Commitments And Contingent Liabilities (Future Minimum Commitments Under Existing Non-Cancelable Operating Leases And Purchase Obligations) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013
Commitments and Contingencies Disclosure [Abstract]
Lease obligations, 2014	$ 171
Lease obligations, 2015	133
Lease obligations, 2016	97
Lease obligations, 2017	74
Lease obligations, 2018	59
Lease obligations, Thereafter	162
Purchase obligations, 2014	3,170
Purchase obligations, 2015	770
Purchase obligations, 2016	642
Purchase obligations, 2017	529
Purchase obligations, 2018	453
Purchase obligations, Thereafter	2,404
Contractual Obligation, Due in Next Twelve Months	3,341
Total, 2015	903
Total, 2016	739
Total, 2017	603
Total, 2018	512
Total, Thereafter	2,566
Fiber supply agreements	$ 3,300