Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014 BusinessTaxProvision	Sep. 30, 2013	Dec. 31, 2012	Dec. 31, 2013
Income Tax Contingency [Line Items]
Effective tax rate	60.30%	41.30%	76.00%	63.70%
U.S federal statutory rate	35.00%	35.00%	35.00%	35.00%
Discrete income tax charge			$ 56,000,000
Operational losses in certain foreign jurisdictions	8,000,000	6,000,000	44,000,000
Income tax benefit recognized	199,000,000	31,000,000	200,000,000	116,000,000
Discrete income tax benefit	9,000,000
Nondeductible charges				103,000,000
Number of specific temporary business tax provisions expired during the period			2
Tax provision due to two specific temporary business tax provision that expired in 2011					19,000,000
Foreign tax credits carry forward period			10 years
Noncontrolling interest	2,739,000,000		2,739,000,000			2,929,000,000
Maximum [Member]
Income Tax Contingency [Line Items]
Percentage of tax rate decreased			34.00%
Minimum [Member]
Income Tax Contingency [Line Items]
Percentage of tax rate decreased			15.00%
Brazil [Member]
Income Tax Contingency [Line Items]
Discrete income tax charge	56,000,000
Italy [Member]
Income Tax Contingency [Line Items]
Income tax benefit recognized	0			0
Foreign Jurisdictions [Member]
Income Tax Contingency [Line Items]
Income tax benefit recognized	0	0	0
Spain and Australia Authority [Member]
Income Tax Contingency [Line Items]
Discrete income tax charge				10,000,000
U.S. [Member]
Income Tax Contingency [Line Items]
Discrete income tax benefit				19,000,000
Foreign Tax Authority [Member]
Income Tax Contingency [Line Items]
Decrease to the net deferred tax asset and noncash charge to earnings			56,000,000
Noncontrolling interest	$ 34,000,000		$ 34,000,000