Intangible Assets (Intangible Assets Subject to Amortization) (Details) (USD $) In Millions, unless otherwise specified													12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012 Customer Relationships [Member]	Dec. 31, 2011 Customer Relationships [Member]	Dec. 31, 2012 Trademarks [Member]	Dec. 31, 2011 Trademarks [Member]	Dec. 31, 2012 Reacquired Rights [Member]	Dec. 31, 2011 Reacquired Rights [Member]	Dec. 31, 2012 Other Finite Lived Intangible Assets [Member]	Dec. 31, 2011 Other Finite Lived Intangible Assets [Member]	Dec. 31, 2012 Finite Lived Intangible Assets Excluding Customer Relationships [Member]	Dec. 31, 2011 Finite Lived Intangible Assets Excluding Customer Relationships [Member]	Dec. 31, 2012 Minimum [Member] Trademarks [Member]	Dec. 31, 2012 Minimum [Member] Reacquired Rights [Member]	Dec. 31, 2012 Minimum [Member] Other Finite Lived Intangible Assets [Member]	Dec. 31, 2012 Maximum [Member] Customer Relationships [Member]	Dec. 31, 2012 Maximum [Member] Trademarks [Member]	Dec. 31, 2012 Maximum [Member] Reacquired Rights [Member]	Dec. 31, 2012 Maximum [Member] Other Finite Lived Intangible Assets [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life													10 years	9 years	9 years	4 years	37 years	14 years	10 years
Gross Carrying Value	$ 3,111	$ 3,207	$ 234	$ 341	$ 1,168	$ 1,169	$ 1,571	$ 1,571	$ 138	$ 126	$ 2,877	$ 2,866
Accumulated Amortization	(1,776)	(1,591)	(230)	(297)	(681)	(585)	(785)	(652)	(80)	(57)	(1,546)	(1,294)
Net Carrying Value	$ 1,335	$ 1,616	$ 4	$ 44	$ 487	$ 584	$ 786	$ 919	$ 58	$ 69	$ 1,331	$ 1,572