Income Taxes - Additional Information (Detail) (USD $)	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
Income Taxes [Line Items]
Provision for income taxes, net	$ (205,000,000)	[1]	$ 205,000,000	[1]	$ (94,000,000)	[1]	$ (73,000,000)	[1]	$ (179,000,000)	[1]	$ 12,000,000	[1]	$ (13,000,000)	[1]	$ 18,000,000	[1]	$ 167,000,000	$ 161,000,000	$ 428,000,000
Cash taxes paid, net of refunds																	177,000,000	169,000,000	112,000,000
Undistributed earnings of foreign subsidiaries that are indefinitely invested outside of the U.S	2,500,000,000																2,500,000,000
Tax credit carryforwards for income tax purposes	506,000,000																506,000,000
Tax credit carryforwards for income tax purposes, beginning expiration year																	Dec. 31, 2017
Accrrued interest and penalties, net of federal income tax benefit, related to tax contingencies	41,000,000								33,000,000								41,000,000	33,000,000
Interest and penalties, net of federal income tax benefit																	8,000,000	8,000,000	1,000,000
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Net operating loss carryforwards	1,900,000,000																1,900,000,000
Operating loss carryforwards, beginning expiration year																	Dec. 31, 2020
Description of the status of the tax examination																	We are under examination, or may be subject to examination, by the Internal Revenue Service (“IRS”) for the calendar year 2005 and thereafter.
Tax examination, estimate of additional tax expense																	1,500,000,000
Foreign Country
Income Taxes [Line Items]
Net operating loss carryforwards	2,500,000,000																2,500,000,000
Operating loss carryforwards, beginning expiration year																	Dec. 31, 2015
Description of the status of the tax examination																	We are also subject to taxation in various states and other foreign jurisdictions including Canada, China, Germany, India, Japan, Luxembourg, and the United Kingdom.
Income tax examination, beginning examination year																	2003
State
Income Taxes [Line Items]
Net operating loss carryforwards	1,100,000,000																1,100,000,000
Operating loss carryforwards, beginning expiration year																	Dec. 31, 2015
France
Income Taxes [Line Items]
Description of the status of the tax examination																	Certain of our subsidiaries are under examination or investigation or may be subject to examination or investigation by the French Tax Administration (“FTA”) for calendar year 2006 or thereafter.
Tax examination, estimate of additional tax expense																	$ 250,000,000
European Union
Income Taxes [Line Items]
Description of the status of the tax examination																	In addition, in October 2014, the European Commission opened a formal investigation to examine whether decisions by the tax authorities in Luxembourg with regard to the corporate income tax paid by certain of our subsidiaries comply with European Union rules on state aid.

[1] The sum of quarterly amounts, including per share amounts, may not equal amounts reported for year-to-date periods. This is due to the effects of rounding and changes in the number of weighted-average shares outstanding for each period.