United States Steel (X) 10-Q 29 Apr 15 2015 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2015	Apr. 23, 2015
Document and Entity Information [Abstract]
Document Type	10-Q
Amendment Flag	FALSE
Document Period End Date	31-Mar-15
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q1
Trading Symbol	X
Entity Registrant Name	UNITED STATES STEEL CORP
Entity Central Index Key	1163302
Current Fiscal Year End Date	-19
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding		145,679,235

Consolidated_Statement_Of_Oper

Consolidated Statement Of Operations (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Net sales:
Net sales	$2,946	$4,169
Net sales to related parties (Note 17)	326	279
Total	3,272	4,448
Operating expenses (income):
Cost of sales (excludes items shown below)	3,066	4,038
Selling, general and administrative expenses	102	138
Depreciation, depletion and amortization	144	166
(Earnings) loss from investees	-6	4
Restructuring and other charges (Note 18)	153	0
Net gain on disposal of assets (Note 19)	0	-20
Total	3,459	4,326
(Loss) earnings before interest and income taxes (EBIT)	-187	122
Interest expense	51	61
Interest income	0	-1
Other financial costs	11	9
Net interest and other financial costs (Note 6)	62	69
(Loss) earnings before income taxes	-249	53
Income tax (benefit) provision (Note 8)	-174	1
Net (loss) earnings	-75	52
Less: Net earnings attributable to noncontrolling interests	0	0
Net loss	($75)	$52
Earnings (loss) per share attributable to United States Steel Corporation stockholders:
Basic (in dollars per share)	($0.52)	$0.36
Diluted (in dollars per share)	($0.52)	$0.34

Consolidated_Statement_Of_Comp

Consolidated Statement Of Comprehensive Income (Loss) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Condensed Statement of Income Captions [Line Items]
Net (loss) earnings	($75)	$52
Other comprehensive (loss) income, net of tax:
Changes in foreign currency translation adjustments	-103	-2
Changes in pension and other employee benefit accounts	43	50
Total other comprehensive (loss) income, net of tax	-60	48
Comprehensive (loss) income including noncontrolling interest	-135	100
Comprehensive income attributable to noncontrolling interest	0	0
Comprehensive (loss) income attributable to United States Steel Corporation	($135)	$100

Consolidated_Balance_Sheet

Consolidated Balance Sheet (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Current assets:
Cash and cash equivalents	$1,266	$1,354
Receivables, less allowance of $37 and $45	1,423	1,632
Receivables from related parties, less allowance of $209 and $218 (Note 17)	225	310
Inventories (Note 10)	2,418	2,496
Deferred income tax benefits (Note 8)	362	602
Other current assets	48	37
Total current assets	5,742	6,431
Property, plant and equipment	14,545	15,139
Less accumulated depreciation and depletion	10,191	10,565
Total property, plant and equipment, net	4,354	4,574
Investments and long-term receivables, less allowance of $8 in both periods	578	577
Long-term receivables from related parties, less allowance of $1,130 and $1,188	336	362
Intangibles – net (Note 4)	202	204
Deferred income tax benefits (Note 8)	216	46
Other noncurrent assets	116	120
Total assets	11,544	12,314
Current liabilities:
Accounts payable and other accrued liabilities	1,702	1,870
Accounts payable to related parties (Note 17)	135	131
Bank checks outstanding	32	1
Payroll and benefits payable	856	1,003
Accrued taxes	133	134
Accrued interest	73	52
Short-term debt and current maturities of long-term debt (Note 12)	378	378
Total current liabilities	3,309	3,569
Long-term debt, less unamortized discount (Note 12)	3,124	3,120
Employee benefits	1,033	1,117
Deferred income tax liabilities (Note 8)	7	301
Deferred credits and other noncurrent liabilities	403	407
Total liabilities	7,876	8,514
Contingencies and commitments (Note 19)
Stockholders’ Equity (Note 15):
Common stock (150,925,911 shares issued) (Note 9)	151	151
Treasury stock, at cost (5,255,341 and 5,270,872 shares)	-395	-396
Additional paid-in capital	3,633	3,623
Retained earnings	1,779	1,862
Accumulated other comprehensive loss (Note 16)	-1,501	-1,441
Total stockholders’ equity	3,667	3,799
Noncontrolling interests	1	1
Total liabilities and stockholders’ equity	$11,544	$12,314

Consolidated_Balance_Sheet_Par

Consolidated Balance Sheet (Parenthetical) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, except Share data, unless otherwise specified
Receivables, allowance	$37	$45
Investments and long-term receivables, allowance	8	8
Common stock, shares issued	150,925,911	150,925,911
Treasury stock, shares	5,255,341	5,270,872
Affiliated Entity [Member]
Receivables, allowance	209	218
Investments and long-term receivables, allowance	$0	$0

Consolidated_Statement_Of_Cash

Consolidated Statement Of Cash Flows (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Operating activities:
Net (loss) earnings	($75)	$52
Adjustments to reconcile to net cash provided by operating activities:
Depreciation, depletion and amortization	144	166
Restructuring and other charges (Note 18)	153	0
Provision for doubtful accounts	6	-2
Pensions and other postretirement benefits	-17	-16
Deferred income taxes	-166	4
Net gain on disposal of assets (Note 19)	0	-20
Distributions received, net of equity investees earnings	-4	4
Changes in:
Current receivables	237	-232
Inventories	33	260
Current accounts payable and accrued expenses	-192	335
Income taxes receivable/payable	16	2
Bank checks outstanding	31	26
All other, net	-18	-13
Net cash provided by operating activities	136	570
Investing activities:
Capital expenditures	-172	-90
Disposal of assets	0	19
Change in restricted cash, net	2	6
Investments, net	-1	-1
Net cash used in investing activities	-171	-66
Financing activities:
Dividends paid	-7	-7
Net cash used in financing activities	-7	-7
Effect of exchange rate changes on cash	-46	-2
Net increase in cash and cash equivalents	-88	495
Cash and cash equivalents at beginning of year	1,354	604
Cash and cash equivalents at end of period	$1,266	$1,099

Consolidated_Statement_Of_Cash1

Consolidated Statement Of Cash Flows (Parenthetical) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Statement of Cash Flows [Abstract]
Financing costs	$0	$15

Basis_of_Presentation_and_Sign

Basis of Presentation and Significant Accounting Policies (Notes)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
Basis of Presentation and Significant Accounting Policies	Basis of Presentation and Significant Accounting Policies
	United States Steel Corporation (U. S. Steel or the Company) produces and sells steel products, including flat-rolled and tubular products, in North America and Central Europe. Operations in North America also include iron ore and coke production facilities, railroad services and real estate operations. Operations in Europe also include coke production facilities.
	The consolidated results for the three months ended March 31, 2015 do not reflect the results of U. S. Steel Canada Inc. (USSC) due to USSC’s filing for creditor protection pursuant to Canada’s Companies’ Creditors Arrangement Act (CCAA) on September 16, 2014. The consolidated statement of operations, consolidated statement of comprehensive income (loss) and consolidated statement of cash flows for the three months ended March 31, 2014 include the results for USSC.
	The year-end consolidated balance sheet data was derived from audited statements but does not include all disclosures required for complete financial statements by accounting principles generally accepted in the United States of America (U.S. GAAP). The other information in these financial statements is unaudited but, in the opinion of management, reflects all adjustments necessary for a fair statement of the results for the periods covered. All such adjustments are of a normal recurring nature unless disclosed otherwise. These financial statements, including notes, have been prepared in accordance with the applicable rules of the Securities and Exchange Commission and do not include all of the information and disclosures required by U.S. GAAP for complete financial statements. Additional information is contained in the United States Steel Corporation Annual Report on Form 10-K for the fiscal year ended December 31, 2014, which should be read in conjunction with these financial statements.

New_Accounting_Standards_Notes

New Accounting Standards (Notes)	3 Months Ended
	Mar. 31, 2015
Accounting Policies [Abstract]
New Accounting Standards	New Accounting Standards
	On April 7, 2015, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update No. 2015-03, Simplifying the Presentation of Debt Issuance Costs (ASU 2015-03). ASU 2015-03 changes the presentation of debt issuance costs in financial statements and requires an entity to present such costs in the balance sheet as a direct deduction from the related debt liability rather than as an asset. Amortization of the costs is reported as interest expense. ASU 2015-03 is effective for public entities for financial statements issued for fiscal years beginning after December 15, 2015, and interim periods within those fiscal years; early application is permitted. An entity is required to apply the new guidance on a retrospective basis, wherein the balance sheet of each individual period presented should be adjusted to reflect the period-specific effects of applying the new guidance. U. S. Steel is evaluating the financial statement implications of adopting ASU 2015-03.
	On August 27, 2014, the FASB issued Accounting Standards Update No. 2014-15, Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (ASU 2014-15). ASU 2014-15 explicitly requires management to assess an entity’s ability to continue as a going concern, and to provide related footnote disclosures in certain circumstances. Currently, there is no guidance in U.S. GAAP about management's responsibility to evaluate whether there is substantial doubt about an entity's ability to continue as a going concern or to provide related footnote disclosures. ASU 2014-15 is effective for all entities for interim and annual periods beginning after December 15, 2016; early application is permitted. U. S. Steel does not expect any financial statement impact relating to the adoption of this ASU.
	On May 28, 2014, the FASB and the International Accounting Standards Board issued Accounting Standards Update No. 2014-09, Revenue from Contracts with Customers (ASU 2014-09). ASU 2014-09 outlines a single comprehensive model for entities to use in accounting for revenue arising from contracts with customers and supersedes most current revenue recognition guidance, including industry-specific guidance. ASU 2014-09 is effective for interim and annual periods beginning after December 15, 2016; early application is not permitted. On April 1, 2015, the FASB voted to propose a one year deferral of the effective date of ASU 2014-09, but to permit entities to adopt the standard on the original effective date if they choose. U. S. Steel is evaluating the financial statement implications of adopting ASU 2014-09.

Segment_Information_Notes

Segment Information (Notes)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Segment Information	Segment Information
	U. S. Steel has three reportable segments: Flat-Rolled Products (Flat-Rolled), U. S. Steel Europe (USSE), and Tubular Products (Tubular). The results of our railroad and real estate businesses that do not constitute reportable segments are combined and disclosed in the Other Businesses category.
	The Flat-Rolled segment information subsequent to September 16, 2014 does not include USSC. Transactions between U. S. Steel and USSC subsequent to USSC applying for relief from its creditors pursuant to CCAA (CCAA filing) are considered related party transactions.
	Effective January 1, 2015, the Flat-Rolled segment has been realigned to better serve customer needs through the creation of commercial entities to specifically address customers in the automotive, consumer, industrial, service center and mining market sectors. This realignment did not affect the Company's reportable segments.
	The chief operating decision maker evaluates performance and determines resource allocations based on a number of factors, the primary measure being earnings (loss) before interest and income taxes (EBIT). EBIT for reportable segments and Other Businesses does not include net interest and other financial costs (income), income taxes, postretirement benefit expenses (other than service cost and amortization of prior service cost for active employees) and certain other items that management believes are not indicative of future results. Information on segment assets is not disclosed, as it is not reviewed by the chief operating decision maker.
	The accounting principles applied at the operating segment level in determining EBIT are generally the same as those applied at the consolidated financial statement level. The transfer value for steel rounds from Flat-Rolled to Tubular is based on cost. All other intersegment sales and transfers are accounted for at market-based prices and are eliminated at the corporate consolidation level. Corporate-level selling, general and administrative expenses and costs related to certain former businesses are allocated to the reportable segments and Other Businesses based on measures of activity that management believes are reasonable.
	The results of segment operations for the three months ended March 31, 2015 and 2014 are:
	(In millions) First Quarter 2015	Customer			Intersegment			Net			Earnings			EBIT
		Sales			Sales			Sales			(loss)
											from
											investees
	Flat-Rolled	$	2,194		$	103		$	2,297		$	5		$	(67	)
	USSE	691			1			692			—			37
	Tubular	371			—			371			3			1
	Total reportable segments	3,256			104			3,360			8			(29		)
	Other Businesses	16			28			44			(2		)	8
	Reconciling Items and Eliminations	—			(132		)	(132		)	—			(166		)
	Total	$	3,272		$	—		$	3,272		$	6		$	(187	)
	First Quarter 2014
	Flat-Rolled	$	3,027		$	303		$	3,330		$	(6	)	$	85
	USSE	759			1			760			—			32
	Tubular	643			1			644			2			24
	Total reportable segments	4,429			305			4,734			(4		)	141
	Other Businesses	19			34			53			—			13
	Reconciling Items and Eliminations	—			(339		)	(339		)	—			(32		)
	Total	$	4,448		$	—		$	4,448		$	(4	)	$	122
	The following is a schedule of reconciling items to EBIT:
		Three Months Ended March 31,
	(In millions)	2015			2014
	Items not allocated to segments:
	Postretirement benefit expense (a)	$	(13	)	$	(32	)
	Other items not allocated to segments:
	Loss on shutdown of coke production facilities (b)	(153		)	—
	Total other items not allocated to segments	(153		)	—
	Total reconciling items	$	(166	)	$	(32	)
	(a) Consists of the net periodic benefit cost elements, other than service cost and amortization of prior service cost for active
	employees, associated with our defined pension, retiree health care and life insurance benefit plans.
	(b) Included in Restructuring and Other Charges on the Consolidated Statements of Operations. See Note 18 to the Consolidated Financial Statements.

