Components of Net Periodic Benefit Expense (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2.3	$ 2.3	$ 6.5	$ 8.4
Interest cost	91.3	98.1	272.7	294.1
Expected return on assets	(105.3)	(118.8)	(315.9)	(355.9)
Amortization of prior service cost	(0.1)	0.2	0.2	0.4
Recognized net actuarial loss	41.7	26.7	118.9	79.2
Curtailment gain			(5.7)
Net periodic pension expense	29.9	8.5	76.7	26.2
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	63.8	66.0	188.2	198.0
Expected return on assets	(71.4)	(84.4)	(214.3)	(253.1)
Amortization of prior service cost	0.1	0.1	0.5	0.5
Recognized net actuarial loss	31.9	19.7	91.8	58.9
Net periodic pension expense	24.4	1.4	66.2	4.3
International Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.3	2.3	6.5	8.4
Interest cost	27.5	32.1	84.5	96.1
Expected return on assets	(33.9)	(34.4)	(101.6)	(102.8)
Amortization of prior service cost	(0.2)	0.1	(0.3)	(0.1)
Recognized net actuarial loss	9.8	7.0	27.1	20.3
Curtailment gain			(5.7)
Net periodic pension expense	5.5	7.1	10.5	21.9
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.2	0.1	0.4	0.3
Interest cost	2.2	2.4	6.7	7.3
Expected return on assets	(0.1)	(0.1)	(0.4)	(0.4)
Amortization of prior service cost	0.4	0.5	1.3	1.4
Recognized net actuarial loss	1.1	1.0	3.3	3.0
Net periodic pension expense	$ 3.8	$ 3.9	$ 11.3	$ 11.6