Fair Value Information (Fair Value Assets And Liabilities Measured On A Recurring Basis) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Company-owned life insurance ("COLI")	$ 49	$ 45
Available-for-sale securities	17	15
Derivatives, Assets	67	61
Total	133	121
Derivatives, Liabilities	68	120
Fair Value, Inputs, Level 1 [Member]
Company-owned life insurance ("COLI")	0	0
Available-for-sale securities	17	15
Derivatives, Assets	0	0
Total	17	15
Derivatives, Liabilities	0	0
Fair Value, Inputs, Level 2 [Member]
Company-owned life insurance ("COLI")	49	45
Available-for-sale securities	0	0
Derivatives, Assets	67	61
Total	116	106
Derivatives, Liabilities	68	120
Fair Value, Inputs, Level 3 [Member]
Company-owned life insurance ("COLI")	0	0
Available-for-sale securities	0	0
Derivatives, Assets	0	0
Total	0	0
Derivatives, Liabilities	$ 0	$ 0