Intangible_Assets

Intangible Assets	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	Intangible Assets
	Intangible assets are being amortized on a straight-line basis over their estimated useful lives and are detailed below:
			As of March 31, 2015						As of December 31, 2014
	(In millions)	Useful	Gross		Accumulated		Net		Gross		Accumulated		Net
		Lives	Carrying		Amortization		Amount		Carrying		Amortization		Amount
			Amount						Amount
	Customer relationships	22-23 Years	$	132	$	48	$	84	$	132	$	46	$	86
	Other	2-20 Years	23		13		10		23		13		10
	Total amortizable intangible assets		$	155	$	61	$	94	$	155	$	59	$	96
	The carrying amount of acquired water rights with indefinite lives as of March 31, 2015 and December 31, 2014 totaled $75 million. The water rights are tested for impairment annually in the third quarter. U. S. Steel performed a qualitative impairment evaluation of its water rights for 2014. The 2014 and prior year tests indicated the water rights were not impaired.
	During 2013, U. S. Steel acquired indefinite-lived intangible assets for $12 million and entered into an agreement to make future payments contingent upon certain factors. The aggregate purchase price was $36 million, and U. S. Steel allocated $33 million to indefinite-lived intangible assets, based upon their estimated fair value. The liability for contingent consideration is reassessed each quarter. The maximum potential liability for contingent consideration is $53 million. As of March 31, 2015, U. S. Steel has recorded a liability of $24 million to reflect the estimated fair value of the contingent consideration. Contingent consideration was valued using a probability weighted discounted cash flow using both Level 2 inputs based on 2013 Standard and Poor’s Bond Guide as well as Level 3, significant other unobservable inputs, based on internal forecasts and the weighted average cost of capital derived from market data.
	Identifiable intangible assets with finite lives are reviewed for impairment whenever events or circumstances indicate that the carrying values may not be recoverable.
	Amortization expense was $2 million in both the three months ended March 31, 2015 and March 31, 2014. The estimated future amortization expense of identifiable intangible assets during the next five years is $5 million for the remaining portion of 2015 and $7 million each year from 2016 to 2019.

Pensions_and_Other_Benefits_No

Pensions and Other Benefits (Notes)	3 Months Ended
	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Pensions and Other Benefits	Pensions and Other Benefits
	The following table reflects the components of net periodic benefit cost for the three months ended March 31, 2015 and 2014:
		Pension						Other
		Benefits						Benefits
	(In millions)	2015			2014			2015			2014
	Service cost	$	26		$	27		$	5		$	6
	Interest cost	66			109			24			36
	Expected return on plan assets	(110		)	(153		)	(38		)	(35		)
	Amortization of prior service cost	4			6			(2		)	(3		)
	Amortization of actuarial net loss	64			70			2			(1		)
	Net periodic benefit cost, excluding below	50			59			(9		)	3
	Multiemployer plans	18			18			—			—
	Settlement, termination and curtailment losses	3			7			—			—
	Net periodic benefit cost	$	71		$	84		$	(9	)	$	3
	Employer Contributions
	During the first three months of 2015, U. S. Steel made cash payments of $21 million to the Steelworkers’ Pension Trust and $8 million of pension payments not funded by trusts.
	During the first three months of 2015, cash payments of $43 million were made for other postretirement benefit payments not funded by trusts. In addition, U. S. Steel made a required contribution of $10 million in the first three months of 2015 to our trust for represented retiree health care and life insurance benefits.
	Company contributions to defined contribution plans totaled $10 million and $12 million for the three months ended March 31, 2015 and 2014, respectively.
	Non-retirement postemployment benefits
	U. S. Steel incurred costs of approximately $14 million for the three months ended March 31, 2015 related to the accrual of employee costs for supplemental unemployment benefits and the continuation of health care benefits and life insurance coverage for employees associated with the temporary idling of certain facilities and reduced production at others. Payments during the three months ended March 31, 2015 were insignificant. There were no significant similar costs incurred during the three months ended March 31, 2014.
	Pension Funding
	In November 2013, U. S. Steel's Board of Directors authorized voluntary contributions to U. S. Steel's trusts for pensions and other benefits of up to $300 million through the end of 2015. In August 2014, U. S. Steel made a voluntary contribution of $140 million to our main U.S. defined benefit plan.

Net_Interest_and_Other_Financi

Net Interest and Other Financial Costs (Notes)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Net Interest and Other Financial Costs	Net Interest and Other Financial Costs
	Net interest and other financial costs includes interest expense (net of capitalized interest), interest income, financing costs, derivatives gains and losses and foreign currency remeasurement gains and losses. Foreign currency gains and losses are primarily a result of foreign currency denominated assets and liabilities that require remeasurement and the impacts of euro-U.S. dollar derivatives activity. During the three months ended March 31, 2015 and 2014, there was an insignificant amount of net foreign currency effects recorded in other financial costs.
	See Note 11 for additional information on U. S. Steel’s use of derivatives to mitigate its foreign currency exchange rate exposure.

StockBased_Compensation_Plans_

Stock-Based Compensation Plans (Notes)	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Stock-Based Compensation Plans	Stock-Based Compensation Plans
	U. S. Steel has outstanding stock-based compensation awards that were granted by the Compensation & Organization Committee of the Board of Directors (the Committee) under the 2005 Stock Incentive Plan (the Plan), which is more fully described in Note 13 of the United States Steel Corporation Annual Report on Form 10-K for the fiscal year ended December 31, 2014. An aggregate of 21,250,000 shares of U. S. Steel common stock may be issued under the Plan. As of March 31, 2015, 1,262,031 shares were available for future grants.
	During the first quarter of 2014, the Committee added return on capital employed (ROCE) as a second performance measure for the Performance Awards as permitted under the terms of the Plan. Prior to the addition of the ROCE awards, performance awards were based solely on a total shareholder return (TSR) metric. ROCE awards granted are measured on a weighted average basis of the Company’s consolidated worldwide EBIT, as adjusted, divided by consolidated worldwide capital employed, as adjusted, over a three year period.
	Weighted average ROCE is calculated based on the ROCE achieved in the first, second and third years of the performance period, weighted at 20 percent, 30 percent and 50 percent, respectively. The ROCE awards will payout at approximately 50 percent at the threshold level, 100 percent at the target level and 200 percent at the maximum level. Amounts in between the threshold percentages are interpolated.
	Compensation expense associated with the ROCE awards will be contingent based upon the achievement of the specified ROCE metric as outlined in the Plan and will be adjusted on a quarterly basis to reflect the probability of achieving the ROCE metric.
	Recent grants of stock-based compensation consist of stock options, restricted stock units, and TSR and ROCE performance awards. Stock options are generally issued at the market price of the underlying stock on the date of the grant. Upon exercise of stock options, shares of U. S. Steel common stock are issued from treasury stock. The following table is a general summary of the awards made under the Plan. There were no issuances of stock options or restricted stock units during the first quarter of 2014.
		2015				2014
	Grant Details	Shares(a)		Fair Value(b)		Shares(a)	Fair Value(b)
	Stock Options	1,067,190		$	10.04	—	$	—
	Restricted Stock Units	765,750		$	24.75	—	$	—
	Performance Awards:(c)
	TSR	273,560		$	24.95	279,570	$	21.99
	ROCE (d)	—		$	—	259,280	$	23.71
	(a) The share amounts shown in this table do not reflect an adjustment for estimated forfeitures.
	(b) Represents the per share weighted-average for all grants during the quarter.
	(c) The number of performance awards shown represents the target value of the award.
	(d) In lieu of ROCE equity awards being granted in 2015, the Company granted cash settled ROCE incentives to certain members of executive management.
	U. S. Steel recognized pretax stock-based compensation expense in the amount of $11 million and $9 million in the three month periods ended March 31, 2015 and 2014, respectively.
	As of March 31, 2015, total future compensation expense related to nonvested stock-based compensation arrangements was $62 million, and the weighted average period over which this expense is expected to be recognized is approximately 1.2 years.
	Compensation expense for stock options is recorded over the vesting period based on the fair value on the date of grant, as calculated by U. S. Steel using the Black-Scholes model and the assumptions listed below. The stock options vest ratably over a three-year service period and have a term of ten years.
	Black-Scholes Assumptions		2015 Grants
	Grant date price per share of option award		$	24.78
	Exercise price per share of option award		$	24.78
	Expected annual dividends per share, at grant date		$	0.2
	Expected life in years		5
	Expected volatility		47		%
	Risk-free interest rate		1.6		%
	Grant date fair value per share of unvested option awards as calculated from above		$	10.04
	The expected annual dividends per share are based on the latest annualized dividend rate at the date of grant; the expected life in years is determined primarily from historical stock option exercise data; the expected volatility is based on the historical volatility of U. S. Steel stock; and the risk-free interest rate is based on the U.S. Treasury strip rate for the expected life of the option.
	Restricted stock units generally vest ratably over three years. The fair value of the restricted stock units is the average market price of the underlying common stock on the date of the grant.
	TSR performance awards vest at the end of a three-year performance period as a function of U. S. Steel's total shareholder return compared to the total shareholder return of a group of peer companies over the three-year performance period. TSR performance awards can vest at between zero and 200 percent of the target award. The fair value of the TSR performance awards is calculated using a Monte-Carlo simulation.
	ROCE performance awards vest at the end of a three-year performance period contingent upon meeting the specified ROCE metric. ROCE performance awards can vest at between zero and 200 percent of the target award. The fair value of the ROCE performance awards is the average market price of the underlying common stock on the date of grant.

Income_Taxes_Notes

Income Taxes (Notes)	3 Months Ended
	Mar. 31, 2015
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes
	Tax provision
	For the three months ended March 31, 2015 and 2014, we recorded a tax benefit of $174 million on our pretax loss of $249 million and a tax provision of $1 million on our pretax income of $53 million, respectively. The tax provision reflects a benefit for percentage depletion in excess of cost depletion for iron ore that we produce and consume or sell. Included in the tax provision is a net benefit of $31 million relating to the adjustment of certain tax reserves in the first three months of 2015. The tax provision does not reflect any tax benefit for pretax losses in Canada, prior to the deconsolidation on September 16, 2014, which is a jurisdiction where we had recorded a full valuation allowance on deferred tax assets.
	The tax benefit for the first three months of 2015 is based on an estimated annual effective rate, which requires management to make its best estimate of annual pretax income or loss. During the year, management regularly updates forecasted annual pretax results for the various countries in which we operate based on changes in factors such as prices, shipments, product mix, plant operating performance and cost estimates. To the extent that actual 2015 pretax results for U.S. and foreign income or loss vary from estimates applied herein, the actual tax provision or benefit recognized in 2015 could be materially different from the forecasted amount used to estimate the tax provision for the three months ended March 31, 2015.
	Unrecognized tax benefits
	Unrecognized tax benefits are the differences between a tax position taken, or expected to be taken, in a tax return and the benefit recognized for accounting purposes pursuant to the guidance in Accounting Standards Codification (ASC) Topic 740 on income taxes. The total amount of gross unrecognized tax benefits was $83 million at March 31, 2015 and $112 million at December 31, 2014. The change in unrecognized tax benefits reflects a net decrease primarily due to the conclusion of certain tax examinations. The total amount of net unrecognized tax benefits that, if recognized, would affect the effective tax rate was $24 million as of March 31, 2015 and $59 million as of December 31, 2014.
	U. S. Steel records interest related to uncertain tax positions as a part of net interest and other financial costs in the consolidated statement of operations. Any penalties are recognized as part of selling, general and administrative expenses. As of March 31, 2015 and December 31, 2014, U. S. Steel had accrued liabilities of $2 million and $7 million, respectively, for interest related to uncertain tax positions. U. S. Steel currently does not have a liability for tax penalties.
	Deferred taxes
	As of March 31, 2015, the net domestic deferred tax asset was $557 million compared to $318 million at December 31, 2014. A substantial amount of U. S. Steel’s domestic deferred tax assets relates to employee benefits that will become deductible for tax purposes over an extended period of time as cash contributions are made to employee benefit plans and retiree benefits are paid in the future. We continue to believe it is more likely than not that the net domestic deferred tax asset will be realized.
	As of March 31, 2015, the net foreign deferred tax asset was $14 million, net of an established valuation allowance of $5 million. At December 31, 2014, the net foreign deferred tax asset was $29 million, net of an established valuation allowance of $5 million. The net foreign deferred tax asset will fluctuate as the value of the U.S. dollar changes with respect to the euro.

Notes

(Notes)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Earnings and Dividends Per Common Share	Earnings and Dividends Per Common Share
	Earnings Per Share Attributable to United States Steel Corporation Stockholders
	Basic earnings per common share is based on the weighted average number of common shares outstanding during the period.
	Diluted earnings per common share assumes the exercise of stock options, the vesting of restricted stock units and performance awards and the conversion of convertible notes, provided in each case the effect is dilutive. The “treasury stock” method is used to calculate the dilutive effect of the Senior Convertible Notes due in 2019 (2019 Senior Convertible Notes) due to our current intent and policy, among other factors, to settle the principal amount of the 2019 Senior Convertible Notes in cash upon conversion. The "if-converted" method was used to calculate the dilutive effect of the 2014 Senior Convertible Notes due May 2014 (2014 Senior Convertible Notes).
	The computations for basic and diluted earnings per common share from continuing operations are as follows:
		Three Months Ended March 31,
	(Dollars in millions, except per share amounts)	2015				2014
	Net (loss) earnings attributable to United States Steel Corporation stockholders	$	(75	)		$	52
	Plus earnings effect of assumed conversion-interest on convertible notes	—				2
	Net (loss) earnings after assumed conversion	$	(75	)		$	54
	Weighted-average shares outstanding (in thousands):
	Basic	145,733				144,757
	Effect of convertible notes	—				10,058
	Effect of stock options, restricted stock units and performance awards	—				1,299
	Adjusted weighted-average shares outstanding, diluted	145,733				156,114
	Basic earnings per common share	$	(0.52	)		$	0.36
	Diluted earnings per common share	$	(0.52	)		$	0.34
	The following table summarizes the securities that were antidilutive, and therefore, were not included in the computations of diluted earnings per common share:
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Securities granted under the 2005 Stock Incentive Plan	10,056			2,336
	Dividends Paid Per Share
	The dividend for the first quarter of 2015 and 2014 was five cents per common share.

Inventories_Notes

Inventories (Notes)	3 Months Ended
	Mar. 31, 2015
Inventory Disclosure [Abstract]
Inventories	Inventories
	Inventories are carried at the lower of cost or market. The first-in, first-out method is the predominant method of inventory costing in Europe. The last-in, first-out (LIFO) method is the predominant method of inventory costing in the United States. At March 31, 2015 and December 31, 2014, the LIFO method accounted for 81 percent and 78 percent of total inventory values, respectively.
	(In millions)	March 31, 2015		December 31, 2014
	Raw materials	$	864	$	801
	Semi-finished products	982		1,053
	Finished products	502		563
	Supplies and sundry items	70		79
	Total	$	2,418	$	2,496
	Current acquisition costs were estimated to exceed the above inventory values by $875 million and $1.0 billion at March 31, 2015 and December 31, 2014, respectively. As a result of the liquidation of LIFO inventories, cost of sales increased and EBIT decreased by $4 million and $9 million in the three months ended March 31, 2015 and March 31, 2014, respectively.
	Inventory includes $66 million and $69 million of property held for residential or commercial development as of March 31, 2015 and December 31, 2014, respectively.

