Changes in Accumulated Other Comprehensive Income by Component (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013		Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance, gains and losses on cash flow hedges			$ (27.2)
Amounts recorded in AOCI, gains and losses on cash flow hedges			27.3
Amounts reclassified out of AOCI, gains and losses on cash flow hedges			(20.8)
Net current period OCI, gains and losses on cash flow hedges	(2.7)	(2.4)	6.5		(6.9)
Ending balance, gains and losses on cash flow hedges	(20.7)		(20.7)
Beginning balance, unrealized gains and losses on available-for-sales securities			6.6
Amounts recorded in AOCI, unrealized gains and losses on available-for-sales securities			(5.1)
Amounts reclassified out of AOCI, unrealized gains and losses on available-for-sales securities			1.0
Net current period OCI, unrealized gains and losses on available-for-sales securities	0.1	0.8	(4.1)		2.7
Ending balance, unrealized gains and losses on available-for-sales securities	2.5		2.5
Beginning balance, defined benefit pension plans			(496.5)
Amounts recorded in AOCI, defined benefit pension plans			2.1
Amounts reclassified out of AOCI, defined benefit pension plans			22.1
Employee benefit plans, net of tax	1.0	3.0	24.2		16.0
Ending balance, defined benefit pension plans	(472.3)		(472.3)
Beginning balance, foreign currency translation			357.6
Amounts recorded in AOCI, foreign currency translation			(56.2)
Amounts reclassified out of AOCI, foreign currency translation			(2.0)
Net current period OCI, foreign currency translation	120.4	73.9	(58.2)		46.6
Ending balance, foreign currency translation	299.4		299.4
Beginning balance			(159.5)	[1]
Amounts recorded in AOCI			(31.9)
Amounts reclassified out of AOCI			0.3
Net current period OCI			(31.6)
Ending balance	$ (191.1)		$ (191.1)

[1] The December 31, 2012 consolidated balance sheet has been derived from audited financial statements.