Pension Benefit Plan Accounting Methodology Changes - Cash Flows (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)	$ 447	$ 481	$ (191)
Deferred income taxes	3	144	(130)
Pension and indemnity plans	(397)	(994)	452
Scenario, Adjusted [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)		481	(191)
Deferred income taxes		144	(130)
Pension and indemnity plans		(994)	452
Scenario, Previously Reported [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)		146	52
Deferred income taxes		(37)	(13)
Pension and indemnity plans		(478)	92
Scenario, Actual [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)	447
Deferred income taxes	3
Pension and indemnity plans	(397)
Previous Accounting Guidance [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Net income (loss)	236
Deferred income taxes	(89)
Pension and indemnity plans	$ (94)