Organizational Efficiency Plan (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Dec. 31, 2013	Sep. 30, 2015
Organizational Efficiency Plan Activity [Line Items]
Caption that includes restructuring charges		Other operating expenses
Organizational Efficiency Cost Reduction 2013 Plan [Member]
Organizational Efficiency Plan Activity [Line Items]
Charge	$ 60
Liability For Cost Reduction Initiative		$ 10
Restructuring charge, net of tax	$ 40