Restructuring of Operations - Accrued Restructuring Costs Activity (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Restructuring Reserve [Roll Forward]
Beginning balance	$ 25	$ 40	$ 33
Charges to restructuring	23	34	51
Adjustments of accruals	(2)	(10)	(4)
Discontinued operations charges		1	3
Non-cash write-off			(2)
Cash payments	(26)	(40)	(41)
Currency impact	1
Ending Balance	21	25	40
Employee Termination Benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	14	27	30
Charges to restructuring	17	23	31
Adjustments of accruals	(2)	(9)	(4)
Discontinued operations charges
Non-cash write-off
Cash payments	(18)	(27)	(30)
Currency impact	1
Ending Balance	12	14	27
Exit Costs [Member]
Restructuring Reserve [Roll Forward]
Beginning balance	11	13	3
Charges to restructuring	6	11	20
Adjustments of accruals		(1)
Discontinued operations charges		1	3
Non-cash write-off			(2)
Cash payments	(8)	(13)	(11)
Currency impact
Ending Balance	$ 9	$ 11	$ 13