Derivative_Instruments_Notes

Derivative Instruments (Notes)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Derivative Instruments	Derivative Instruments
	U. S. Steel is exposed to foreign currency exchange rate risks as a result of our European operations. USSE’s revenues are primarily in euros and costs are primarily in U.S. dollars and euros. In addition, foreign cash requirements have been, and in the future may be, funded by intercompany loans, creating intercompany monetary assets and liabilities in currencies other than the functional currency of the entities involved, which can affect income when remeasured at the end of each period.
	U. S. Steel uses euro forward sales contracts with maturities no longer than 12 months to exchange euros for U.S. dollars to manage our currency requirements and exposure to foreign currency exchange rate fluctuations. Derivative instruments are required to be recognized at fair value in the consolidated balance sheet. U. S. Steel has not elected to designate these euro forward sales contracts as hedges. Therefore, changes in their fair value are recognized immediately in the consolidated results of operations. The gains and losses recognized on the euro forward sales contracts may also partially offset the accounting remeasurement gains and losses recognized on intercompany loans.
	As of March 31, 2015, U. S. Steel held euro forward sales contracts with a total notional value of approximately $316 million. We mitigate the risk of concentration of counterparty credit risk by purchasing our forward sales contracts from several counterparties.
	Additionally, U. S. Steel uses fixed-price forward physical purchase contracts to partially manage our exposure to price risk related to the purchases of natural gas and certain nonferrous metals used in the production process. During 2015 and 2014, the forward physical purchase contracts for natural gas and nonferrous metals qualified for the normal purchases and normal sales exemption described in ASC Topic 815 and were not subject to mark-to-market accounting.
	The following summarizes the location and amounts of the fair values and gains or losses related to derivatives included in U. S. Steel's consolidated financial statements as of March 31, 2015 and December 31, 2014 and for the three months ended March 31, 2015 and 2014:
			Fair Value		Fair Value
	(In millions)	Balance Sheet	31-Mar-15		31-Dec-14
		Location
	Foreign exchange forward contracts	Accounts receivable	$	49	$	31
	Foreign exchange forward contracts	Accounts payable	$	1	$	—
	(In millions)	Statement of	Amount of Gain		Amount of Gain
		Operations
		Location	Three Months Ended March 31, 2015		Three Months Ended March 31, 2014
	Foreign exchange forward contracts	Other financial	$	43	$	—
		costs
	In accordance with the guidance found in ASC Topic 820 on fair value measurements and disclosures, the fair value of our euro forward sales contracts was determined using Level 2 inputs, which are defined as "significant other observable" inputs. The inputs used are from market sources that aggregate data based upon market transactions.

Debt_Notes

Debt (Notes)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Debt	Debt
	(In millions)	Interest		Maturity	March 31, 2015		December 31, 2014
		Rates %
	2037 Senior Notes	6.65		2037	$	350	$	350
	2022 Senior Notes	7.5		2022	400		400
	2021 Senior Notes	6.875		2021	275		275
	2020 Senior Notes	7.375		2020	600		600
	2018 Senior Notes	7		2018	500		500
	2017 Senior Notes	6.05		2017	450		450
	2019 Senior Convertible Notes(a)	2.75		2019	316		316
	Environmental Revenue Bonds	5.38 - 6.88		2015 - 2042	549		549
	Recovery Zone Facility Bonds	6.75		2040	70		70
	Fairfield Caster Lease			2022	33		33
	Other capital leases and all other obligations			2019	1		—
	Amended Credit Agreement	Variable		2016	—		—
	USSK Revolver	Variable		2016	—		—
	USSK credit facilities	Variable		2015 - 2016	—		—
	Total Debt				3,544		3,543
	Less unamortized discount				42		45
	Less short-term debt and long-term debt due within one year(a)				378		378
	Long-term debt				$	3,124	$	3,120
	(a) The 2019 Senior Convertible Notes were reclassified to current as a result of USSC's CCAA filing.
	To the extent not otherwise discussed below, information concerning the Senior Notes, the Senior Convertible Notes and other listed obligations can be found in Note 15 of the audited financial statements in the United States Steel Corporation Annual Report on Form 10-K for the fiscal year ended December 31, 2014.
	Amended Credit Agreement
	As of March 31, 2015, there were no amounts drawn on the $875 million credit facility agreement (Amended Credit Agreement) and inventory values calculated in accordance with the Amended Credit Agreement supported the full $875 million of the facility. Under the Amended Credit Agreement, U. S. Steel must maintain a fixed charge coverage ratio (as further defined in the Amended Credit Agreement) of at least 1.00 to 1.00 for the most recent four consecutive quarters when availability under the Amended Credit Agreement is less than the greater of 10 percent of the total aggregate commitments and $87.5 million. Since availability was greater than $87.5 million, compliance with the fixed charge coverage ratio covenant was not applicable.
	Receivables Purchase Agreement
	As of March 31, 2015, U. S. Steel has a Receivables Purchase Agreement (RPA) under which trade accounts receivable are sold, on a daily basis without recourse, to U. S. Steel Receivables, LLC (USSR), a wholly owned, bankruptcy-remote, special purpose entity. As U. S. Steel accesses this facility, USSR sells senior undivided interests in the receivables to third parties, while maintaining a subordinated undivided interest in a portion of the receivables. U. S. Steel has agreed to continue servicing the sold receivables at market rates.
	At March 31, 2015 and December 31, 2014, eligible accounts receivable supported $502 million and $625 million of availability, respectively, under the RPA and there were no receivables sold to third-parties under this facility. The subordinated retained interest was $502 million and $625 million at March 31, 2015 and December 31, 2014, respectively. Availability under the RPA was $452 million at March 31, 2015 and $576 million at December 31, 2014, due to letters of credit outstanding of $50 million and $49 million, respectively.
	USSR pays the third-parties a discount based on the third-parties’ borrowing costs plus incremental fees. We paid approximately $1 million for each of the three months ended March 31, 2015 and 2014, relating to fees on the RPA. These costs are included in other financial costs in the consolidated statement of operations.
	Generally, the facility provides that as payments are collected from the sold accounts receivables, USSR may elect to have the third-parties reinvest the proceeds in new eligible accounts receivable. As there was no activity under this facility during the three months ended March 31, 2015 and 2014, there were no collections reinvested.
	The eligible accounts receivable and receivables sold to third party conduits are summarized below:
	(In millions)	March 31, 2015			December 31, 2014
	Balance of accounts receivable-net, eligible for sale to third-parties	$	782		$	1,013
	Accounts receivable sold to third-parties	—			—
	Balance included in Receivables on the balance sheet of U. S. Steel	$	782		$	1,013
	The net book value of U. S. Steel’s retained interest in the receivables represents the best estimate of the fair market value due to the short-term nature of the receivables. The retained interest in the receivables is recorded net of the allowance for bad debts, which historically have not been significant.
	The facility may be terminated on the occurrence and failure to cure certain events, including, among others, failure of USSR to maintain certain ratios related to the collectability of the receivables and failure to make payment under its material debt obligations, and may also be terminated upon a change of control. The facility expires in July 2016.
	U. S. Steel Košice (USSK) credit facilities
	At March 31, 2015, USSK had no borrowings under its €200 million (approximately $215 million) unsecured revolving credit facility (the USSK Credit Agreement). The USSK Credit Agreement contains certain USSK financial covenants (as further defined in the USSK Credit Agreement), including maximum Leverage, maximum Net Debt to Tangible Net Worth, and minimum Interest Cover ratios. The covenants are measured semi-annually for the period covering the last twelve calendar months. USSK may not draw on the USSK Credit Agreement if it does not comply with any of the financial covenants until the next measurement date. At March 31, 2015, USSK had full availability under the USSK Credit Agreement. The USSK Credit Agreement expires in July 2016.
	At March 31, 2015, USSK had no borrowings under its €20 million and €10 million unsecured credit facilities (collectively approximately $31 million) and the availability was approximately $30 million due to approximately $1 million of customs and other guarantees outstanding.
	Change in control event
	If there is a change in control of U. S. Steel, the following may occur: (a) debt obligations totaling $2,891 million as of March 31, 2015 (including the Senior Notes and Senior Convertible Notes) may be declared immediately due and payable; (b) the Amended Credit Agreement, the RPA and the USSK Credit Agreement may be terminated and any amounts outstanding declared immediately due and payable; and (c) U. S. Steel may be required to either repurchase the leased Fairfield Works slab caster for $36 million or provide a letter of credit to secure the remaining obligation.

Asset_Retirement_Obligations_N

Asset Retirement Obligations (Notes)	3 Months Ended
	Mar. 31, 2015
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligations	Asset Retirement Obligations
	U. S. Steel’s asset retirement obligations (AROs) primarily relate to mine and landfill closure and post-closure costs. The following table reflects changes in the carrying values of AROs:
	(In millions)	March 31, 2015				December 31, 2014
	Balance at beginning of year	$	48			$	59
	Additional obligations incurred	44			(a)	6
	Obligations settled	—				(19		)	(b)
	Foreign currency translation effects	(1		)		(2		)
	Accretion expense	1				4
	Balance at end of period	$	92			$	48
	(a) Additional AROs relate to the permanent closure of the coke production facilities at Gary Works and Granite City Works.
	(b) Includes $16 million as a result of the deconsolidation of USSC as of the end of the day on September 15, 2014.
	Certain AROs related to disposal costs of the majority of fixed assets at our integrated steel facilities have not been recorded because they have an indeterminate settlement date. These AROs will be initially recognized in the period in which sufficient information exists to estimate their fair value.

Fair_Value_of_Financial_Instru

Fair Value of Financial Instruments (Notes)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Fair Value of Financial Instruments	Fair Value of Financial Instruments
	The carrying value of cash and cash equivalents, current accounts and notes receivable, investments and long-term receivables, accounts payable, bank checks outstanding, and accrued interest included in the consolidated balance sheet approximate fair value. See Note 11 for disclosure of U. S. Steel’s derivative instruments, which are accounted for at fair value on a recurring basis.
	The following table summarizes U. S. Steel’s financial assets and liabilities that were not carried at fair value at March 31, 2015 and December 31, 2014.
		31-Mar-15				December 31, 2014
	(In millions)	Fair		Carrying		Fair		Carrying
		Value		Amount		Value		Amount
	Financial liabilities:
	Long-term debt (a)	$	3,648	$	3,469	$	3,740	$	3,466
	(a) Excludes capital lease obligations.
	The following methods and assumptions were used to estimate the fair value of financial instruments included in the table above:
	Long-term debt: Fair value was determined using Level 2 inputs which were derived from quoted market prices and is based on the yield on public debt where available or current borrowing rates available for financings with similar terms and maturities.
	Fair value of the financial assets and liabilities disclosed herein is not necessarily representative of the amount that could be realized or settled, nor does the fair value amount consider the tax consequences of realization or settlement.
	Financial guarantees are U. S. Steel’s only unrecognized financial instrument. For details relating to financial guarantees see Note 19.

Statement_of_Changes_in_Stockh

Statement of Changes in Stockholders' Equity (Notes)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Statement of Changes in Stockholders' Equity	Statement of Changes in Stockholders’ Equity
	The following table reflects the first three months of 2015 and 2014 reconciliation of the carrying amount of total equity, equity attributable to U. S. Steel and equity attributable to noncontrolling interests:
	Three Months Ended March 31, 2015 (In millions)	Total			Retained			Accumulated			Common		Treasury			Paid-in		Non-
					Earnings			Other			Stock		Stock			Capital		Controlling
								Comprehensive										Interest
								(Loss) Income
	Balance at beginning of year	$	3,800		$	1,862		$	(1,441	)	$	151	$	(396	)	$	3,623	$	1
	Comprehensive income (loss):
	Net loss	(75		)	(75		)
	Other comprehensive income (loss), net of tax:
	Pension and other benefit adjustments	43						43
	Currency translation adjustment	(103		)				(103		)
	Employee stock plans	11											1			10
	Dividends paid on common stock	(7		)	(7		)
	Other	(1		)	(1		)
	Balance at March 31, 2015	$	3,668		$	1,779		$	(1,501	)	$	151	$	(395	)	$	3,633	$	1
	Three Months Ended March 31, 2014 (In millions)	Total			Retained			Accumulated			Common		Treasury			Paid-in		Non-
					Earnings			Other			Stock		Stock			Capital		Controlling
								Comprehensive										Interest
								(Loss) Income
	Balance at beginning of year	$	3,376		$	1,789		$	(1,752	)	$	151	$	(480	)	$	3,667	$	1
	Comprehensive income (loss):
	Net earnings	52			52
	Other comprehensive income (loss), net of tax:
	Pension and other benefit adjustments	50						50
	Currency translation adjustment	(2		)				(2		)
	Employee stock plans	9											1			8
	Dividends paid on common stock	(7		)	(7		)
	Balance at March 31, 2014	$	3,478		$	1,834		$	(1,704	)	$	151	$	(479	)	$	3,675	$	1

Reclassifications_from_Accumul

Reclassifications from Accumulated Other Comprehensive Income (AOCI) (Notes)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Reclassifications from Accumulated Other Comprehensive Income (AOCI)	Reclassifications from Accumulated Other Comprehensive Income (AOCI)
	(In millions) (a)		Pension and				Foreign				Other			Total
			Other Benefit				Currency
			Items				Items
	Balance at December 31, 2014		$	(1,852	)		$	416			$	(5	)	$	(1,441	)
	Other comprehensive (loss) income before reclassifications		(1		)		(103		)		(5		)	(109		)
	Amounts reclassified from AOCI		44			(b)	—				5			49
	Net current-period other comprehensive income		43				(103		)		—			(60		)
	Balance at March 31, 2015		$	(1,809	)		$	313			$	(5	)	$	(1,501	)
	(a)All amounts are net of tax. Amounts in parentheses indicate decreases in AOCI.
	(b)See table below for further details.
				Amount reclassified from AOCI
				Three Months Ended March 31,
	(In millions) (a)	Details about AOCI components		2015				2014
		Amortization of pension and other benefit items
		Prior service costs (b)		$	(2	)		$	(10	)
		Actuarial losses (b)		(66		)		(69		)
		Settlement, termination and curtailment gains (b)		(3		)		—
		Total before tax		(71		)		(79		)
		Tax benefit		27				28
		Net of tax		$	(44	)		$	(51	)
	(a)Amounts in parentheses indicate decreases in AOCI.
	(b)These AOCI components are included in the computation of net periodic benefit cost (see Note 5 for additional details).

