Other Income (Expense), Net - Additional Information (Details) In Millions, unless otherwise specified	3 Months Ended				9 Months Ended	3 Months Ended									3 Months Ended		6 Months Ended
	Sep. 30, 2014 USD ($)	Mar. 31, 2014 USD ($)	Sep. 30, 2013 USD ($)	Mar. 31, 2013 USD ($)	Dec. 31, 2013 USD ($)	Sep. 30, 2014 Other Income, Net Error [Member] USD ($)	Sep. 30, 2014 Official Exchange [Member] USD ($)	Jun. 30, 2014 Official Exchange [Member] USD ($)	Sep. 30, 2013 Official Exchange [Member] USD ($)	Jun. 30, 2012 Official Exchange [Member] USD ($)	Feb. 28, 2013 Official Exchange [Member] VEF	Jan. 31, 2013 Official Exchange [Member] VEF	Sep. 30, 2014 SICAD [Member] VEF	Mar. 31, 2014 SICAD [Member] VEF	Sep. 30, 2014 SICAD2 [Member] USD ($)	Jun. 30, 2014 SICAD2 [Member] USD ($)	Sep. 30, 2014 SICAD2 [Member] VEF
Interest Income, Gross Receipts Tax			$ 3
Foreign Currency Exchange Rate, Remeasurement											6.3	4.3	12.0	10.7
Amount recognized in the income statement due to the devaluation of the Venezuelan bolivar	(3)	(17)		(6)	5
Foreign Currency Transaction Gain (Loss), Realized							1	7	1	3					8	6
Average Transacted Exchange Rate																	49.9
Quantifying Misstatement in Current Year Financial Statements, Amount						$ (6)