Union Pacific (UNP) 10-Q 17 Apr 14 2014 Q1 Quarterly report Financial data

Document_and_Entity_Informatio

Document and Entity Information	3 Months Ended
	Mar. 31, 2014	Apr. 11, 2014
Document and Entity Information [Abstract]	'	'
Document type	'10-Q	'
Document period end date	31-Mar-14	'
Amendment flag	'false	'
Entity registrant name	'UNION PACIFIC CORPORATION	'
Entity central index key	'0000100885	'
Entity current reporting status	'Yes	'
Entity voluntary filers	'No	'
Current fiscal year end date	'--12-31	'
Entity filer category	'Large Accelerated Filer	'
Entity well known seasoned issuer	'Yes	'
Entity common stock shares outstanding	'	452,911,741
Document fiscal year focus	'2014	'
Document fiscal period focus	'Q1	'

Condensed_Consolidated_Stateme

Condensed Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating revenues [Abstract]	'	'
Freight revenues	$5,286	$4,984
Other revenues	352	306
Total operating revenues	5,638	5,290
Operating expenses [Abstract]	'	'
Compensation and benefits	1,254	1,216
Fuel	921	900
Purchased services and materials	607	557
Depreciation	464	434
Equipment and other rents	312	313
Other	226	237
Total operating expenses	3,784	3,657
Operating income	1,854	1,633
Other income (Note 5)	38	40
Interest expense	-133	-128
Income before income taxes	1,759	1,545
Income taxes	-671	-588
Net income	$1,088	$957
Share and Per Share (Note 7) [Abstract]	'	'
Earnings per share - basic	$2.40	$2.05
Earnings per share - diluted	$2.38	$2.03
Weighted average number of shares - basic	454.1	467.8
Weighted average number of shares - diluted	456.2	470.5
Dividends declared per share	$0.91	$0.69

Condensed_Consolidated_Stateme1

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Condensed Consolidated Statements of Comprehensive Income (Unaudited) [Abstract]	'		'
Net income	$1,088		$957
Other comprehensive income/(loss):	'		'
Defined benefit plans	20		14
Foreign currency translation	-4		3
Total other comprehensive income/(loss)	16	[1]	17	[1]
Comprehensive income	$1,104		$974
[1]	Net of deferred taxes of $5 million and $12 million during the three months ended March 31, 2014, and 2013, respectively.

Condensed_Consolidated_Stateme2

Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parentheticals) [Abstract]	'	'
Deferred taxes activity other comprehensive income/(loss)	$5	$12

Condensed_Consolidated_Stateme3

Condensed Consolidated Statements of Financial Position (Unaudited) (USD $)	Mar. 31, 2014	Dec. 31, 2013
In Millions, unless otherwise specified
Current assets [Abstract]	'	'
Cash and cash equivalents	$1,857	$1,432
Accounts receivable, net (Note 9)	1,542	1,414
Materials and supplies	705	653
Current deferred income taxes	259	268
Other current assets	316	223
Total current assets	4,679	3,990
Investments	1,344	1,321
Net properties (Note 10)	44,189	43,749
Other assets	686	671
Total assets	50,898	49,731
Current liabilities [Abstract]	'	'
Accounts payable and other current liabilities (Note 11)	3,556	3,086
Debt due within one year (Note 13)	632	705
Total current liabilities	4,188	3,791
Debt due after one year (Note 13)	9,544	8,872
Deferred income taxes	14,229	14,163
Other long-term liabilities	1,665	1,680
Commitments and contingencies (Note 15)	'	'
Total liabilities	29,626	28,506
Common shareholders' equity [Abstract]	'	'
Common shares, $2.50 par value, 800,000,000 authorized; 555,066,436 and 554,828,826 issued; 453,006,906 and 456,000,998 outstanding, respectively	1,388	1,387
Paid-in-surplus	4,233	4,210
Retained earnings	25,962	25,288
Treasury stock	-9,577	-8,910
Accumulated other comprehensive loss (Note 8)	-734	-750
Total common shareholders' equity	21,272	21,225
Total liabilities and common shareholders' equity	$50,898	$49,731