Transactions_with_Related_Part

Transactions with Related Parties (Notes)	3 Months Ended
	Mar. 31, 2015
Related Party Transactions [Abstract]
Related Party Transactions	Transactions with Related Parties
	Net sales to related parties and receivables from related parties primarily reflect sales of steel products to equity investees and USSC after the CCAA filing on September 16, 2014. Generally, transactions are conducted under long-term market-based contractual arrangements. Related party sales and service transactions were $326 million and $279 million for the three months ended March 31, 2015 and 2014, respectively.
	Purchases from related parties for outside processing services provided by equity investees and steel products from USSC after the CCAA filing on September 16, 2014 amounted to $101 million and $15 million for the three months ended March 31, 2015 and 2014, respectively. Purchases of iron ore pellets from related parties amounted to $30 million and $54 million for the three months ended March 31, 2015 and 2014, respectively.
	Accounts payable to related parties include balances due to PRO-TEC Coating Company (PRO-TEC) of $86 million and $78 million at March 31, 2015 and December 31, 2014, respectively for invoicing and receivables collection services provided by U. S. Steel. U. S. Steel, as PRO-TEC’s exclusive sales agent, is responsible for credit risk related to those receivables. U. S. Steel also provides PRO-TEC marketing, selling and customer service functions. Payables to other related parties, including USSC after the CCAA filing on September 16, 2014, totaled $49 million and $53 million at March 31, 2015 and December 31, 2014, respectively.

Restructuring_and_Other_Charge

Restructuring and Other Charges (Notes)	3 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Restructuring and Other Charges	Restructuring and Other Charges
	During the three months ended March 31, 2015, the Company recorded a charge of $153 million, which is reported in restructuring and other charges in the consolidated statement of operations, related to the permanent shutdown of the cokemaking operations at Gary Works and Granite City Works, within our Flat-Rolled segment. In addition to the write-down of assets, the charge also includes employee related costs, including costs for severance, supplemental unemployment benefits and continuation of health care benefits of $18 million and other shutdown costs, primarily environmental.
	During the three months ended March 31, 2014, the Company recorded severance related charges of $2 million for headcount reductions within our Flat-Rolled segment related to our Canadian operations prior to the deconsolidation of USSC. Cash payments were made related to severance and exit costs of $4 million. Favorable adjustments for changes in estimates on restructuring reserves were made for $8 million.
	Charges for restructuring and ongoing cost reduction initiatives are recorded in the period the Company commits to a restructuring or cost reduction plan, or executes specific actions contemplated by the plan and all criteria for liability recognition have been met. Charges related to the restructuring and cost reductions include severance costs, accelerated depreciation, asset impairments and other closure costs.
	The activity in the accrued balances incurred in relation to restructuring and other cost reduction programs during the three months ended March 31, 2015 were as follows:
		Employee Related		Exit			Asset
	(in millions)	Costs		Costs			Impairments			Total
	Balance at December 31, 2014	$	5	$	—		$	—		$	5
	Additional charges	18		45		(a)	90			153
	Cash payments/utilization	—		—			(90		)	(90		)
	Other adjustments and reclassifications	—		—			—			—
	Balance at March 31, 2015	$	23	$	45		$	—		$	68
	(a) Primarily environmental costs.
	Accrued liabilities for restructuring and other cost reduction programs are included in the following balance sheet lines:
	(in millions)	March 31, 2015		December 31, 2014
	Accounts payable	$	28	$	—
	Payroll and benefits payable	23		5
	Deferred credits and other noncurrent liabilities	17		—
	Total	$	68	$	5

Contingencies_and_Commitments_

Contingencies and Commitments (Notes)	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Contingencies and Commitments	Contingencies and Commitments
	U. S. Steel is the subject of, or party to, a number of pending or threatened legal actions, contingencies and commitments involving a variety of matters, including laws and regulations relating to the environment. Certain of these matters are discussed below. The ultimate resolution of these contingencies could, individually or in the aggregate, be material to the consolidated financial statements. However, management believes that U. S. Steel will remain a viable and competitive enterprise even though it is possible that these contingencies could be resolved unfavorably.
	U. S. Steel accrues for estimated costs related to existing lawsuits, claims and proceedings when it is probable that it will incur these costs in the future.
	Asbestos matters – As of March 31, 2015, U. S. Steel was a defendant in approximately 900 active cases involving approximately 3,420 plaintiffs. The vast majority of these cases involve multiple defendants. At December 31, 2014, U. S. Steel was a defendant in approximately 880 active cases involving approximately 3,455 plaintiffs. About 2,540, or approximately 74 percent, of these plaintiff claims are currently pending in jurisdictions which permit filings with massive numbers of plaintiffs. Based upon U. S. Steel’s experience in such cases, it believes that the actual number of plaintiffs who ultimately assert claims against U. S. Steel will likely be a small fraction of the total number of plaintiffs. During the three months ended March 31, 2015, settlements and other dispositions resolved approximately 110 claims, and new case filings added approximately 75 claims. During 2014, settlements and other dispositions resolved approximately 190 cases, and new case filings added approximately 325 cases.
	The following table shows the activity with respect to asbestos litigation:
	Period ended		Opening		Claims	New		Closing
			Number		Dismissed,	Claims		Number
			of Claims		Settled			of Claims
					and Resolved
	December 31, 2012		3,235		190	285		3,330
	December 31, 2013		3,330		250	240		3,320
	December 31, 2014		3,320		190	325		3,455
	March 31, 2015		3,455		110	75		3,420
	Historically, asbestos-related claims against U. S. Steel fall into three major groups: (1) claims made by persons who allegedly were exposed to asbestos on the premises of U. S. Steel facilities; (2) claims made by persons allegedly exposed to products manufactured by U. S. Steel; and (3) claims made under certain federal and maritime laws by employees of former operations of U. S. Steel.
	The amount U. S. Steel accrues for pending asbestos claims is not material to U. S. Steel’s financial condition. However, U. S. Steel is unable to estimate the ultimate outcome of asbestos-related claims due to a number of uncertainties, including (1) the rates at which new claims are filed, (2) the number of and effect of bankruptcies of other companies traditionally defending asbestos claims, (3) uncertainties associated with the variations in the litigation process from jurisdiction to jurisdiction, (4) uncertainties regarding the facts, circumstances and disease process with each claim, and (5) any new legislation enacted to address asbestos-related claims. Despite these uncertainties, management believes that the ultimate resolution of these matters will not have a material adverse effect on U. S. Steel’s financial condition, although the resolution of such matters could significantly impact results of operations for a particular quarter.
	Environmental matters – U. S. Steel is subject to federal, state, local and foreign laws and regulations relating to the environment. These laws generally provide for control of pollutants released into the environment and require responsible parties to undertake remediation of hazardous waste disposal sites. Penalties may be imposed for noncompliance. Changes in accrued liabilities for remediation activities where U. S. Steel is identified as a named party are summarized in the following table:
	(In millions)	Three Months Ended March 31, 2015
	Beginning of period	$	212
	Accruals for environmental remediation deemed probable and reasonably estimable	—
	Obligations settled	(2		)
	End of period	$	210
	Accrued liabilities for remediation activities are included in the following consolidated balance sheet lines:
	(In millions)		March 31, 2015			December 31, 2014
	Accounts payable		$	19		$	19
	Deferred credits and other noncurrent liabilities		191			193
	Total		$	210		$	212
	Expenses related to remediation are recorded in cost of sales and were insignificant for both three month periods ended March 31, 2015 and March 31, 2014. It is not presently possible to estimate the ultimate amount of all remediation costs that might be incurred or the penalties that may be imposed. Due to uncertainties inherent in remediation projects and the associated liabilities, it is reasonably possible that total remediation costs for active matters may exceed the accrued liabilities by as much as 10 to 25 percent.
	Remediation Projects
	U. S. Steel is involved in environmental remediation projects at or adjacent to several current and former U. S. Steel facilities and other locations that are in various stages of completion ranging from initial characterization through post-closure monitoring. Based on the anticipated scope and degree of uncertainty of projects, we categorize projects as follows:
	-1	Projects with Ongoing Study and Scope Development are those projects which are still in the study and development phase. For these projects, the extent of remediation that may be required is not yet known, the remediation methods and plans are not yet developed, and cost estimates cannot be determined. Therefore, significant costs, in addition to the accrued liabilities for these projects, are reasonably possible.
	-2	Significant Projects with Defined Scope are those projects with significant accrued liabilities, a defined scope and little likelihood of significant additional costs.
	-3	Other Projects are those projects with relatively small accrued liabilities for which we believe that, while additional costs are possible, they are not likely to be significant, and those projects for which we do not yet possess sufficient information to estimate potential costs to U. S. Steel.
	Projects with Ongoing Study and Scope Development – There are five environmental remediation projects where reasonably possible additional costs for completion are not currently estimable, but could be material. These projects are four Resource Conservation and Recovery Act (RCRA) programs—at Fairfield Works, Lorain Tubular, USS-POSCO Industries (UPI) and the Fairless Plant—and a voluntary remediation program at the former steelmaking plant at Joliet, Illinois. As of March 31, 2015, accrued liabilities for these projects totaled $2 million for the costs of studies, investigations, interim measures, design and/or remediation. It is reasonably possible that additional liabilities associated with future requirements regarding studies, investigations, design and remediation for these projects could be as much as $25 million to $40 million.
	Significant Projects with Defined Scope – As of March 31, 2015, there are four significant projects with defined scope greater than or equal to $5 million each, with a total accrued liability of $159 million. These projects are Gary RCRA (accrued liability of $38 million), the former Geneva facility (accrued liability of $64 million), the former Duluth facility St. Louis River Estuary (accrued liability of $50 million), and the Solid Waste Management Unit (SWMU) #4 at UPI (accrued liability of $7 million).
	Other Projects – There are four other environmental remediation projects which each had an accrued liability of between $1 million and $5 million. The total accrued liability for these projects at March 31, 2015 was $8 million. These projects have progressed through a significant portion of the design phase and material additional costs are not expected.
	The remaining environmental remediation projects had an accrued liability of less than $1 million. The total accrued liability for these projects at March 31, 2015 was $6 million. We do not foresee material additional liabilities for any of these sites.
	Post-Closure Costs – Accrued liabilities for post-closure site monitoring and other costs at various closed landfills totaled $28 million at March 31, 2015 and were based on known scopes of work.
	Administrative and Legal Costs – As of March 31, 2015, U. S. Steel had an accrued liability of $7 million for administrative and legal costs related to environmental remediation projects. These accrued liabilities were based on projected administrative and legal costs for the next three years and do not change significantly from year to year.
	See Part II, "Item 1 – Legal Proceedings – Environmental Proceedings" for further details regarding U. S. Steel's environmental remediation at its various production facilities.
	Capital Expenditures – For a number of years, U. S. Steel has made substantial capital expenditures to bring existing facilities into compliance with various laws relating to the environment. In the first three months of 2015 and 2014, such capital expenditures totaled $23 million and $11 million, respectively. U. S. Steel anticipates making additional such expenditures in the future; however, the exact amounts and timing of such expenditures are uncertain because of the continuing evolution of specific regulatory requirements.
	CO2 Emissions – Current and potential regulation of greenhouse gas (GHG) emissions remains a significant issue for the steel industry, particularly for integrated steel producers such as U. S. Steel. The regulation of carbon dioxide (CO2) emissions has either become law or is being considered by legislative bodies of many nations, including countries where we have operating facilities. The European Union (EU) has established GHG regulations based upon national allocations and a cap and trade system. In the United States, the Environmental Protection Agency (EPA) has published rules for regulating GHG emissions for certain facilities (both new and existing). The U.S. Supreme Court has upheld the EPA's authority under the Clean Air Act (CAA) to regulate GHG emissions from new or modified stationary sources that are required to obtain pre-construction and operating permits for non-GHG regulated air pollutants, and federal courts are considering several suits that challenge the EPA's authority to regulate GHG emissions from other types of sources (including existing sources). Congress could take additional action to increase the regulation of GHG emissions.
	The European Commission (EC) has created an Emissions Trading System (ETS) and starting in 2013, the ETS began to employ centralized allocation, rather than national allocation plans, that are more stringent than the previous requirements. The ETS also includes a cap designed to achieve an overall reduction of GHGs for the ETS sectors of 21% in 2020 compared to 2005 emissions and auctioning as the basic principle for allocating emissions allowances, with some transitional free allocation provided on the basis of benchmarks for manufacturing industries under risk of transferring their production to other countries with lesser constraints on GHG emissions, commonly referred to as carbon leakage. Manufacturing of sinter, coke oven products, basic iron and steel, ferro-alloys and cast iron tubes have all been recognized as exposing companies to a significant risk of carbon leakage, but the ETS is still expected to lead to additional costs for steel companies in Europe. The EU has imposed limitations under the ETS for the period 2013-2020 (Phase III) that are more stringent than those in the 2008-2012 period (NAP II), reducing the number of free allowances granted to companies to cover their CO2 emissions.
	In September of 2013, the EC issued EU wide legislation further reducing the expected free allocation for Phase III by an average of approximately 12 percent. USSK's final allocation for the Phase III period that was approved by the EC in January 2014 is approximately 48 million allowances. Based on 2014 emission intensity levels and projected future production levels, and as a result of carryover allowances from the NAP II period, we do not currently anticipate the need to purchase credits until 2018, and we currently estimate a shortfall of 16 million allowances for the Phase III period. However, due to a number of variable factors such as the future market value of allowances, future production levels and future emission intensity levels, we cannot reliably estimate the full cost of complying with the ETS regulations at this time.
	U. S. Steel entered into transactions to sell and swap a portion of our emission allowances and recognized a gain of $17 million during the three months ended March 31, 2014, reflected as a net gain on disposal of assets. There were no such similar transactions for the three months ended March 31, 2015.
	On May 13, 2010, the EPA published its final Greenhouse Gas Tailoring Rule establishing a mechanism for regulating GHG emissions from facilities through the CAA’s Prevention of Significant Deterioration (PSD) permitting program. Under the Greenhouse Gas Tailoring Rule, as modified by the recent U.S. Supreme Court decision upholding the rule, new projects that increase GHG emissions by a significant amount (generally more than 75,000 tons of CO2 per year) are subject to the PSD requirements, including the installation of best available control technology (BACT), if the project also significantly increases emissions of at least one non-GHG pollutant. On January 8, 2014, the EPA published proposed New Source Performance Standards (NSPS) for GHG emissions from new electric generating units (EGUs). As a result of that rule, on June 18, 2014, the EPA also published proposed guidance under CAA Section 111(d) to regulate CO2 emissions from EGUs. Additionally, the EPA recently revised the National Ambient Air Quality Standards (NAAQS) for nitrogen oxide, sulfur dioxide, particulate matter, and lead, and in December 2014, proposed to lower the ozone NAAQS to a level within the range of 65 to 70 parts per billion (ppb).
	It is impossible to estimate the timing or impact of these or other future government action on U. S. Steel, although it could be significant. Such impacts may include substantial capital expenditures, costs for emission allowances, restriction of production, and higher prices for coking coal, natural gas and electricity generated by carbon based systems.
	EU Environmental Requirements – Slovakia adopted a new waste code in March 2015 that will become effective January 1, 2016. This legislation implements the EU Waste Framework Directive that strictly regulates waste disposal and encourages recycling, among other provisions, by increasing fees for waste disposed of in landfills, including privately owned industrial landfills. We are currently analyzing the legislation in order to estimate the potential financial impact on USSK's operations.
	The EU’s Industry Emission Directive will require implementation of EU determined best available techniques (BAT) to reduce environmental impacts as well as compliance with BAT associated emission levels. This directive includes operational requirements for air emissions, wastewater discharges, solid waste disposal and energy conservation, dictates certain operating practices and imposes stricter emission limits. Producers will be required to be in compliance with the iron and steel BAT by March 8, 2016, unless specific exceptions or extensions are granted by the Slovak environmental authority. We are currently evaluating the costs of complying with BAT, but our most recent broad estimate of likely capital expenditures is €80 million to €155 million (approximately $86 million to $167 million) over the 2015 to 2020 period. There are ongoing efforts to seek EU grants to fund a portion of these capital expenditures. The EU has various programs under which funds are allocated to member states to implement broad public policies, which are then awarded by the member states to public and private entities on a competitive basis. The total capital expenditures required for BAT compliance will depend upon, among other factors, the extent to which EU incentive grants are awarded for these projects. We also believe there will be increased operating costs, such as increased energy and maintenance costs, but we are currently unable to reliably estimate them.
	Due to other EU legislation, we will be required to make changes to the boilers at our steam and power generation plant in order to comply with stricter air emission limits for large combustion plants. In January 2014, the operation of USSK's boilers was approved by the EC as part of Slovakia's Transitional National Plan (TNP) for bringing all boilers in Slovakia into compliance by no later than 2020. The TNP establishes parameters for determining the date by which specific boilers are required to reach compliance with the new air standards, which has been determined to be October 2017 for our boilers. The boiler projects have been approved by our Board of Directors and we are now in the execution phase. These projects will result in a reduction in electricity, operating, maintenance and waste disposal costs once completed. The current projected cost to reconstruct one existing boiler and build one new boiler to achieve compliance is approximately $170 million. Broad legislative changes were enacted by the Slovak Republic to extend the scope of support for renewable sources of energy, that are intended to allow USSK to participate in Slovakia's renewable energy incentive program once both boiler projects are completed.
	Guarantees – The maximum guarantees of the indebtedness of unconsolidated entities of U. S. Steel totaled $4 million at March 31, 2015.
	EPA Region V Federal Lawsuit – On August 1, 2012, the EPA, joined by the States of Illinois, Indiana and Michigan, initiated an action in the Northern District of Indiana alleging various air regulatory violations at Gary Works, Granite City Works, and Great Lakes Works. The action contends that Gary Works failed to obtain the proper CAA pre-construction permit for a routine reline of its Blast Furnace No. 4 in 1990, and that the three facilities failed to meet certain operational, maintenance, opacity, and recordkeeping requirements. Civil penalties and injunctive relief is requested. U. S. Steel believes that the claims asserted in the action are not justified and are without legal foundation. The Court has dismissed all claims related to the Blast Furnace No. 4 reline. Fact discovery on the remaining claims is being conducted in three phases with discovery regarding Granite City Works and Great Lakes Works now complete. U. S. Steel will continue to vigorously defend against these claims. At this time, the potential outcome on the asserted claims is not reasonably estimable.
	CCAA - On September 16, 2014 USSC commenced court-supervised restructuring proceedings under CCAA before the Ontario Superior Court of Justice. As part of the CCAA proceedings, U. S. Steel has submitted both secured and unsecured claims that have been verified by the court-appointed Monitor. As of March 31, 2015, the court-appointed Monitor has verified U. S. Steel's claims in the CCAA proceedings are approximately $1.8 billion. U. S. Steel's claims have been challenged by a number of interested parties which, if successful, could result in the reclassification of those claims and/or modifications to the values of those claims. U. S. Steel is contesting those challenges within the CCAA proceedings, the outcome of which can not be reasonably estimated at this time.
	Other contingencies – Under certain operating lease agreements covering various equipment, U. S. Steel has the option to renew the lease or to purchase the equipment at the end of the lease term. If U. S. Steel does not exercise the purchase option by the end of the lease term, U. S. Steel guarantees a residual value of the equipment as determined at the lease inception date (totaling approximately $12 million at March 31, 2015). No liability has been recorded for these guarantees as the potential loss is not probable.
	Insurance – U. S. Steel maintains insurance for certain property damage, equipment, business interruption and general liability exposures; however, insurance is applicable only after certain deductibles and retainages. U. S. Steel is self-insured for certain other exposures including workers’ compensation (where permitted by law) and auto liability. Liabilities are recorded for workers’ compensation and personal injury obligations. Other costs resulting from losses under deductible or retainage amounts or not otherwise covered by insurance are charged against income upon occurrence.
	U. S. Steel uses surety bonds, trusts and letters of credit to provide whole or partial financial assurance for certain obligations such as workers’ compensation. The total amount of active surety bonds, trusts and letters of credit being used for financial assurance purposes was approximately $165 million as of March 31, 2015, which reflects U. S. Steel’s maximum exposure under these financial guarantees, but not its total exposure for the underlying obligations. A significant portion of our trust arrangements and letters of credit are collateralized by our RPA. The remaining trust arrangements and letters of credit are collateralized by restricted cash. Restricted cash, which is recorded in other current and noncurrent assets, totaled $48 million at March 31, 2015, of which approximately $1 million was classified as current, and $51 million at December 31, 2014, of which $1 million was classified as current. Restricted cash at March 31, 2015 also includes $4 million to fund certain capital projects at Granite City Works. The proceeds become unrestricted as capital expenditures for these projects are made.
	Capital Commitments – At March 31, 2015, U. S. Steel’s contractual commitments to acquire property, plant and equipment totaled $352 million.
	Contractual Purchase Commitments – U. S. Steel is obligated to make payments under contractual purchase commitments, including unconditional purchase obligations. Payments for contracts with remaining terms in excess of one year are summarized below (in millions):
	Remainder of 2015		2016		2017	2018		2019	Later	Total
									Years
	$588		$704		$558	$539		$286	$923	$3,598
	The majority of U. S. Steel’s unconditional purchase obligations relates to the supply of industrial gases, and certain energy and utility services with terms ranging from two to 13 years. Unconditional purchase obligations also include coke and steam purchase commitments related to a coke supply agreement with Gateway Energy & Coke Company LLC (Gateway) under which Gateway is obligated to supply 90 percent to 105 percent of the expected annual capacity of the heat recovery coke plant, and U. S. Steel is obligated to purchase the coke from Gateway at the contract price. As of March 31, 2015, a maximum default payment of approximately $232 million would apply if U. S. Steel terminates the agreement.
	Total payments relating to unconditional purchase obligations were $111 million and $134 million for the three months ended March 31, 2015 and 2014, respectively.

