.2	59.5	(260.3)
Ending balance	$ 8.7	$ (159.5)