Schedule II - Valuation And Qualifying Accounts And Reserves (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Allowance For Obsolescence Of Inventories [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	$ 546	$ 575	$ 530
Changes charged to statement of operations accounts	24	20	34
Payments	0	0	0
Write-offs (net of recoveries)	(23)	(49)	0
Sales, retirements and transfers	0	0	11
Balance at end of year	547	546	575
Allowance For Uncollectible Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	44	52	58
Changes charged to statement of operations accounts	3	3	4
Payments	0	0	0
Write-offs (net of recoveries)	(6)	(11)	(10)
Sales, retirements and transfers	0	0	0
Balance at end of year	41	44	52
Reserves For Environmental Remediation Costs [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	13	14	17
Changes charged to statement of operations accounts	2	(1)	(2)
Payments	(1)	0	(1)
Write-offs (net of recoveries)	(3)	0	0
Sales, retirements and transfers	0	0	0
Balance at end of year	11	13	14
AA [Member] | Allowance For Obsolescence Of Inventories [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	503	530	479
Changes charged to statement of operations accounts	20	18	31
Payments	0	0	0
Write-offs (net of recoveries)	(21)	(45)	0
Sales, retirements and transfers	0	0	20
Balance at end of year	502	503	530
AA [Member] | Allowance For Uncollectible Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	43	51	57
Changes charged to statement of operations accounts	2	3	4
Payments	0	0	0
Write-offs (net of recoveries)	(5)	(11)	(10)
Sales, retirements and transfers	0	0	0
Balance at end of year	40	43	51
AA [Member] | Reserves For Environmental Remediation Costs [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at beginning of year	13	14	17
Changes charged to statement of operations accounts	2	(1)	(2)
Payments	(1)	0	(1)
Write-offs (net of recoveries)	(3)	0	0
Sales, retirements and transfers	0	0	0
Balance at end of year	$ 11	$ 13	$ 14