Segment_Information_Tables

Segment Information (Tables)	3 Months Ended
	Mar. 31, 2015
Segment Reporting [Abstract]
Results of Segment Operations	The results of segment operations for the three months ended March 31, 2015 and 2014 are:
	(In millions) First Quarter 2015	Customer			Intersegment			Net			Earnings			EBIT
		Sales			Sales			Sales			(loss)
											from
											investees
	Flat-Rolled	$	2,194		$	103		$	2,297		$	5		$	(67	)
	USSE	691			1			692			—			37
	Tubular	371			—			371			3			1
	Total reportable segments	3,256			104			3,360			8			(29		)
	Other Businesses	16			28			44			(2		)	8
	Reconciling Items and Eliminations	—			(132		)	(132		)	—			(166		)
	Total	$	3,272		$	—		$	3,272		$	6		$	(187	)
	First Quarter 2014
	Flat-Rolled	$	3,027		$	303		$	3,330		$	(6	)	$	85
	USSE	759			1			760			—			32
	Tubular	643			1			644			2			24
	Total reportable segments	4,429			305			4,734			(4		)	141
	Other Businesses	19			34			53			—			13
	Reconciling Items and Eliminations	—			(339		)	(339		)	—			(32		)
	Total	$	4,448		$	—		$	4,448		$	(4	)	$	122
Schedule of reconciling items to EBIT	The following is a schedule of reconciling items to EBIT:
		Three Months Ended March 31,
	(In millions)	2015			2014
	Items not allocated to segments:
	Postretirement benefit expense (a)	$	(13	)	$	(32	)
	Other items not allocated to segments:
	Loss on shutdown of coke production facilities (b)	(153		)	—
	Total other items not allocated to segments	(153		)	—
	Total reconciling items	$	(166	)	$	(32	)
	(a) Consists of the net periodic benefit cost elements, other than service cost and amortization of prior service cost for active
	employees, associated with our defined pension, retiree health care and life insurance benefit plans.
	(b) Included in Restructuring and Other Charges on the Consolidated Statements of Operations. See Note 18 to the Consolidated Financial Statements.

Intangible_Assets_Tables

Intangible Assets (Tables)	3 Months Ended
	Mar. 31, 2015
Goodwill and Intangible Assets Disclosure [Abstract]
Amortizable Intangible Assets	Intangible assets are being amortized on a straight-line basis over their estimated useful lives and are detailed below:
			As of March 31, 2015						As of December 31, 2014
	(In millions)	Useful	Gross		Accumulated		Net		Gross		Accumulated		Net
		Lives	Carrying		Amortization		Amount		Carrying		Amortization		Amount
			Amount						Amount
	Customer relationships	22-23 Years	$	132	$	48	$	84	$	132	$	46	$	86
	Other	2-20 Years	23		13		10		23		13		10
	Total amortizable intangible assets		$	155	$	61	$	94	$	155	$	59	$	96

Pensions_and_Other_Benefits_Ta

Pensions and Other Benefits (Tables)	3 Months Ended
	Mar. 31, 2015
Compensation and Retirement Disclosure [Abstract]
Net Periodic Benefit Cost	The following table reflects the components of net periodic benefit cost for the three months ended March 31, 2015 and 2014:
		Pension						Other
		Benefits						Benefits
	(In millions)	2015			2014			2015			2014
	Service cost	$	26		$	27		$	5		$	6
	Interest cost	66			109			24			36
	Expected return on plan assets	(110		)	(153		)	(38		)	(35		)
	Amortization of prior service cost	4			6			(2		)	(3		)
	Amortization of actuarial net loss	64			70			2			(1		)
	Net periodic benefit cost, excluding below	50			59			(9		)	3
	Multiemployer plans	18			18			—			—
	Settlement, termination and curtailment losses	3			7			—			—
	Net periodic benefit cost	$	71		$	84		$	(9	)	$	3

StockBased_Compensation_Plans_1

Stock-Based Compensation Plans (Tables)	3 Months Ended
	Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Summary of Awards Made under Plans	The following table is a general summary of the awards made under the Plan. There were no issuances of stock options or restricted stock units during the first quarter of 2014.
		2015				2014
	Grant Details	Shares(a)		Fair Value(b)		Shares(a)	Fair Value(b)
	Stock Options	1,067,190		$	10.04	—	$	—
	Restricted Stock Units	765,750		$	24.75	—	$	—
	Performance Awards:(c)
	TSR	273,560		$	24.95	279,570	$	21.99
	ROCE (d)	—		$	—	259,280	$	23.71
	(a) The share amounts shown in this table do not reflect an adjustment for estimated forfeitures.
	(b) Represents the per share weighted-average for all grants during the quarter.
	(c) The number of performance awards shown represents the target value of the award.
	(d) In lieu of ROCE equity awards being granted in 2015, the Company granted cash settled ROCE incentives to certain members of executive management.
Black-Scholes Assumptions	Compensation expense for stock options is recorded over the vesting period based on the fair value on the date of grant, as calculated by U. S. Steel using the Black-Scholes model and the assumptions listed below. The stock options vest ratably over a three-year service period and have a term of ten years.
	Black-Scholes Assumptions		2015 Grants
	Grant date price per share of option award		$	24.78
	Exercise price per share of option award		$	24.78
	Expected annual dividends per share, at grant date		$	0.2
	Expected life in years		5
	Expected volatility		47		%
	Risk-free interest rate		1.6		%
	Grant date fair value per share of unvested option awards as calculated from above		$	10.04