Condensed_Consolidated_Stateme4

Condensed Consolidated Statements of Financial Position (Unaudited) (Parentheticals) (USD $)	Mar. 31, 2014	Dec. 31, 2013
Condensed Consolidated Statements of Financial Position (Unaudited) (Parentheticals) [Abstract]	'	'
Common shares, par value	$2.50	$2.50
Common shares authorized	800,000,000	800,000,000
Common shares issued	555,066,436	554,828,826
Common shares outstanding	453,006,906	456,000,998

Condensed_Consolidated_Stateme5

Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Operating Activities [Abstract]	'	'
Net income	$1,088	$957
Adjustments to reconcile net income to cash provided by operating activities [Abstract]	'	'
Depreciation	464	434
Deferred income taxes and unrecognized tax benefits	75	184
Other operating activities, net	-57	4
Changes in current assets and liabilities [Abstract]	'	'
Accounts receivable, net	-128	-181
Materials and supplies	-52	5
Other current assets	-93	-14
Accounts payable and other current liabilities	84	-82
Income and other taxes payable	386	217
Cash provided by operating activities	1,767	1,524
Investing Activities [Abstract]	'	'
Capital investments	-893	-782
Proceeds from asset sales	27	17
Other investing activities, net	-39	-35
Cash used in investing activities	-905	-800
Financing Activities [Abstract]	'	'
Debt issued (Note 13)	995	944
Common share repurchases (Note 16)	-644	-374
Debt repaid	-402	-83
Dividends paid	-363	-323
Other financing activities, net	-23	-34
Cash (used in)/provided by financing activities	-437	130
Net change in cash and cash equivalents	425	854
Cash and cash equivalents at beginning of year	1,432	1,063
Cash and cash equivalents at end of period	1,857	1,917
Non-cash investing and financing activities [Abstract]	'	'
Cash dividends declared but not yet paid	407	318
Capital investments accrued but not yet paid	109	107
Common shares repurchased but not yet paid	39	20
Cash paid for: [Abstract]	'	'
Income taxes, net of refunds	-146	-39
Interest, net of amounts capitalized	($178)	($179)

Condensed_Consolidated_Stateme6

Condensed Consolidated Statements of Changes in Common Shareholders' Equity (Unaudited) (USD $)		Total	Common Shares (Units) [Member]	Treasury Shares (Units) [Member]	Common Shares [Member]	Paid-in-Surplus [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income/(Loss) (Note 8) [Member]
In Millions, except Share data, unless otherwise specified		USD ($)			USD ($)	USD ($)	USD ($)	USD ($)	USD ($)
Shareholders' equity, beginning balance at Dec. 31, 2012		$19,877	'	'	$1,386	$4,113	$22,271	($6,707)	($1,186)
Common shares, beginning balance at Dec. 31, 2012		'	554,600,000	-85,100,000	'	'	'	'	'
Comprehensive income [Abstract]		'	'	'	'	'	'	'	'
Net income		957	'	'	'	'	957	'	'
Other comp. income	[1]	17	'	'	'	'	'	'	17
Conversion, stock option exercises, forfeitures, and other		10	'	'	1	21	'	-12	'
Conversion, stock option exercises, forfeitures, and other (shares)		'	200,000	300,000	'	'	'	'	'
Share repurchases (Note 16)		-394	'	'	'	'	'	-394	'
Share repurchases (Note 16) (Shares)		-2,881,400	'	-2,900,000	'	'	'	'	'
Cash dividends declared		-323	'	'	'	'	-323	'	'
Shareholders' equity, ending balance at Mar. 31, 2013		20,144	'	'	1,387	4,134	22,905	-7,113	-1,169
Common shares, ending balance at Mar. 31, 2013		'	554,800,000	-87,700,000	'	'	'	'	'
Shareholders' equity, beginning balance at Dec. 31, 2013		21,225	'	'	1,387	4,210	25,288	-8,910	-750
Common shares, beginning balance at Dec. 31, 2013		456,000,998	554,800,000	-98,800,000	'	'	'	'	'
Comprehensive income [Abstract]		'	'	'	'	'	'	'	'
Net income		1,088	'	'	'	'	1,088	'	'
Other comp. income	[1]	16	'	'	'	'	'	'	16
Conversion, stock option exercises, forfeitures, and other		40	'	'	1	23	'	16	'
Conversion, stock option exercises, forfeitures, and other (shares)		'	300,000	500,000	'	'	'	'	'
Share repurchases (Note 16)		-683	'	'	'	'	'	-683	'
Share repurchases (Note 16) (Shares)		-3,820,000	'	-3,800,000	'	'	'	'	'
Cash dividends declared		-414	'	'	'	'	-414	'	'
Shareholders' equity, ending balance at Mar. 31, 2014		$21,272	'	'	$1,388	$4,233	$25,962	($9,577)	($734)
Common shares, ending balance at Mar. 31, 2014		453,006,906	555,100,000	-102,100,000	'	'	'	'	'
[1]	Net of deferred taxes of $5 million and $12 million during the three months ended March 31, 2014, and 2013, respectively.

