Goodwill And Acquired Intangibles (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Goodwill and Intangible Assets Disclosure [Abstract]
Carrying amount of indefinite-lived intangible assets relating to trade names	$ 497	$ 497
Amortization expense of acquired finite-lived intangible assets	213	203
Estimated amortization expense, next 12 months	191
Estimated amortization expense, year 2	185
Estimated amortization expense, year 3	176
Estimated amortization expense, year 4	160
Estimated amortization expense, year 5	152
Finite-lived Intangible Assets Acquired	277	269
Non-cash investing and financing transactions related to acquired finite-lived intangibles	213	256
Total acquired finite-lived intangible assets remaining unpaid	$ 352	$ 335