Asset Impairment, Exit, and Restructuring Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit, and restructuring costs	$ 0	$ 23	$ 31	$ 23
Asset Impairment Charges		12		12
Other than Temporary Impairment Losses, Investments, Available-for-sale Securities		11		11
Relocation costs [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit, and restructuring costs			16
Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Asset impairment, exit, and restructuring costs			$ 15