Condensed_Consolidated_Stateme7

Condensed Consolidated Statements of Changes in Common Shareholders' Equity (Unaudited) (Parentheticals) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Cash Dividends [Abstract]	'	'
Cash dividends declared per share	$0.91	$0.69

Basis_Of_Presentation

Basis Of Presentation	3 Months Ended
	Mar. 31, 2014
Basis of Presentation [Abstract]	'
Basis of Presentation [Text Block]	'
	For purposes of this report, unless the context otherwise requires, all references herein to the “Corporation”, “Company”, “UPC”, “we”, “us”, and “our” mean Union Pacific Corporation and its subsidiaries, including Union Pacific Railroad Company, which will be separately referred to herein as “UPRR” or the “Railroad”.
	1. Basis of Presentation
	Our Condensed Consolidated Financial Statements are unaudited and reflect all adjustments (consisting of normal and recurring adjustments) that are, in the opinion of management, necessary for their fair presentation in conformity with accounting principles generally accepted in the United States of America (GAAP). Our Consolidated Statement of Financial Position at December 31, 2013, is derived from audited financial statements. This Quarterly Report on Form 10-Q should be read in conjunction with our Consolidated Financial Statements and notes thereto contained in our 2013 Annual Report on Form 10-K. The results of operations for the three months ended March 31, 2014, are not necessarily indicative of the results for the entire year ending December 31, 2014.
	The Condensed Consolidated Financial Statements are presented in accordance with GAAP as codified in the Financial Accounting Standards Board (FASB) Accounting Standards Codification (ASC). Certain prior period amounts have been disaggregated to provide more detail and conform to the current period financial statement presentation.

Operations_And_Segmentation

Operations And Segmentation	3 Months Ended
	Mar. 31, 2014
Operations and Segmentation [Abstract]	'
Operations and Segmentation [Text Block]	'
	2. Operations and Segmentation
	The Railroad, along with its subsidiaries and rail affiliates, is our one reportable operating segment. Although we provide and analyze revenue by commodity group, we treat the financial results of the Railroad as one segment due to the integrated nature of our rail network. The following table provides freight revenue by commodity group:
	Millions,
	for the Three Months Ended March 31,		2014		2013
	Agricultural	$	910	$	784
	Automotive		488		487
	Chemicals		893		873
	Coal		961		936
	Industrial Products		1,011		916
	Intermodal		1,023		988
	Total freight revenues	$	5,286	$	4,984
	Other revenues		352		306
	Total operating revenues	$	5,638	$	5,290
	Although our revenues are principally derived from customers domiciled in the U.S., the ultimate points of origination or destination for some products transported by us are outside the U.S. Each of our commodity groups includes revenue from shipments to and from Mexico. Included in the above table are revenues from our Mexico business which amounted to $540 million and $505 million, respectively for the three months ended March 31, 2014, and March 31, 2013.

