Additional Information (Schedule Of Rental Commitments And Sublease Income Under Non-Cancelable Operating Leases) (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012
Rental Commitments [Member]
Operating Leased Assets [Line Items]
2012	$ 55
2013	50
2014	41
2015	32
2016	26
Thereafter	114
Total	318
Sublease Income [Member]
Operating Leased Assets [Line Items]
2012	3
2013	3
2014	5
2015	5
2016	4
Thereafter	28
Total	$ 48