Earnings_and_Dividends_Per_Com

Earnings and Dividends Per Common Share (Tables)	3 Months Ended
	Mar. 31, 2015
Earnings Per Share [Abstract]
Computations for Basic and Diluted Income (Loss) Per Common Share from Continuing Operations	The computations for basic and diluted earnings per common share from continuing operations are as follows:
		Three Months Ended March 31,
	(Dollars in millions, except per share amounts)	2015				2014
	Net (loss) earnings attributable to United States Steel Corporation stockholders	$	(75	)		$	52
	Plus earnings effect of assumed conversion-interest on convertible notes	—				2
	Net (loss) earnings after assumed conversion	$	(75	)		$	54
	Weighted-average shares outstanding (in thousands):
	Basic	145,733				144,757
	Effect of convertible notes	—				10,058
	Effect of stock options, restricted stock units and performance awards	—				1,299
	Adjusted weighted-average shares outstanding, diluted	145,733				156,114
	Basic earnings per common share	$	(0.52	)		$	0.36
	Diluted earnings per common share	$	(0.52	)		$	0.34
Antidilutive Securities that were Not Included in Computations of Diluted Income (Loss) Per Common Share	The following table summarizes the securities that were antidilutive, and therefore, were not included in the computations of diluted earnings per common share:
		Three Months Ended March 31,
	(In thousands)	2015			2014
	Securities granted under the 2005 Stock Incentive Plan	10,056			2,336

Inventories_Tables

Inventories (Tables)	3 Months Ended
	Mar. 31, 2015
Inventory Disclosure [Abstract]
Inventories
	(In millions)	March 31, 2015		December 31, 2014
	Raw materials	$	864	$	801
	Semi-finished products	982		1,053
	Finished products	502		563
	Supplies and sundry items	70		79
	Total	$	2,418	$	2,496

Derivative_Instruments_Tables

Derivative Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Location and Amounts of Fair Values Related to Derivatives in Financial Statements	The following summarizes the location and amounts of the fair values and gains or losses related to derivatives included in U. S. Steel's consolidated financial statements as of March 31, 2015 and December 31, 2014 and for the three months ended March 31, 2015 and 2014:
			Fair Value		Fair Value
	(In millions)	Balance Sheet	31-Mar-15		31-Dec-14
		Location
	Foreign exchange forward contracts	Accounts receivable	$	49	$	31
	Foreign exchange forward contracts	Accounts payable	$	1	$	—
Location and Amounts of Gains or Losses Related to Derivatives in Financial Statements
	(In millions)	Statement of	Amount of Gain		Amount of Gain
		Operations
		Location	Three Months Ended March 31, 2015		Three Months Ended March 31, 2014
	Foreign exchange forward contracts	Other financial	$	43	$	—
		costs

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2015
Debt Disclosure [Abstract]
Debt
	(In millions)	Interest		Maturity	March 31, 2015		December 31, 2014
		Rates %
	2037 Senior Notes	6.65		2037	$	350	$	350
	2022 Senior Notes	7.5		2022	400		400
	2021 Senior Notes	6.875		2021	275		275
	2020 Senior Notes	7.375		2020	600		600
	2018 Senior Notes	7		2018	500		500
	2017 Senior Notes	6.05		2017	450		450
	2019 Senior Convertible Notes(a)	2.75		2019	316		316
	Environmental Revenue Bonds	5.38 - 6.88		2015 - 2042	549		549
	Recovery Zone Facility Bonds	6.75		2040	70		70
	Fairfield Caster Lease			2022	33		33
	Other capital leases and all other obligations			2019	1		—
	Amended Credit Agreement	Variable		2016	—		—
	USSK Revolver	Variable		2016	—		—
	USSK credit facilities	Variable		2015 - 2016	—		—
	Total Debt				3,544		3,543
	Less unamortized discount				42		45
	Less short-term debt and long-term debt due within one year(a)				378		378
	Long-term debt				$	3,124	$	3,120
	(a) The 2019 Senior Convertible Notes were reclassified to current as a result of USSC's CCAA filing.
Eligible Accounts Receivable and Receivables Sold to Third-Party Conduits	The eligible accounts receivable and receivables sold to third party conduits are summarized below:
	(In millions)	March 31, 2015			December 31, 2014
	Balance of accounts receivable-net, eligible for sale to third-parties	$	782		$	1,013
	Accounts receivable sold to third-parties	—			—
	Balance included in Receivables on the balance sheet of U. S. Steel	$	782		$	1,013

Asset_Retirement_Obligations_T

Asset Retirement Obligations (Tables)	3 Months Ended
	Mar. 31, 2015
Asset Retirement Obligation Disclosure [Abstract]
Changes in Carrying Values of Asset Retirement Obligations	The following table reflects changes in the carrying values of AROs:
	(In millions)	March 31, 2015				December 31, 2014
	Balance at beginning of year	$	48			$	59
	Additional obligations incurred	44			(a)	6
	Obligations settled	—				(19		)	(b)
	Foreign currency translation effects	(1		)		(2		)
	Accretion expense	1				4
	Balance at end of period	$	92			$	48
	(a) Additional AROs relate to the permanent closure of the coke production facilities at Gary Works and Granite City Works.
	(b) Includes $16 million as a result of the deconsolidation of USSC as of the end of the day on September 15, 2014.

Fair_Value_of_Financial_Instru1

Fair Value of Financial Instruments (Tables)	3 Months Ended
	Mar. 31, 2015
Fair Value Disclosures [Abstract]
Financial Assets and Liabilities Not Carried at Fair Value	The following table summarizes U. S. Steel’s financial assets and liabilities that were not carried at fair value at March 31, 2015 and December 31, 2014.
		31-Mar-15				December 31, 2014
	(In millions)	Fair		Carrying		Fair		Carrying
		Value		Amount		Value		Amount
	Financial liabilities:
	Long-term debt (a)	$	3,648	$	3,469	$	3,740	$	3,466
	(a) Excludes capital lease obligations.

Statement_of_Changes_in_Stockh1

Statement of Changes in Stockholders' Equity (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Consolidated Statement of Changes in Equity	The following table reflects the first three months of 2015 and 2014 reconciliation of the carrying amount of total equity, equity attributable to U. S. Steel and equity attributable to noncontrolling interests:
	Three Months Ended March 31, 2015 (In millions)	Total			Retained			Accumulated			Common		Treasury			Paid-in		Non-
					Earnings			Other			Stock		Stock			Capital		Controlling
								Comprehensive										Interest
								(Loss) Income
	Balance at beginning of year	$	3,800		$	1,862		$	(1,441	)	$	151	$	(396	)	$	3,623	$	1
	Comprehensive income (loss):
	Net loss	(75		)	(75		)
	Other comprehensive income (loss), net of tax:
	Pension and other benefit adjustments	43						43
	Currency translation adjustment	(103		)				(103		)
	Employee stock plans	11											1			10
	Dividends paid on common stock	(7		)	(7		)
	Other	(1		)	(1		)
	Balance at March 31, 2015	$	3,668		$	1,779		$	(1,501	)	$	151	$	(395	)	$	3,633	$	1
	Three Months Ended March 31, 2014 (In millions)	Total			Retained			Accumulated			Common		Treasury			Paid-in		Non-
					Earnings			Other			Stock		Stock			Capital		Controlling
								Comprehensive										Interest
								(Loss) Income
	Balance at beginning of year	$	3,376		$	1,789		$	(1,752	)	$	151	$	(480	)	$	3,667	$	1
	Comprehensive income (loss):
	Net earnings	52			52
	Other comprehensive income (loss), net of tax:
	Pension and other benefit adjustments	50						50
	Currency translation adjustment	(2		)				(2		)
	Employee stock plans	9											1			8
	Dividends paid on common stock	(7		)	(7		)
	Balance at March 31, 2014	$	3,478		$	1,834		$	(1,704	)	$	151	$	(479	)	$	3,675	$	1

Reclassifications_from_Accumul1

Reclassifications from Accumulated Other Comprehensive Income (AOCI) (Tables)	3 Months Ended
	Mar. 31, 2015
Equity [Abstract]
Other Comprehensive Income Activity Net of Tax
	(In millions) (a)		Pension and				Foreign				Other			Total
			Other Benefit				Currency
			Items				Items
	Balance at December 31, 2014		$	(1,852	)		$	416			$	(5	)	$	(1,441	)
	Other comprehensive (loss) income before reclassifications		(1		)		(103		)		(5		)	(109		)
	Amounts reclassified from AOCI		44			(b)	—				5			49
	Net current-period other comprehensive income		43				(103		)		—			(60		)
	Balance at March 31, 2015		$	(1,809	)		$	313			$	(5	)	$	(1,501	)
	(a)All amounts are net of tax. Amounts in parentheses indicate decreases in AOCI.
	(b)See table below for further details.
Defined Benefit Plan In other Comprehensive Income
				Amount reclassified from AOCI
				Three Months Ended March 31,
	(In millions) (a)	Details about AOCI components		2015				2014
		Amortization of pension and other benefit items
		Prior service costs (b)		$	(2	)		$	(10	)
		Actuarial losses (b)		(66		)		(69		)
		Settlement, termination and curtailment gains (b)		(3		)		—
		Total before tax		(71		)		(79		)
		Tax benefit		27				28
		Net of tax		$	(44	)		$	(51	)
	(a)Amounts in parentheses indicate decreases in AOCI.
	(b)These AOCI components are included in the computation of net periodic benefit cost (see Note 5 for additional details).

Restructuring_and_Other_Charge1

Restructuring and Other Charges (Tables)	3 Months Ended
	Mar. 31, 2015
Restructuring and Related Activities [Abstract]
Activity in Accrued Balances for Restructuring and Other Cost Reduction Programs	The activity in the accrued balances incurred in relation to restructuring and other cost reduction programs during the three months ended March 31, 2015 were as follows:
		Employee Related		Exit			Asset
	(in millions)	Costs		Costs			Impairments			Total
	Balance at December 31, 2014	$	5	$	—		$	—		$	5
	Additional charges	18		45		(a)	90			153
	Cash payments/utilization	—		—			(90		)	(90		)
	Other adjustments and reclassifications	—		—			—			—
	Balance at March 31, 2015	$	23	$	45		$	—		$	68
	(a) Primarily environmental costs.
Balance Sheet Location of Accrued Liabilities for Restructuring and Other Cost Reduction Programs	Accrued liabilities for restructuring and other cost reduction programs are included in the following balance sheet lines:
	(in millions)	March 31, 2015		December 31, 2014
	Accounts payable	$	28	$	—
	Payroll and benefits payable	23		5
	Deferred credits and other noncurrent liabilities	17		—
	Total	$	68	$	5

Contingencies_and_Commitments_1

Contingencies and Commitments (Tables)	3 Months Ended
	Mar. 31, 2015
Commitments and Contingencies Disclosure [Abstract]
Asbestos Litigation Activity	The following table shows the activity with respect to asbestos litigation:
	Period ended		Opening		Claims	New		Closing
			Number		Dismissed,	Claims		Number
			of Claims		Settled			of Claims
					and Resolved
	December 31, 2012		3,235		190	285		3,330
	December 31, 2013		3,330		250	240		3,320
	December 31, 2014		3,320		190	325		3,455
	March 31, 2015		3,455		110	75		3,420
Changes in Accrued Liabilities for Remediation Activities	Changes in accrued liabilities for remediation activities where U. S. Steel is identified as a named party are summarized in the following table:
	(In millions)	Three Months Ended March 31, 2015
	Beginning of period	$	212
	Accruals for environmental remediation deemed probable and reasonably estimable	—
	Obligations settled	(2		)
	End of period	$	210
Accrued Liabilities for Remediation Activities Included in Balance Sheet	Accrued liabilities for remediation activities are included in the following consolidated balance sheet lines:
	(In millions)		March 31, 2015			December 31, 2014
	Accounts payable		$	19		$	19
	Deferred credits and other noncurrent liabilities		191			193
	Total		$	210		$	212
Payments for Contracts with Remaining Terms in Excess of One Year	Payments for contracts with remaining terms in excess of one year are summarized below (in millions):
	Remainder of 2015		2016		2017	2018		2019	Later	Total
									Years
	$588		$704		$558	$539		$286	$923	$3,598

Segment_Information_Results_of

Segment Information - Results of Segment Operations (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting Information [Line Items]
Customer Sales	$3,272	$4,448
Earnings (loss) from investees	6	-4
EBIT	-187	122
Flat-Rolled
Segment Reporting Information [Line Items]
Customer Sales	2,297	3,330
Earnings (loss) from investees	5	-6
EBIT	-67	85
USSE
Segment Reporting Information [Line Items]
Customer Sales	692	760
Earnings (loss) from investees	0	0
EBIT	37	32
Tubular
Segment Reporting Information [Line Items]
Customer Sales	371	644
Earnings (loss) from investees	3	2
EBIT	1	24
Total reportable segments
Segment Reporting Information [Line Items]
Customer Sales	3,360	4,734
Earnings (loss) from investees	8	-4
EBIT	-29	141
Other Businesses
Segment Reporting Information [Line Items]
Customer Sales	44	53
Earnings (loss) from investees	-2	0
EBIT	8	13
Reconciling Items and Eliminations
Segment Reporting Information [Line Items]
Customer Sales	-132	-339
Earnings (loss) from investees	0	0
EBIT	-166	-32
Revenues from External Customers
Segment Reporting Information [Line Items]
Customer Sales	3,272	4,448
Revenues from External Customers | Flat-Rolled
Segment Reporting Information [Line Items]
Customer Sales	2,194	3,027
Revenues from External Customers | USSE
Segment Reporting Information [Line Items]
Customer Sales	691	759
Revenues from External Customers | Tubular
Segment Reporting Information [Line Items]
Customer Sales	371	643
Revenues from External Customers | Total reportable segments
Segment Reporting Information [Line Items]
Customer Sales	3,256	4,429
Revenues from External Customers | Other Businesses
Segment Reporting Information [Line Items]
Customer Sales	16	19
Revenues from External Customers | Reconciling Items and Eliminations
Segment Reporting Information [Line Items]
Customer Sales	0	0
Intersegment Eliminations
Segment Reporting Information [Line Items]
Customer Sales	0	0
Intersegment Eliminations | Flat-Rolled
Segment Reporting Information [Line Items]
Customer Sales	103	303
Intersegment Eliminations | USSE
Segment Reporting Information [Line Items]
Customer Sales	1	1
Intersegment Eliminations | Tubular
Segment Reporting Information [Line Items]
Customer Sales	0	1
Intersegment Eliminations | Total reportable segments
Segment Reporting Information [Line Items]
Customer Sales	104	305
Intersegment Eliminations | Other Businesses
Segment Reporting Information [Line Items]
Customer Sales	28	34
Intersegment Eliminations | Reconciling Items and Eliminations
Segment Reporting Information [Line Items]
Customer Sales	($132)	($339)