StockBased_Compensation

Stock-Based Compensation	3 Months Ended
	Mar. 31, 2014
Stock-Based Compensation [Abstract]	'
Stock-Based Compensation [Text Block]	'
	3. Stock-Based Compensation
	We have several stock-based compensation plans under which employees and non-employee directors receive stock options, nonvested retention shares, and nonvested stock units. We refer to the nonvested shares and stock units collectively as “retention awards”. We have elected to issue treasury shares to cover option exercises and stock unit vestings, while new shares are issued when retention shares are granted. Information regarding stock-based compensation appears in the table below:
	Millions,
	for the Three Months Ended March 31,	2014		2013
	Stock-based compensation, before tax:
	Stock options	$	6	$	4
	Retention awards		29		21
	Total stock-based compensation, before tax	$	35	$	25
	Excess tax benefits from equity compensation plans	$	60	$	46
	Stock Options – We estimate the fair value of our stock option awards using the Black-Scholes option pricing model. The table below shows the annual weighted-average assumptions used for valuation purposes:
	Weighted-Average Assumptions		2014		2013
	Risk-free interest rate		1.60%		0.80%
	Dividend yield		2.10%		2.10%
	Expected life (years)		5.2		5
	Volatility		30.00%		36.20%
	Weighted-average grant-date fair value of options granted	$	40.35	$	34.98
	The risk-free rate is based on the U.S. Treasury yield curve in effect at the time of grant; the dividend yield is calculated as the ratio of dividends paid per share of common stock to the stock price on the date of grant; the expected life is based on historical and expected exercise behavior; and volatility is based on the historical volatility of our stock price over the expected life of the option.
	A summary of stock option activity during the three months ended March 31, 2014, is presented below:
		Options (thous.)	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value (millions)
	Outstanding at January 1, 2014	3,722	$	80.14	5.8 yrs.	$	327
	Granted	494		175.12	N/A		N/A
	Exercised	-308		70.47	N/A		N/A
	Forfeited or expired	-2		126.11	N/A		N/A
	Outstanding at March 31, 2014	3,906	$	92.89	6	$	370
	Vested or expected to vest at March 31, 2014	3,874	$	92.41	6	$	369
	Options exercisable at March 31, 2014	2,842	$	71.88	4.9	$	329
	Stock options are granted at the closing price on the date of grant, have ten-year contractual terms, and vest no later than three years from the date of grant. None of the stock options outstanding at March 31, 2014, are subject to performance or market-based vesting conditions.
	At March 31, 2014, there was $29 million of unrecognized compensation expense related to nonvested stock options, which is expected to be recognized over a weighted-average period of 1.8 years. Additional information regarding stock option exercises appears in the table below:
	Millions,
	for the Three Months Ended March 31,	2014		2013
	Intrinsic value of stock options exercised	$	34	$	28
	Cash received from option exercises		18		14
	Treasury shares repurchased for employee payroll taxes		-7		-5
	Tax benefit realized from option exercises		13		11
	Aggregate grant-date fair value of stock options vested		17		16
	Retention Awards – The fair value of retention awards is based on the closing price of the stock on the grant date. Dividends and dividend equivalents are paid to participants during the vesting periods.
	Changes in our retention awards during the three months ended March 31, 2014, were as follows:
		Shares (thous.)	Weighted-Average Grant-Date Fair Value
	Nonvested at January 1, 2014	1,856	$	98.04
	Granted	411		175.12
	Vested	-532		62.13
	Forfeited	-10		108.69
	Nonvested at March 31, 2014	1,725	$	127.42
	Retention awards are granted at no cost to the employee or non-employee director and vest over periods lasting up to four years. At March 31, 2014, there was $124 million of total unrecognized compensation expense related to nonvested retention awards, which is expected to be recognized over a weighted-average period of 2.3 years.
	Performance Retention Awards – In February 2014, our Board of Directors approved performance stock unit grants. Other than different performance targets, the basic terms of these performance stock units are identical to those granted in February 2012, and February 2013, including using annual return on invested capital (ROIC) as the performance measure. We define ROIC as net operating profit adjusted for interest expense (including interest on the present value of operating leases) and taxes on interest divided by average invested capital adjusted for the present value of operating leases.
	Stock units awarded to selected employees under these grants are subject to continued employment for 37 months and the attainment of certain levels of ROIC. We expense the fair value of the units that are probable of being earned based on our forecasted ROIC over the 3-year performance period. We measure the fair value of these performance stock units based upon the closing price of the underlying common stock as of the date of grant, reduced by the present value of estimated future dividends. Dividend equivalents are paid to participants only after the units are earned.
	The assumptions used to calculate the present value of estimated future dividends related to the February 2014, grant were as follows:
		2014
	Dividend per share per quarter	$	0.91
	Risk-free interest rate at date of grant		0.70%
	Changes in our performance retention awards during the three months ended March 31, 2014, were as follows:
		Shares (thous.)	Weighted-Average Grant-Date Fair Value
	Nonvested at January 1, 2014	944	$	107.4
	Granted	228		166.11
	Vested	-331		89.87
	Forfeited	-4		117.61
	Nonvested at March 31, 2014	837	$	130.28
	At March 31, 2014, there was $62 million of total unrecognized compensation expense related to nonvested performance retention awards, which is expected to be recognized over a weighted-average period of 1.7 years. This expense is subject to achievement of the ROIC levels established for the performance stock unit grants.

