Components of Change in Projected Benefit Obligation and Change in Plan Assets (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Change in projected benefit obligation:
Benefit obligation, beginning balance	$ 2,068.0	$ 1,808.1
Service cost	73.5	64.1	45.5
Interest cost	81.0	81.4	81.6
Benefits paid	(68.4)	(71.1)
Actuarial (gain) loss	(199.2)	163.8
Currency translation and other	3.2	18.3
Participant contributions	3.5	3.4
Projected benefit obligation, ending balance	1,961.6	2,068.0	1,808.1
Change in plan assets:
Fair value of plan assets, beginning balance	1,901.0	1,549.9
Employer contributions	26.2	190.8
Actual return on plan assets	242.5	208.8
Benefits paid	(68.4)	(71.1)
Currency translation and other	3.6	19.2
Participant contributions	3.5	3.4
Fair value of plan assets, ending balance	2,108.4	1,901.0	1,549.9
Funded status,ending balance	146.8	(167.0)
Other noncurrent assets	217.7	10.0
Other liabilities	70.9	177.0
Accumulated other comprehensive (income) loss:
Actuarial loss	257.0	490.4
Prior service cost	4.9	5.7
Net initial transition amount	$ 0.3	$ 0.4