Asset Impairment, Exit, and Restructuring Costs (Asset Impairment Charges And Exit Costs) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Restructuring, Settlement and Impairment Provisions [Abstract]
Relocation and restructuring costs	$ 21,000,000	$ 71,000,000	$ 64,000,000
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net	6,000,000	0	6,000,000
Goodwill and Intangible Asset Impairment	11,000,000	21,000,000	0
Other Asset Impairment Charges	17,000,000	108,000,000	35,000,000
Restructuring, Settlement and Impairment Provisions	$ 55,000,000	$ 200,000,000	$ 105,000,000