Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Income before income taxes	$ 440,000,000		$ 618,000,000		$ 8,000,000
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
U.S. Federal income tax expense (benefit) at the statutory rate of 35%	154,000,000		216,000,000		3,000,000
Adjustments for foreign income taxed at different rates	(6,000,000)		(28,000,000)		4,000,000
U.S. loss with no tax benefit	(49,000,000)		41,000,000		178,000,000
Net foreign operating losses with no tax due to valuation allowances	83,000,000		5,000,000		18,000,000
Net (release) establishment of valuation allowances	4,000,000		(59,000,000)		(1,000,000)
(Resolution) establishment of uncertain tax positions	10,000,000		24,000,000		(15,000,000)
Deferred tax impact of enacted tax rate and law changes	2,000,000		0		(16,000,000)
Other	5,000,000		2,000,000		1,000,000
United States and Foreign Taxes	203,000,000		201,000,000		172,000,000
Income Tax Expense (Benefit) [Abstract]
Current Federal	0		0		(15,000,000)
Current Foreign	184,000,000		253,000,000		180,000,000
Current State	3,000,000		3,000,000		1,000,000
Current Income Tax Expense (Benefit)	187,000,000		256,000,000		166,000,000
Deferred Federal	2,000,000		2,000,000		(7,000,000)
Deferred Foreign	13,000,000		(56,000,000)		12,000,000
Deferred State	1,000,000		(1,000,000)		1,000,000
Deferred Income Tax Expense (Benefit)	16,000,000		(55,000,000)		6,000,000
Postretirement benefits and pensions	1,331,000,000		1,237,000,000
Tax loss carryforwards and credits	1,238,000,000		949,000,000
Capitalized expenditures	456,000,000		544,000,000
Accrued expenses deductible as paid	613,000,000		595,000,000
Alternative minimum tax credit carryforwards	98,000,000	[1]	99,000,000	[1]
Vacation and sick pay	39,000,000		41,000,000
Rationalizations and other provisions	73,000,000		54,000,000
Other	41,000,000		46,000,000
Total gross deferred tax assets	3,889,000,000		3,565,000,000
Valuation allowance	(3,393,000,000)		(3,132,000,000)
Total deferred tax assets	496,000,000		433,000,000
Property basis differences	(384,000,000)		(350,000,000)
Total net deferred tax liabilities	112,000,000		83,000,000
Income Taxes (Textuals) [Abstract]
Income Tax Reconciliation, Other Adjustments	19,000,000		(36,000,000)		(33,000,000)
Income Tax Reconciliation, Tax Settlements, Foreign	10,000,000		24,000,000		(20,000,000)
Income Tax Reconciliation, Nondeductible Expense, Other	9,000,000
Net (release) establishment of valuation allowances	(4,000,000)		59,000,000		1,000,000
Income Tax Effects Allocated Directly to Equity, Other					(9,000,000)
Deferred tax impact of enacted tax rate and law changes	2,000,000		0		(16,000,000)
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	461,000,000
Deferred Tax Assets, Operating Loss Carryforwards, Domestic	654,000,000
Deferred Tax Assets, Operating Loss Carryforwards, State and Local	123,000,000
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration	50,000,000
Deferred Tax Assets, Tax Credit Carryforwards, Foreign	614,000,000
Deferred Tax Assets, Tax Credit Carryforwards, Research	31,000,000
Deferred Tax Assets Unrealized Stock Options	41,000,000
Unrecognized tax benefits	82,000,000		90,000,000		87,000,000
Tax expense, that would have a favorable impact of Unrecognized tax benefits	70,000,000
Accrued Interest	20,000,000
Unrecognized Tax Benefit That Require Use Of Cash	24,000,000
Undistributed Foreign Earnings	3,700,000,000
Income Taxes Paid, Net	204,000,000		212,000,000		167,000,000
future income tax benefit from enacted law change	7,000,000
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning Balance, Unrecognized tax benefits	90,000,000		87,000,000		112,000,000
Increases related to prior year tax positions	12,000,000		17,000,000		32,000,000
Decreases related to prior year tax positions	(7,000,000)		0		(3,000,000)
Increases related to current year tax positions	0		3,000,000		0
Settlements	(6,000,000)		(9,000,000)		(51,000,000)
Lapse of statute of limitations	(3,000,000)		(1,000,000)		(4,000,000)
Unrecognized Tax Benefits, Decreases Resulting from Foreign Currency Translation	(4,000,000)		(7,000,000)
Unrecognized Tax Benefits, Increases Resulting from Foreign Currency Translation					1,000,000
Ending Balance, Unrecognized tax benefits	82,000,000		90,000,000		87,000,000
UNITED STATES
Income before income taxes	146,000,000		(111,000,000)		(529,000,000)
Foreign Tax Authority [Member]
Income before income taxes	294,000,000		729,000,000		537,000,000
Resolution Between United States And Canada [Member]
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Decreases related to prior year tax positions					(48,000,000)
Canada [Member]
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Net (release) establishment of valuation allowances			(64,000,000)
Income Taxes (Textuals) [Abstract]
Net (release) establishment of valuation allowances			64,000,000
International [Member]
Income Tax Expense (Benefit) [Abstract]
Valuation allowance	$ (574,000,000)

[1] Primarily unlimited carryforward period.