Intangible Assets Including Goodwill - Intangible Assets Activity (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Intangible Assets Including Goodwill:
Net carrying amount increase			$ 1,394
Intangible asset amortization expense	$ 403	$ 290	1,148	$ 884
Retirement of fully amortized intangible assets			$ 634