Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended																12 Months Ended
	Dec. 31, 2012		Sep. 30, 2012		Jun. 30, 2012		Mar. 31, 2012		Dec. 31, 2011		Sep. 30, 2011		Jun. 30, 2011		Mar. 31, 2011		Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Provision for income taxes	$ 86	[1]	$ 67	[1]	$ 49	[1]	$ 89	[1]	$ 194	[1]	$ 83	[1]	$ 109	[1]	$ 43	[1]	$ 428	$ 291	$ 352
Cash taxes paid, net of refunds																	112	33	75
Federal statutory rate																	35.00%	35.00%	35.00%
Tax credit carryforwards for income tax purposes	158																158
Tax credit carryforwards for income tax purposes, expiration date																	Begin to expire in 2020
Tax credit carryforwards for income tax purposes, beginning expiration date																	2020
Accrued interest and penalties, net of federal income tax benefit, related to tax contingencies	25								24								25	24
Interest and penalties, net of federal income tax benefit																	1	3	4
Tax examination, additional tax expense including interest and penalties	1,500																1,500
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 or thereafter.
Internal Revenue Service (IRS)
Income Taxes [Line Items]
Net operating Loss Carryforwards	89																89
Operating loss carryforwards, expiration date																	Begin to expire in 2026
Operating loss carryforwards, beginning expiration date																	2026
Foreign Country
Income Taxes [Line Items]
Net operating Loss Carryforwards	1,100																1,100
State of Arizona
Income Taxes [Line Items]
Net operating Loss Carryforwards	606																606
Operating loss carryforwards, expiration date																	Begin to expire in 2013
Operating loss carryforwards, beginning expiration date																	2013
FRANCE
Income Taxes [Line Items]
Tax examination, additional tax expense including interest and penalties	$ 250																$ 250
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.

[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.