Components of Net Periodic Benefit Expense (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2.1	$ 2.6	$ 6.4	$ 7.8
Interest cost	91.4	82.0	276.0	244.3
Expected return on assets	(111.8)	(108.5)	(337.4)	(323.9)
Amortization of prior service (benefit) cost	(1.1)	(0.8)	(1.7)	(1.2)
Recognized net actuarial loss	37.5	48.1	112.8	142.4
Curtailment gain			(0.6)
Net periodic pension expense	18.1	23.4	55.5	69.4
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Interest cost	61.6	55.3	186.3	165.1
Expected return on assets	(71.3)	(73.0)	(215.3)	(218.7)
Amortization of prior service (benefit) cost	(0.5)	0.2	(0.1)	0.5
Recognized net actuarial loss	27.5	35.1	82.3	104.1
Net periodic pension expense	17.3	17.6	53.2	51.0
International Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	2.1	2.6	6.4	7.8
Interest cost	29.8	26.7	89.7	79.2
Expected return on assets	(40.5)	(35.5)	(122.1)	(105.2)
Amortization of prior service (benefit) cost	(0.6)	(1.0)	(1.6)	(1.7)
Recognized net actuarial loss	10.0	13.0	30.5	38.3
Curtailment gain			(0.6)
Net periodic pension expense	0.8	5.8	2.3	18.4
Other Postretirement Benefit Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	0.2	0.2	0.5	0.5
Interest cost	2.0	2.0	6.0	6.0
Expected return on assets	(0.1)	(0.2)	(0.4)	(0.4)
Amortization of prior service (benefit) cost	0.4	0.5	1.3	1.4
Recognized net actuarial loss	0.8	1.4	2.5	4.1
Net periodic pension expense	$ 3.3	$ 3.9	$ 9.9	$ 11.6