Retirement_Plans

Retirement Plans	3 Months Ended
	Mar. 31, 2014
Retirement Plans [Abstract]	'
Retirement Plans [Text Block]	'
	4. Retirement Plans
	Pension and Other Postretirement Benefits
	Pension Plans – We provide defined benefit retirement income to eligible non-union employees through qualified and non-qualified (supplemental) pension plans. Qualified and non-qualified pension benefits are based on years of service and the highest compensation during the latest years of employment, with specific reductions made for early retirements.
	Other Postretirement Benefits (OPEB) – We provide medical and life insurance benefits for eligible retirees. These benefits are funded as medical claims and life insurance premiums are paid.
	Expense
	Both pension and OPEB expense are determined based upon the annual service cost of benefits (the actuarial cost of benefits earned during a period) and the interest cost on those liabilities, less the expected return on plan assets. The expected long-term rate of return on plan assets is applied to a calculated value of plan assets that recognizes changes in fair value over a five-year period. This practice is intended to reduce year-to-year volatility in pension expense, but it can have the effect of delaying the recognition of differences between actual returns on assets and expected returns based on long-term rate of return assumptions. Differences in actual experience in relation to assumptions are not recognized in net income immediately, but are deferred in accumulated other comprehensive income and, if necessary, amortized as pension or OPEB expense.
	The components of our net periodic pension and OPEB cost/(benefit) were as follows for the three months ended March 31:
		Pension					OPEB
	Millions	2014		2013		2014		2013
	Service cost	$	18	$	19	$	1	$	1
	Interest cost		39		33		4		3
	Expected return on plan assets		-58		-51		-		-
	Amortization of:
	Prior service credit		-		-		-3		-4
	Actuarial loss		17		26		2		4
	Net periodic pension cost	$	16	$	27	$	4	$	4
	Cash Contributions
	For the three months ended March 31, 2014, we have not made any cash contributions to the qualified pension plan. Any contributions made during 2014 will be based on cash generated from operations and financial market considerations. Our policy with respect to funding the qualified plans is to fund at least the minimum required by law and not more than the maximum amount deductible for tax purposes. At March 31, 2014, we do not have minimum cash funding requirements for 2014.

Other_Income

Other Income	3 Months Ended
	Mar. 31, 2014
Other Income [Abstract]	'
Other Income [Text Block]	'
	5. Other Income
	Other income included the following:
	Millions,
	for the Three Months Ended March 31,		2014		2013
	Rental income [a]		$	24	$	37
	Net gain on non-operating asset dispositions			4		4
	Interest income			1		1
	Non-operating environmental costs and other [b]			9		-2
	Total		$	38	$	40
	[a]	2013 includes $17 million related to a land lease contract settlement.
	[b]	2014 includes $14 million related to the sale of a permanent easement.

