Components of Other Operating Expenses (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Construction Expense	$ 17		$ 22
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	0		6
Other Operating Income (Expense), Net	(1)		(1)
Other Cost and Expense, Operating	18		17
Pension Plans, Defined Benefit [Member]
Defined Benefit Plan, Recognized Net Gain (Loss) Due to Settlements	$ 0	[1]	$ 6	[1]

[1] During the first quarter of 2013, we recorded a gain related to the final settlement of our defined benefit pension plan. For additional information, refer to Note 16. Employee Benefit Plans of the Notes to Consolidated Financial Statements in our Form 10-K.