Valuation And Qualifying Accounts (Schedule Of Valuation And Qualifying Accounts) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 141	$ 281	$ 248
Valuation Allowances and Reserves, Charged to Cost and Expense	713	723	729
Additions, Charged to Other Accounts	0	0	0
Valuation Allowances and Reserves, Deductions	761	863	696
Balance at End of Period	93	141	281
Allowance For Returned Goods [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	42	54	46
Valuation Allowances and Reserves, Charged to Cost and Expense	150	114	102
Additions, Charged to Other Accounts	0	0	0
Valuation Allowances and Reserves, Deductions	151	126	94
Balance at End of Period	41	42	54
Allowance For Discounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	0	0	0
Valuation Allowances and Reserves, Charged to Cost and Expense	610	619	602
Additions, Charged to Other Accounts	0	0	0
Valuation Allowances and Reserves, Deductions	610	619	602
Balance at End of Period	0	0	0
Allowance For Losses [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	99	227	202
Valuation Allowances and Reserves, Charged to Cost and Expense	(47)	(10)	25
Additions, Charged to Other Accounts	0	0	0
Valuation Allowances and Reserves, Deductions	0	118
Balance at End of Period	$ 52	$ 99	$ 227