Income_Taxes

Income Taxes	3 Months Ended
	Mar. 31, 2014
Income Tax [Abstract]	'
Income Taxes [Text Block]	'
	6. Income Taxes
	Internal Revenue Service (IRS) examinations have been completed and settled for all years prior to 2005, and the statute of limitations bars any additional tax assessments. The IRS has completed their examinations and issued notices of deficiency for tax years 2005 through 2010. We disagree with many of their proposed adjustments, and we are at IRS Appeals for those years. Additionally, several state tax authorities are examining our state income tax returns for years 2006 through 2010.
	In the fourth quarter of 2013, we reached an agreement in principle with the IRS to resolve all of the issues related to tax years 2005 through 2008, with the exception of interest calculations. We anticipate signing a closing agreement with the IRS for these years within the next 12 months. When signed, this closing agreement will not have a material effect on our consolidated results of operations, financial condition or liquidity.
	At March 31, 2014, we had a net liability for unrecognized tax benefits of $61 million. Of that amount, $26 million is classified as a current liability in the Condensed Consolidated Statements of Financial Position.

Earnings_Per_Share

Earnings Per Share	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share [Text Block]	'
	7. Earnings Per Share
	The following table provides a reconciliation between basic and diluted earnings per share:
	Millions, Except Per Share Amounts,
	for the Three Months Ended March 31,	2014		2013
	Net income	$	1,088	$	957
	Weighted-average number of shares outstanding:
	Basic		454.1		467.8
	Dilutive effect of stock options		1.2		1.4
	Dilutive effect of retention shares and units		0.9		1.3
	Diluted		456.2		470.5
	Earnings per share – basic	$	2.4	$	2.05
	Earnings per share – diluted	$	2.38	$	2.03
	Stock options excluded as their inclusion would be anti-dilutive		0.3		0.4

Accumulated_Other_Comprehensiv

Accumulated Other Comprehensive Income/(Loss)	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income/(Loss) [Abstract]	'
Accumulated Other Comprehensive Income/(Loss) [Text Block]	'
	8. Accumulated Other Comprehensive Income/(Loss)
	Reclassifications out of accumulated other comprehensive income/(loss) for the three months ended March 31, 2014, and 2013, were as follows (net of tax):
	Millions			Defined benefit plans	Foreign currency translation		Derivatives			Total
	Balance at January 1, 2014		$	-713	$	-37	$	-	$	-750
	Other comprehensive income/(loss) before reclassifications			10		-4		-		6
	Amounts reclassified from accumulated other comprehensive income/(loss) [a]			10		-		-		10
	Net year-to-date other comprehensive income/(loss), net of taxes of $5 million			20		-4		-		16
	Balance at March 31, 2014		$	-693	$	-41	$	-	$	-734
	Balance at January 1, 2013		$	-1,149	$	-36	$	-1	$	-1,186
	Other comprehensive income/(loss) before reclassifications			-2		3		-		1
	Amounts reclassified from accumulated other comprehensive income/(loss) [a]			16		-		-		16
	Net year-to-date other comprehensive income/(loss), net of taxes of $12 million			14		3		-		17
	Balance at March 31, 2013		$	-1,135	$	-33	$	-1	$	-1,169
	[a]	The accumulated other comprehensive income/(loss) reclassification components are 1) prior service cost/(benefit) and 2) net actuarial loss which are both included in the computation of net periodic pension cost. See Note 4 Retirement Plans for additional details.