Segment_Information_Schedule_o

Segment Information - Schedule of Reconciling Items to Income (Loss) from Operations (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Other items not allocated to segments:
Restructuring Charges	$153
Total reconciling items	-187	122
Reconciling Items and Eliminations
Items not allocated to segments:
Postretirement benefit expense	-13	-32
Other items not allocated to segments:
Total other items not allocated to segments	-153	0
Total reconciling items	-166	-32
Coke Production Facilities [Member] | Reconciling Items and Eliminations
Other items not allocated to segments:
Restructuring Charges	($153)	$0

Segment_Information_Additional

Segment Information - Additional Information (Detail)	3 Months Ended
	Mar. 31, 2015
	Segment
Segment Reporting [Abstract]
Number of reportable segments	3

Intangible_Assets_Amortizable_

Intangible Assets - Amortizable Intangible Assets (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	155	$155
Accumulated Amortization	61	59
Net Amount	94	96
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	132	132
Accumulated Amortization	48	46
Net Amount	84	86
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Lives	22 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Lives	23 years
Other
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Amount	23	23
Accumulated Amortization	13	13
Net Amount	10	$10
Other | Minimum
Finite-Lived Intangible Assets [Line Items]
Useful Lives	2 years
Other | Maximum
Finite-Lived Intangible Assets [Line Items]
Useful Lives	20 years

Intangible_Assets_Additional_I

Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2013	Dec. 31, 2014
Indefinite-lived Intangible Assets [Line Items]
Acquisition of intangible assets			$12
Aggregate purchase price			36
Maximum potential liability for contingent consideration	53
Fair value of contingent consideration	24
Amortization expense	2	2
Expected amortization expense, remainder of current year	5
Expected amortization expense, for 2016	7
Expected amortization expense, for 2017	7
Expected amortization expense, for 2018	7
Expected amortization expense, for 2019	7
Use Rights
Indefinite-lived Intangible Assets [Line Items]
Carrying amount of acquired water rights with indefinite lives	75			75
Developed Technology Rights [Member]
Indefinite-lived Intangible Assets [Line Items]
Amount allocated to indefinite-lived intangible assets			$33

Pensions_and_Other_Benefits_Ne

Pensions and Other Benefits - Net Periodic Benefit Costs (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Pension Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	$26	$27
Interest cost	66	109
Expected return on plan assets	-110	-153
Amortization of prior service cost	4	6
Amortization of actuarial net loss	64	70
Net periodic benefit cost, excluding below	50	59
Multiemployer plans	18	18
Settlement, termination and curtailment losses/(gains)	3	7
Net periodic benefit cost	71	84
Other Benefits
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	5	6
Interest cost	24	36
Expected return on plan assets	-38	-35
Amortization of prior service cost	-2	-3
Amortization of actuarial net loss	2	-1
Net periodic benefit cost, excluding below	-9	3
Multiemployer plans	0	0
Settlement, termination and curtailment losses/(gains)	0	0
Net periodic benefit cost	($9)	$3

Pensions_and_Other_Benefits_Ad

Pensions and Other Benefits - Additional Information (Detail) (USD $)	1 Months Ended	3 Months Ended		1 Months Ended
In Millions, unless otherwise specified	Nov. 30, 2013	Mar. 31, 2015	Mar. 31, 2014	Aug. 31, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cash contribution by employer to defined contribution plans		$10	$12
Non-retirement postemployment benefits		14
Amount of contributions authorized by the board of directors	300
Steelworkers Pension Trust
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions, defined benefit plans		21
Other Pension Plans, Defined Benefit
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions, defined benefit plans		8
Unfunded Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Cash contribution by employer to pension plans		43
Retiree Health Care And Life Insurance Trust
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Contribution to a restricted account within trust for represented retiree health care and life insurance benefits		10
Main Pension Plan
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Employer contributions, defined benefit plans				$140

StockBased_Compensation_Plans_2

Stock-Based Compensation Plans - Summary of Awards Made under Plans (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares - Stock Options	1,067,190	0
Grant date fair value per share of unvested option awards as calculated from above	$10.04	$0
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares - Other than Stock Options	765,750	0
Fair Value - Other than Stock Options	$24.75	$0
Total Shareholder Return (TSR) Performance Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares - Other than Stock Options	273,560	279,570
Fair Value - Other than Stock Options	$24.95	$21.99
Return On Capital Employed (ROCE) Performance Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares - Other than Stock Options	0	259,280
Fair Value - Other than Stock Options	$0	$23.71

StockBased_Compensation_Plans_3

Stock-Based Compensation Plans - Black-Scholes Assumptions (Detail) (Stock Options, USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant date price per share of option award	$24.78
Exercise price per share of option award	$24.78
Expected annual dividends per share, at grant date	$0.20
Expected life in years	5 years
Expected volatility	47.00%
Risk-free interest rate	1.60%
Grant date fair value per share of unvested option awards as calculated from above	$10.04	$0

StockBased_Compensation_Plans_4

Stock-Based Compensation Plans - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, except Share data, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares to be issued	21,250,000
Number of shares available for future grants	1,262,031
Stock-based compensation expense recognized	$11	$9
Unrecognized compensation costs related to non-vested stocks	$62
Weighted average period for recognizing non-vested stock based compensation costs	1 year 2 months
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plans, award vesting period	3 years
Shares - Stock Options	1,067,190	0
Share-based compensation plans, award term	10 years
Restricted Stock Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plans, award vesting period		3 years
Shares - Other than Stock Options	765,750	0
Total Shareholder Return (TSR) Performance Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plans, award vesting period	3 years
Shares - Other than Stock Options	273,560	279,570
Total Shareholder Return (TSR) Performance Awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting of performance awards as percentage to target award	0.00%
Total Shareholder Return (TSR) Performance Awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting of performance awards as percentage to target award	200.00%
Return On Capital Employed (ROCE) Performance Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation plans, award vesting period	3 years
Performance Period Weighting Year 1	20.00%
Performance Period Weighting Year 2	30.00%
Performance Period Weighting Year 3	50.00%
Shares - Other than Stock Options	0	259,280
Return On Capital Employed (ROCE) Performance Awards | Threshold
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting of performance awards as percentage to target award	50.00%
Return On Capital Employed (ROCE) Performance Awards | Target
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting of performance awards as percentage to target award	100.00%
Return On Capital Employed (ROCE) Performance Awards | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting of performance awards as percentage to target award	0.00%
Return On Capital Employed (ROCE) Performance Awards | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting of performance awards as percentage to target award	200.00%

Income_Taxes_Additional_Inform

Income Taxes - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Income Taxes [Line Items]
Income tax benefit	($174)	$1
(Loss) income before income taxes	-249	53
Net benefit included in tax provision relating to the adjustment of certain tax reserves	31
Unrecognized tax benefits	83		112
Total amount of unrecognized tax benefits that, if recognized, would affect effective tax rate	24		59
Accrued liabilities, interest on unrecognized tax benefits	2		7
Domestic Country
Income Taxes [Line Items]
Net deferred tax asset	557		318
Foreign Country
Income Taxes [Line Items]
Net deferred tax asset	14		29
Deferred tax asset, valuation allowance	$5		$5

Earnings_and_Dividends_Per_Com1

Earnings and Dividends Per Common Share - Computations for Basic and Diluted Income (Loss) Per Common Share from Continuing Operations (Detail) (USD $)	3 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Net (loss) earnings attributable to United States Steel Corporation stockholders	($75)	$52
Plus earnings effect of assumed conversion-interest on convertible notes	0	2
Net (loss) earnings after assumed conversion	($75)	$54
Weighted-average shares outstanding:
Basic	145,733	144,757
Effect of convertible notes	0	10,058
Effect of stock options, restricted stock units and performance awards	0	1,299
Adjusted weighted-average shares outstanding, diluted	145,733	156,114
Basic earnings per common share	($0.52)	$0.36
Diluted earnings per common share	($0.52)	$0.34

Earnings_and_Dividends_Per_Com2

Earnings and Dividends Per Common Share - Antidilutive Securities that were Not Included in Computations of Diluted Income (Loss) Per Common Share (Detail) (Securities granted under the 2005 Stock Incentive Plan)	3 Months Ended
In Thousands, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Securities granted under the 2005 Stock Incentive Plan
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities	10,056	2,336

Earnings_and_Dividends_Per_Com3

Earnings and Dividends Per Common Share - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Earnings Per Share [Abstract]
Quarterly dividend per common share	$0.05	$0.05

Inventories_Inventory_Disclosu

Inventories - Inventory Disclosure (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Inventory Disclosure [Abstract]
Raw materials	$864	$801
Semi-finished products	982	1,053
Finished products	502	563
Supplies and sundry items	70	79
Total	$2,418	$2,496

Inventories_Additional_Informa

Inventories - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Inventory Disclosure [Abstract]
Percent of Last-in, First-out (LIFO) inventory to total inventory values	81.00%		78.00%
Estimate in excess of current acquisition costs over stated inventory values	$875		$1,000
Cost of sales increase/reduction, liquidations of LIFO inventories	4	9
Land held for residential or commercial development	$66		$69

Derivative_Instruments_Locatio

Derivative Instruments - Location and Amounts of Fair Values Related to Derivatives in Financial Statements (Detail) (Foreign exchange forward contracts, USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Accounts receivable
Derivative [Line Items]
Derivative Asset, fair value, gross asset	$49	$31
Accounts payable
Derivative [Line Items]
Derivative Liability, fair value, gross liability	$1	$0

Derivative_Instruments_Locatio1

Derivative Instruments - Location and Amounts of Gains or Losses Related to Derivatives in Financial Statements (Detail) (Foreign exchange forward contracts, Other financial costs, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Foreign exchange forward contracts | Other financial costs
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain (Loss)	$43	$0

Derivative_Instruments_Additio

Derivative Instruments - Additional Information (Detail) (Foreign exchange forward contracts, USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Derivative [Line Items]
Euro forward sales contracts notional value	316
Maximum
Derivative [Line Items]
Derivative, Term of Contract	12 months	12 months

Debt_Schedule_of_Debt_Detail

Debt - Schedule of Debt (Detail) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Debt Instrument [Line Items]
Debt and capital lease obligation	$3,544,000,000		$3,543,000,000
Less unamortized discount	42,000,000		45,000,000
Less short-term debt and long-term debt due within one year(a)	378,000,000		378,000,000
Long-term debt	3,124,000,000		3,120,000,000
2037 Senior Notes
Debt Instrument [Line Items]
Interest rate	6.65%
Debt instrument, maturity date	2037
Debt and capital lease obligation	350,000,000		350,000,000
2022 Senior Notes
Debt Instrument [Line Items]
Interest rate	7.50%
Debt instrument, maturity date	2022
Debt and capital lease obligation	400,000,000		400,000,000
2021 Senior Notes
Debt Instrument [Line Items]
Interest rate	6.88%
Debt instrument, maturity date	2021
Debt and capital lease obligation	275,000,000		275,000,000
2020 Senior Notes
Debt Instrument [Line Items]
Interest rate	7.38%
Debt instrument, maturity date	2020
Debt and capital lease obligation	600,000,000		600,000,000
2018 Senior Notes
Debt Instrument [Line Items]
Interest rate	7.00%
Debt instrument, maturity date	2018
Debt and capital lease obligation	500,000,000		500,000,000
2017 Senior Notes
Debt Instrument [Line Items]
Interest rate	6.05%
Debt instrument, maturity date	2017
Debt and capital lease obligation	450,000,000		450,000,000
2019 Senior Convertible Notes(a)
Debt Instrument [Line Items]
Interest rate	2.75%
Debt instrument, maturity date	2019
Debt and capital lease obligation	316,000,000		316,000,000
Environmental Revenue Bonds
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Minimum	5.38%
Debt Instrument, Interest Rate, Stated Percentage Rate Range, Maximum	6.88%
Debt and capital lease obligation	549,000,000		549,000,000
Environmental Revenue Bonds | Minimum
Debt Instrument [Line Items]
Debt instrument, maturity date	2015
Environmental Revenue Bonds | Maximum
Debt Instrument [Line Items]
Debt instrument, maturity date	2042
Recovery Zone Facility Bonds
Debt Instrument [Line Items]
Interest rate	6.75%
Debt instrument, maturity date	2040
Debt and capital lease obligation	70,000,000		70,000,000
Fairfield Caster Lease
Debt Instrument [Line Items]
Debt instrument, maturity date	2022
Debt and capital lease obligation	33,000,000		33,000,000
Other capital leases and all other obligations
Debt Instrument [Line Items]
Debt instrument, maturity date	2019
Debt and capital lease obligation	1,000,000		0
Amended Credit Agreement
Debt Instrument [Line Items]
Interest rate description	Variable
Debt instrument, maturity date	2016
Debt and capital lease obligation	0		0
USSK Revolver
Debt Instrument [Line Items]
Interest rate description	Variable
Debt instrument, maturity date	2016
Debt and capital lease obligation	0		0
USSK credit facilities
Debt Instrument [Line Items]
Interest rate description	Variable
Debt and capital lease obligation	0		0
USSK credit facilities | Minimum
Debt Instrument [Line Items]
Debt instrument, maturity date	2015
USSK credit facilities | Maximum
Debt Instrument [Line Items]
Debt instrument, maturity date	2016
Receivable Purchase Agreement [Member]
Debt Instrument [Line Items]
Amount reinvested from collection of eligible accounts receivable	$0	$0

Debt_Eligible_Accounts_Receiva

Debt - Eligible Accounts Receivable and Receivables Sold to Third Party Conduits (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Debt Disclosure [Abstract]
Balance of accounts receivable-net, eligible for sale to third-parties	$782	$1,013
Accounts receivable sold to third-parties	0	0
Balance included in Receivables on the balance sheet of U. S. Steel	$782	$1,013

Additional_Information_Detail

- Additional Information (Detail)

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2014

Dec. 31, 2014

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

2019 Senior Convertible Notes(a)

Amended Credit Agreement

Amended Credit Agreement

Receivable Purchase Agreement

Receivable Purchase Agreement

Receivable Purchase Agreement

USSK Revolver

USSK Revolver

USSK credit facilities

USSK credit facilities

Us Steel Kosice Ten Million Credit Facility

Change in control event

Fairfield Slab Caster

USD ($)

Covenant Requirement

USD ($)

USD ($)

USD ($)

USD ($)

EUR (€)

