Income Taxes - Additional Information (Detail) € in Millions, $ in Millions	3 Months Ended																12 Months Ended
	Dec. 31, 2015 USD ($)		Sep. 30, 2015 USD ($)	[1]	Jun. 30, 2015 USD ($)	[1]	Mar. 31, 2015 USD ($)	[1]	Dec. 31, 2014 USD ($)		Sep. 30, 2014 USD ($)	[1]	Jun. 30, 2014 USD ($)	[1]	Mar. 31, 2014 USD ($)	[1]	Dec. 31, 2015 USD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Income Taxes [Line Items]
Provision for income taxes, net	$ 453	[1]	$ 161		$ 266		$ 71		$ 205	[1]	$ (205)		$ 94		$ 73		$ 950		$ 167	$ 161
Cash taxes paid, net of refunds																	273		177	169
Undistributed earnings of foreign subsidiaries that are indefinitely invested outside of the U.S	1,500																1,500
Tax credit carryforwards for income tax purposes	725																$ 725
Tax credit carryforwards for income tax purposes, beginning expiration year																	Dec. 31, 2017	Dec. 31, 2017
Accrrued interest and penalties, net of federal income tax benefit, related to tax contingencies	59								$ 41								$ 59		41
Interest and penalties, net of federal income tax benefit																	18		$ 8	$ 8
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Net operating loss carryforwards	1,100																$ 1,100
Operating loss carryforwards, beginning expiration year																	Dec. 31, 2020	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.	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
Foreign Country
Income Taxes [Line Items]
Net operating loss carryforwards	3,400																$ 3,400
Operating loss carryforwards, beginning expiration year																	Dec. 31, 2016	Dec. 31, 2016
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.	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	2003
State
Income Taxes [Line Items]
Net operating loss carryforwards	$ 2,000																$ 2,000
Operating loss carryforwards, beginning expiration year																	Dec. 31, 2016	Dec. 31, 2016
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 and thereafter.	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 and thereafter.
Tax examination, estimate of additional tax expense | €																		€ 196
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.	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.