Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Income Taxes [Line Items]
Tax benefit included in discontinued operations				$ 1
Tax benefit (charge) realized from exercise of employee stock options		(1)	(1)	6
Unamortized tax-deductible goodwill resulting from intercompany stock sales and reorganizations		35
Unamortized tax-deduction rate on goodwill		30.00%
Percentage of temporary tax differences that reverse within the carryforward period		30.00%
Percentage of temporary tax differences that reverse within tax planning strategies		5.00%
Percentage of deferred tax asset exclusive of reversing temporary differences		65.00%
Discrete income tax charge for valuation allowances	372
Valuation allowance	1,804	1,804	1,400	1,398	1,268
Holiday period, years				10 years
Decrease to the net deferred tax asset and noncash charge to earnings				50
Income tax benefit for operational losses related to certain foreign jurisdictions that are excluded from the estimated annual effective tax rate calculation		5,200
Percentage of the effect of unrecognized tax benefit, if recorded		(1.00%)	6.00%	2.00%
Interest and penalties recognized		2	3	2
Income related to accrued interest and penalties		12	7	2
Amount accrued for payment of interest and penalties	11	11	15
Spanish Consolidated Tax Group [Member]
Income Taxes [Line Items]
Discrete income tax charge for valuation allowances		372
Valuation allowance	237	237
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Valuation allowance	$ 135	$ 135
Foreign tax credits carry forward period		10 years
Minimum [Member] | Spanish Consolidated Tax Group [Member]
Income Taxes [Line Items]
Deferred tax assets expiry period		2014
Minimum [Member] | Foreign Tax Authority [Member]
Income Taxes [Line Items]
Foreign tax credits expiry period		2016
Maximum [Member] | Spanish Consolidated Tax Group [Member]
Income Taxes [Line Items]
Deferred tax assets expiry period		2030
Maximum [Member] | Foreign Tax Authority [Member]
Income Taxes [Line Items]
Foreign tax credits expiry period		2023