Accounts_Receivable

Accounts Receivable	3 Months Ended
	Mar. 31, 2014
Accounts Receivable [Abstract]	'
Accounts Receivable [Text Block]	'
	9. Accounts Receivable
	Accounts receivable includes freight and other receivables reduced by an allowance for doubtful accounts. The allowance is based upon historical losses, credit worthiness of customers, and current economic conditions. At both March 31, 2014, and December 31, 2013, our accounts receivable were reduced by $1 million. Receivables not expected to be collected in one year and the associated allowances are classified as other assets in our Condensed Consolidated Statements of Financial Position. At March 31, 2014, and December 31, 2013, receivables classified as other assets were reduced by allowances of $21 million and $22 million, respectively.
	Receivables Securitization Facility – The Railroad maintains a $600 million, 364-day receivables securitization facility under which it sells most of its eligible third-party receivables to Union Pacific Receivables, Inc. (UPRI), a wholly-owned, bankruptcy-remote subsidiary that may subsequently transfer, without recourse, an undivided interest in accounts receivable to investors. The investors have no recourse to the Railroad's other assets except for customary warranty and indemnity claims. Creditors of the Railroad do not have recourse to the assets of UPRI.
	No amount was outstanding under the facility at both March 31, 2014, and December 31, 2013. The facility was supported by $1.2 billion and $1.1 billion of accounts receivable as collateral at March 31, 2014, and December 31, 2013, respectively, which, as a retained interest, is included in accounts receivable, net in our Condensed Consolidated Statements of Financial Position.
	The outstanding amount the Railroad is allowed to maintain under the facility, with a maximum of $600 million, may fluctuate based on the availability of eligible receivables and is directly affected by business volumes and credit risks, including receivables payment quality measures such as default and dilution ratios. If default or dilution ratios increase one percent, the allowable outstanding amount under the facility would not materially change.
	The costs of the receivables securitization facility include interest, which will vary based on prevailing benchmark and commercial paper rates, program fees paid to participating banks, commercial paper issuing costs, and fees of participating banks for unused commitment availability. The costs of the receivables securitization facility are included in interest expense and were $1 million for the three months ended March 31, 2014, and 2013.
	In July 2013, the $600 million receivables securitization facility was renewed for an additional 364-day period at comparable terms and conditions.

Properties

Properties	3 Months Ended
	Mar. 31, 2014
Properties [Abstract]	'
Properties [Text Block]	'
	10. Properties
	The following tables list the major categories of property and equipment, as well as the weighted average estimated useful life for each category (in years):
	Millions, Except Estimated Useful Life				Accumulated		Net Book		Estimated
	As of March 31, 2014		Cost		Depreciation		Value		Useful Life
	Land		$	5,128	$	N/A	$	5,128	N/A
	Road:
	Rail and other track material			14,053		5,048		9,005	33
	Ties			8,881		2,357		6,524	33
	Ballast			4,663		1,195		3,468	34
	Other roadway [a]			15,737		2,784		12,953	48
	Total road			43,334		11,384		31,950	N/A
	Equipment:
	Locomotives			7,724		3,544		4,180	20
	Freight cars			2,079		990		1,089	25
	Work equipment and other			559		126		433	18
	Total equipment			10,362		4,660		5,702	N/A
	Technology and other			797		286		511	11
	Construction in progress			898		-		898	N/A
	Total		$	60,519	$	16,330	$	44,189	N/A
	Millions, Except Estimated Useful Life				Accumulated		Net Book		Estimated
	As of December 31, 2013		Cost		Depreciation		Value		Useful Life
	Land		$	5,120	$	N/A	$	5,120	N/A
	Road:
	Rail and other track material			13,861		4,970		8,891	35
	Ties			8,785		2,310		6,475	33
	Ballast			4,621		1,171		3,450	34
	Other roadway [a]			15,596		2,726		12,870	48
	Total road			42,863		11,177		31,686	N/A
	Equipment:
	Locomotives			7,518		3,481		4,037	20
	Freight cars			2,085		1,000		1,085	25
	Work equipment and other			561		119		442	18
	Total equipment			10,164		4,600		5,564	N/A
	Technology and other			711		286		425	10
	Construction in progress			954		-		954	N/A
	Total		$	59,812	$	16,063	$	43,749	N/A
	[a]	Other roadway includes grading, bridges and tunnels, signals, buildings, and other road assets.

