Segment and Geographic Area Information - Schedule of Geographic Information for Sales (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales	$ 6,377	$ 6,239	$ 5,836	$ 5,454	$ 5,585	$ 5,765	$ 5,849	$ 5,833	$ 23,906	$ 23,032	$ 23,700
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									12,103	11,766	12,361
Spain [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									3,359	2,282	1,203
Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									3,028	3,240	3,222
Brazil [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									1,398	1,221	1,244
France [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									915	862	807
Russia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									642	683	713
Hungary [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									630	555	492
United Kingdom [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									464	475	438
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									415	259	326
Germany [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									229	230	216
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									150	157	379
Netherlands [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									36	524	949
Norway [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									31	283	820
Other Geographical Regions [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Sales									$ 506	$ 495	$ 530