Valuation and Qualifying Accounts (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Movement in Valuation Allowances and Reserves [Roll Forward]
Deductions from reserves	$ 38		$ 92		$ 25
Notes and accounts receivable written off	28		62		18
Reclassification of reserve for cash discounts and returns to accounts receivable	0		21		0
Credits to profit and loss	7		1		3
Sale of trade accounts receivable	1		3		0
Miscellaneous other	2		5		4
For Doubtful Receivables [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	121		121		128
Valuation Allowances and Reserves, Charged to Cost and Expense	65		81		16
Valuation Allowances and Reserves, Charged to Other Accounts	0		11	[1]	2	[1]
Deductions from reserves	38	[2]	92	[2]	25	[2]
Balance at end of year	148		121		121
Other Investments and Noncurrent Receivables [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	467		458		518
Valuation Allowances and Reserves, Charged to Cost and Expense	39		25		88
Valuation Allowances and Reserves, Charged to Other Accounts	0		0		0
Deductions from reserves	52		16		148
Balance at end of year	454		467		458
Valuation Allowance of Deferred Tax Assets [Member]
Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	1,399		1,152		682
Valuation Allowances and Reserves, Charged to Cost and Expense	214		335		477
Valuation Allowances and Reserves, Charged to Other Accounts	0		0		0
Deductions from reserves	501		88		7
Balance at end of year	$ 1,112		$ 1,399		$ 1,152

[1] Additions to reserves for doubtful receivables charged to other accounts were classified as "Accounts and notes receivable - Other" in the consolidated balance sheets. These reserves relate to the Company's sale of trade accounts receivable. Anticipated credit losses in the portfolio of receivables sold are used to fair value the Company's interests held in trade accounts receivable conduits. See Notes 11 and 15 to the Consolidated Financial Statements for further information.

[2] (2) 2013 2012 2011 Deductions represent: Notes and accounts receivable written off $28 $62 $18 Reclassification of reserve for cash discounts and returns to accounts receivable — 21 — Credits to profit and loss 7 1 3 Sale of trade accounts receivable (see Note 15 to the Consolidated Financial Statements) 1 3 — Miscellaneous other 2 5 4 $38 $92 $25