Restructuring (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013		Jun. 30, 2014 Employee	Jun. 30, 2013
Restructuring Cost and Reserve [Line Items]
Number of employees terminated during the period				150
Restructuring Charges	$ 1	$ 15	[1]	$ 8	$ 25	[1]
Worldwide Restructuring Initiative [Member]
Restructuring Cost and Reserve [Line Items]
Number of employees terminated during the period				210
Restructuring Charges				8
Restructuring and Related Cost, Expected Cost				$ 13

[1] (c) Includes unallocated corporate overhead which is not attributable to a particular segment.