Goodwill And Other Intangibles (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Amortization expense	$ 643	$ 337	$ 304
Estimated future amortization expense, year 1	663
Estimated future amortization expense, year 2	552
Estimated future amortization expense, year 3	439
Estimated future amortization expense, year 4	342
Estimated future amortization expense, year 5	$ 251
Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	8 years
Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Estimated useful life	12 years
Customer Base [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension	7 years
Royalty Agreements [Member]
Finite-Lived Intangible Assets [Line Items]
Acquired Finite-lived Intangible Asset, Weighted-Average Period before Renewal or Extension	4 years