Derivative Pretax Amounts Affecting Income and Other Comprehensive Income (Detail) (USD $) In Millions	9 Months Ended
	Sep. 30, 2011		Sep. 30, 2010
Interest rate | Derivatives in Fair Value Hedging Relationships
Derivative [Line Items]
Gain (Loss) Recognized in Income on Derivative	$ (6.8)		$ 24.5
Hedged Items in Fair Value Hedging Relationships	Fixed-rate debt		Fixed-rate debt
Gain (Loss) Recognized in Income on Related Hedged Items	6.8		(24.5)
Foreign currency | Derivatives in Cash Flow Hedging Relationships
Derivative [Line Items]
Gain (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion)	(4.3)		13.8
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(3.2)		10.5
Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing and Ineffective Portion)	(6.1)		(22.1)
Interest rate | Derivatives in Cash Flow Hedging Relationships
Derivative [Line Items]
Gain (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion)	(10.5)	[1]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	1.7	[1]	0.5	[1]
Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing and Ineffective Portion)			0.3	[1]
Derivatives in Cash Flow Hedging Relationships
Derivative [Line Items]
Gain (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion)	(14.8)		13.8
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(1.5)		11.0
Gain (Loss) Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing and Ineffective Portion)	(6.1)		(21.8)
Net Investment Hedging Relationships
Derivative [Line Items]
Gain (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion)	(83.0)		(91.1)
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(8.2)
Net Investment Hedging Relationships | Foreign currency denominated debt
Derivative [Line Items]
Gain (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion)	(73.6)		(86.8)
Net Investment Hedging Relationships | Foreign currency derivatives
Derivative [Line Items]
Gain (Loss) Recognized in Accumulated OCI on Derivative (Effective Portion)	(9.4)	[2]	(4.3)	[2]
Gain (Loss) Reclassified from Accumulated OCI into Income (Effective Portion)	(8.2)	[2]
Foreign currency | Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Gain (Loss) Recognized in Income on Derivative	(5.6)		10.1
Interest rate | Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Gain (Loss) Recognized in Income on Derivative	1.5
Equity | Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Gain (Loss) Recognized in Income on Derivative	16.9	[3]	15.7	[3]
Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Gain (Loss) Recognized in Income on Derivative	$ 12.8		$ 25.8

[1] The amount of gain (loss) reclassified from accumulated OCI into income is recorded in Interest expense.

[2] The amount of gain (loss) reclassified from accumulated OCI into income is recorded in Impairment and other charges (credits), net.

[3] The amount of gain (loss) recognized in income on the derivatives used to hedge the supplemental benefit plan liabilities is recorded in Selling, general & administrative expenses.