Goodwill And Acquired Intangibles (Schedule of Finite-Lived Intangible Assets, Future Amortization Expense) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
2014 estimated amortization expense	$ 219
2015 estimated amortization expense	214
2016 estimated amortization expense	199
2017 estimated amortization expense	193
2018 estimated amortization expense	$ 186