USD ($)

EUR (€)

EUR (€)

USD ($)

USD ($)

USD ($)

Debt Instrument [Line Items]

Interest rate

2.75%

Amounts drawn on credit facility

$0

$0

$0

Maximum borrowing capacity on credit facility

875,000,000

215,000,000

200,000,000

31,000,000

20,000,000

10,000,000

Fixed charge coverage ratio

1

Percentage of total aggregate commitments, upper range under financial covenant

10.00%

Credit Agreement, upper range of outstanding debt

87,500,000

Receivables Purchase Agreement, maximum amount of receivable eligible for sale

502,000,000

625,000,000

Receivables sold under receivables purchase agreement

0

0

Receivables Purchase Agreement Subordinated Retained Interest

502,000,000

625,000,000

Receivables Purchase Agreement Availability at Period End

452,000,000

576,000,000

Receivables Purchase Agreement Borrowing Capacity Decrease Due To Letters Of Credit Outstanding

50,000,000

49,000,000

Payments For Fees Related To Receivable Purchase Agreement

1,000,000

1,000,000

Amount reinvested from collection of eligible accounts receivable

0

0

Available borrowing capacity

30,000,000

Customs and other guarantees outstanding

1,000,000

Loss Contingency, Range of Possible Loss, Maximum

$2,891,000,000

$36,000,000

Asset_Retirement_Obligations_C

Asset Retirement Obligations - Changes in Carrying Values of Asset Retirement Obligations (Detail) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2013
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Balance at beginning of year	$48
Additional obligations incurred	44	6
Obligations settled	0	-19
Foreign currency translation effects	-1	-2
Accretion expense	1	4
Balance at end of period	$92	$59

Fair_Value_of_Financial_Instru2

Fair Value of Financial Instruments - Financial Assets and Liabilities Not Carried at Fair Value (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Fair Value
Financial liabilities:
Debt	$3,648	$3,740
Carrying Amount
Financial liabilities:
Debt	$3,469	$3,466

Statement_of_Changes_in_Stockh2

Statement of Changes in Stockholders' Equity (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$3,800	$3,376
Comprehensive income (loss):
Net (loss) earnings	-75	52
Other comprehensive (loss) income, net of tax:
Pension and other benefit adjustments	43	50
Currency translation adjustment	-103	-2
Employee stock plans	11	9
Dividends paid on common stock	-7	-7
Other	-1
Ending balance	3,668	3,478
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,862	1,789
Comprehensive income (loss):
Net (loss) earnings	-75	52
Other comprehensive (loss) income, net of tax:
Dividends paid on common stock	-7	-7
Other	-1
Ending balance	1,779	1,834
Accumulated Other Comprehensive (Loss) Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	-1,441	-1,752
Other comprehensive (loss) income, net of tax:
Pension and other benefit adjustments	43	50
Currency translation adjustment	-103	-2
Ending balance	-1,501	-1,704
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			151	151
Other comprehensive (loss) income, net of tax:
Ending balance	151	151	151	151
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	-396	-480
Other comprehensive (loss) income, net of tax:
Employee stock plans	1	1
Other
Ending balance	-395	-479
Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	3,623	3,667
Other comprehensive (loss) income, net of tax:
Employee stock plans	10	8
Ending balance	3,633	3,675
Non- Controlling Interest
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance			1	1
Other comprehensive (loss) income, net of tax:
Ending balance	$1	$1	$1	$1

Reclassifications_from_Accumul2

Reclassifications from Accumulated Other Comprehensive Income (AOCI) - Other Comprehensive Income Activity Net of Tax (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	($1,441)
Other comprehensive (loss) income before reclassifications	-109
Amounts reclassified from AOCI	49
Total other comprehensive (loss) income, net of tax	-60	48
Ending Balance	-1,501
Pension and Other Benefit Items
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	-1,852
Other comprehensive (loss) income before reclassifications	-1
Amounts reclassified from AOCI	44
Total other comprehensive (loss) income, net of tax	43
Ending Balance	-1,809
Foreign Currency Items
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	416
Other comprehensive (loss) income before reclassifications	-103
Amounts reclassified from AOCI	0
Total other comprehensive (loss) income, net of tax	-103
Ending Balance	313
Other
Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	-5
Other comprehensive (loss) income before reclassifications	-5
Amounts reclassified from AOCI	5
Total other comprehensive (loss) income, net of tax	0
Ending Balance	($5)

Reclassifications_from_Accumul3

Reclassifications from Accumulated Other Comprehensive Income (AOCI) - Defined Benefit Plan In Other Comprehensive Income (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Amortization of pension and other benefit items
(Loss) earnings before income taxes	($249)	$53
Tax benefit	174	-1
Net (loss) earnings	-75	52
Pension and Other Benefit Items | Amount reclassified from AOCI
Amortization of pension and other benefit items
Prior service costs	-2	-10
Actuarial gains/(losses)	-66	-69
Settlement, termination and curtailment gains	-3	0
(Loss) earnings before income taxes	-71	-79
Tax benefit	27	28
Net (loss) earnings	($44)	($51)

Transactions_with_Related_Part1

Transactions with Related Parties - Additional Information (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014
Related Party Transaction [Line Items]
Net sales to related parties	$326	$279
Accounts payable to related parties	135		131
Outside processing services
Related Party Transaction [Line Items]
Purchases from related parties	101	15
Taconite pellets
Related Party Transaction [Line Items]
Purchases from related parties	30	54
PRO-TEC Coating Company
Related Party Transaction [Line Items]
Accounts payable to related parties	86		78
Other equity investees
Related Party Transaction [Line Items]
Accounts payable to related parties	$49		$53

Restructuring_and_Other_Charge2

Restructuring and Other Charges - Activity in Accrued Balances for Restructuring and Other Cost Reduction Programs (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Restructuring Reserve [Roll Forward]
Balance at beginning of period	$5
Additional charges	153
Cash payments/utilization	-90
Other adjustments and reclassifications	0	8
Balance at end of period	68
Employee Related Costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period	5
Additional charges	18
Cash payments/utilization	0
Other adjustments and reclassifications	0
Balance at end of period	23
Exit Costs
Restructuring Reserve [Roll Forward]
Balance at beginning of period	0
Additional charges	45
Cash payments/utilization	0
Other adjustments and reclassifications	0
Balance at end of period	45
Asset Impairments
Restructuring Reserve [Roll Forward]
Balance at beginning of period	0
Additional charges	90
Cash payments/utilization	-90
Other adjustments and reclassifications	0
Balance at end of period	$0

Restructuring_and_Other_Charge3

Restructuring and Other Charges - Balance Sheet Location of Accrued Liabilities for Restructuring and Other Cost Reduction Programs (Details) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Restructuring Cost and Reserve [Line Items]
Total	$68	$5
Accounts payable
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, current	28	0
Payroll and benefits payable
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, current	23	5
Deferred credits and other noncurrent liabilities
Restructuring Cost and Reserve [Line Items]
Restructuring reserve, noncurrent	$17	$0

Restructuring_and_Other_Charge4

Restructuring and Other Charges - Additional Information (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015	Mar. 31, 2014
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$153
Cash payments related to restructuring		4
Adjustments to restructuring reserves	0	8
Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	153
Severance Costs	18
Us Steel Canada Inc | Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Severance Costs		$2

Contingencies_and_Commitments_2

Contingencies and Commitments - Asbestos Litigation Activity (Details) (Asbestos Matters)	3 Months Ended	12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
	Claim_Group	Claim_Group	Claim_Group	Claim_Group
	LegalMatter
Asbestos Matters
Loss Contingency Accrual [Roll Forward]
Opening Number of Claims	3,455	3,320	3,330	3,235
New Claims	75	325	240	285
Claims Dismissed, Settled and Resolved	110	190	250	190
Closing Number of Claims	2,540	3,455	3,320	3,330

Contingencies_and_Commitments_3

Contingencies and Commitments - Changes in Accrued Liabilities for Remediation Activities (Detail) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2015
Change in Accrued Liabilities for Remediation Activities [Roll Forward]
Beginning of period	$212
Accruals for environmental remediation deemed probable and reasonably estimable	0
Obligations settled	-2
End of period	$210

Contingencies_and_Commitments_4

Contingencies and Commitments - Accrued Liabilities for Remediation Activities Included in Balance Sheet (Detail) (USD $)	Mar. 31, 2015	Dec. 31, 2014
In Millions, unless otherwise specified
Loss Contingencies [Line Items]
Total	$210	$212
Accounts payable
Loss Contingencies [Line Items]
Total	19	19
Deferred credits and other noncurrent liabilities
Loss Contingencies [Line Items]
Total	$191	$193

Contingencies_and_Commitments_5

Contingencies and Commitments - Payments for Contracts with Remaining Terms in Excess of One Year (Detail) (USD $)	Mar. 31, 2015
In Millions, unless otherwise specified
Commitments and Contingencies Disclosure [Abstract]
Remainder of 2015	$588
2016	704
2017	558
2018	539
2019	286
Later Years	923
Total	$3,598

Contingencies_and_Commitments_6

Contingencies and Commitments - Additional Information (Detail)

0 Months Ended

1 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

12 Months Ended

3 Months Ended

Aug. 02, 2012

Jan. 30, 2014

Mar. 31, 2015

Mar. 31, 2014

Dec. 31, 2013

Dec. 31, 2014

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Dec. 31, 2013

Dec. 31, 2012

Dec. 31, 2011

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Mar. 31, 2015

Facility

Allowances

USD ($)

USD ($)

boiler

USD ($)

Gateway Energy and Coke Company, LLC

Minimum

Minimum

Maximum

Maximum

Asbestos Matters

Asbestos Matters

Asbestos Matters

Asbestos Matters

Asbestos Matters

Asbestos Matters

Asbestos Matters

Projects with Ongoing Study and Scope Development

Projects with Ongoing Study and Scope Development

Projects with Ongoing Study and Scope Development

Projects with Ongoing Study and Scope Development

Projects with Ongoing Study and Scope Development

Projects with Defined Scope Greater Than or Equal to $5 Million

Projects with Defined Scope Greater Than or Equal to $5 Million

Gary Works, Project with Defined Scope

Geneva Project

St Louis Estuary Project

Solid Waste Management Unit at USS Posco Industries, Project with Defined Scope

Environmental Remediation Other Projects

Environmental Remediation Other Projects

Environmental Remediation Other Projects

Environmental Remediation Projects Less Than One Million

Environmental Remediation Projects Less Than One Million

Surety Bonds

Restricted Cash To Fund Certain Capital Projects

boiler

USD ($)

EUR (€)

USD ($)

EUR (€)

Plaintiff

Claim_Group

Claim_Group

Plaintiff

Claim_Group

Claim_Group

Claim_Group

USD ($)

Resource Conservation and Recovery Act (RCRA) Programs

Voluntary Remediation Program

Minimum

Maximum

USD ($)

Minimum

USD ($)

USD ($)

USD ($)

USD ($)

USD ($)

Minimum

Maximum

USD ($)

Maximum

USD ($)

USD ($)

phase

level

level

level

level

LegalMatter

LegalMatter

LegalMatter

LegalMatter

Project

Project

Project

USD ($)

USD ($)

Project

USD ($)

Project

USD ($)

USD ($)

USD ($)

T

Claim_Group

Claim_Group

non_GHG_pollutant

Loss Contingencies [Line Items]

Active cases brought against U.S. Steel

900

900

880

Number of plaintiffs involved

3,420

3,420

3,455

3,455

Number of claims pending in jurisdictions

3,420

3,420

3,455

3,320

3,320

3,330

3,235

Percentage of claims pending in jurisdictions

74.00%

74.00%

Claims Dismissed, Settled and Resolved

110

110

190

190

250

190

New Claims

75

75

325

325

240

285

Number of major groups

3

3

Projected percentage remediation costs may exceed accrued liabilities

10.00%

10.00%

25.00%

25.00%

Environmental remediation projects

5

4

1

4

4

Accrued liabilities for remediation activities

$210,000,000

$212,000,000

$2,000,000

$159,000,000

$5,000,000

$38,000,000

$64,000,000

$50,000,000

$7,000,000

$8,000,000

$1,000,000

$5,000,000

$6,000,000

$1,000,000

Environment exit costs, possible additional loss

25,000,000

40,000,000

Accrued liabilities for post-closure site monitoring and other costs

28,000,000

Accrued liability for administrative and legal costs

7,000,000

Number of years of projected administrative and legal costs included in accrual

3 years

Capital expenditures

23,000,000

11,000,000

Overall Goal for Reduction in Emissions, Percent

21.00%

Percent reduction in free allocation of emissions

12.00%

Final Allocation for Emissions Allowances

48,000,000

Estimated Shortfall in Emissions Allowances

16,000,000

Gain (Loss) on Disposition of Other Assets

0

17,000,000

Minimum annual increment in GHG emission due to modifications to existing permits subject to Title V and PSD requirement if only project significantly increases emissions of at least one non-GHG pollutant

75,000

Threshold for Subject To Title V And Prevention of Significant Deterioration Requirement, Project Significantly Increases Emissions, Number of Non-GHG Pollutant

1

National Ambient Air Quality Standards level

65

65

70

70

Estimated capital expenditures of complying with BAT over 2014 to 2016 period

86,000,000

80,000,000

167,000,000

155,000,000

Number of Boilers to be Reconstructed for Environmental Compliance

1

Number of New Boilers to be Built for Environmental Compliance

1

Estimated Capital Expenditures For Project, Boiler

170,000,000

Financial assurance guarantees, maximum

4,000,000

165,000,000

Number of facilities that failed to meet certain environmental requirements

3

Loss Contingency, Fact Discovery, Number of Phases

3

Claims Against U. S. Steel Canada

1,800,000,000

Residual value of equipment

12,000,000

Restricted cash

48,000,000

51,000,000

4,000,000

Restricted cash current

1,000,000

1,000,000

Contract commitments to acquire property, plant and equipment

352,000,000

Long-term Purchase Commitment, Period

2 years

2 years

13 years

13 years

Unrecorded Unconditional Purchase Obligation, Minimum Quantity

0.9

Unrecorded Unconditional Purchase Obligation, Maximum Quantity

1.05

Maximum default payment on termination of agreement

232,000,000

Unrecorded Unconditional Purchase Obligation, Purchases

$111,000,000

$134,000,000