Goodwill and Other Intangible Assets and Liablities Goodwill Impairment and Carrying Value (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill [Line Items]
Goodwill, Impairment Loss	$ 0	$ 0	$ 0
Goodwill, Impaired, Accumulated Impairment Loss	0	0
Goodwill [Roll Forward]
Beginning Balance	14,845	14,819
Additions	0	26
Ending Balance	$ 14,845	$ 14,845	$ 14,819