Goodwill and Other Identifiable Intangible Assets (Identifiable Intangible Assets with Finite Lives) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Acquired Finite-Lived Intangible Assets [Line Items]
Indefinite-Lived Trademarks	$ 1,218		$ 1,158
Gross Carrying Amount	3,560		3,418
Accumulated Amortization	(1,428)		(1,373)
Net	2,132		2,045
Amortization of intangible assets	36	$ 31
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	89
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	115
Finite-Lived Intangible Assets, Amortization Expense, Year Two	105
Finite-Lived Intangible Assets, Amortization Expense, Year Three	100
Finite-Lived Intangible Assets, Amortization Expense, Year Four	100
Finite-Lived Intangible Assets, Amortization Expense, Year Five	90
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	315
Acquired technology [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	638		613
Accumulated Amortization	(500)		(489)
Net	138		124
Customer-related intangibles [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,484		1,437
Accumulated Amortization	(798)		(762)
Net	686		675
Tradenames [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	173		166
Accumulated Amortization	(94)		(87)
Net	79		79
Other [Member]
Acquired Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	47		44
Accumulated Amortization	(36)		(35)
Net	$ 11		$ 9