Accounts_Payable_and_Other_Cur

Accounts Payable and Other Current Liabilities	3 Months Ended
	Mar. 31, 2014
Accounts Payable and Other Current Liabilties [Abstract]	'
Accounts Payable and Other Current Liabilities [Text Block]	'
	11. Accounts Payable and Other Current Liabilities
		Mar. 31,		Dec. 31,
	Millions	2014		2013
	Accounts payable	$	888	$	803
	Income and other taxes payable		877		491
	Dividends payable		407		356
	Accrued wages and vacation		395		385
	Accrued casualty costs		204		207
	Interest payable		130		169
	Equipment rents payable		101		96
	Other		554		579
	Total accounts payable and other current liabilities	$	3,556	$	3,086

Financial_Instruments

Financial Instruments	3 Months Ended
	Mar. 31, 2014
Financial Instruments[Abstract]	'
Financial Instruments [Text Block]	'
	12. Financial Instruments
	Strategy and Risk – We may use derivative financial instruments in limited instances for other than trading purposes to assist in managing our overall exposure to fluctuations in interest rates and fuel prices. We are not a party to leveraged derivatives and, by policy, do not use derivative financial instruments for speculative purposes. Derivative financial instruments qualifying for hedge accounting must maintain a specified level of effectiveness between the hedging instrument and the item being hedged, both at inception and throughout the hedged period. We formally document the nature and relationships between the hedging instruments and hedged items at inception, as well as our risk-management objectives, strategies for undertaking the various hedge transactions, and method of assessing hedge effectiveness. Changes in the fair market value of derivative financial instruments that do not qualify for hedge accounting are charged to earnings. We may use swaps, collars, futures, and/or forward contracts to mitigate the risk of adverse movements in interest rates and fuel prices; however, the use of these derivative financial instruments may limit future benefits from favorable interest rate and fuel price movements.
	Interest Rate Cash Flow Hedges – We report changes in the fair value of cash flow hedges in accumulated other comprehensive loss until the hedged item affects earnings. At both March 31, 2014, and December 31, 2013, we had reductions of $1 million recorded as an accumulated other comprehensive loss that is being amortized on a straight-line basis through September 30, 2014, for a cash flow hedge that was settled in 2004. As of March 31, 2014, and December 31, 2013, we had no interest rate cash flow hedges outstanding.
	Fair Value of Financial Instruments – The fair value of our short- and long-term debt was estimated using a market value price model, which utilizes applicable U.S. Treasury rates along with current market quotes on comparable debt securities. All of the inputs used to determine the fair market value of the Corporation's long-term debt are Level 2 inputs and obtained from an independent source. At March 31, 2014, the fair value of total debt was $11.1 billion, approximately $0.9 billion more than the carrying value. At December 31, 2013, the fair value of total debt was $10.2 billion, approximately $0.6 billion more than the carrying value. The fair value of the Corporation's debt is a measure of its current value under present market conditions. It does not impact the financial statements under current accounting rules. At both March 31, 2014, and December 31, 2013, approximately $163 million of debt securities contained call provisions that allow us to retire the debt instruments prior to final maturity, with the payment of fixed call premiums, or in certain cases, at par. The fair value of our cash equivalents approximates their carrying value due to the short-term maturities of these instruments.

Debt

Debt	3 Months Ended
	Mar. 31, 2014
Debt [Abstract]	'
Debt [Text Block]	'
	13. Debt
	Credit Facilities – At March 31, 2014, we had $1.8 billion of credit available under our revolving credit facility (the facility), which is designated for general corporate purposes and supports the issuance of commercial paper. We did not draw on the facility at any time during the three months ended March 31, 2014. Commitment fees and interest rates payable under the facility are similar to fees and rates available to comparably rated, investment-grade borrowers. The facility allows for borrowings at floating rates based on London Interbank Offered Rates, plus a spread, depending upon credit ratings for our senior unsecured debt. The facility matures in 2015 under a four-year term and requires the Corporation to maintain a debt-to-net-worth coverage ratio as a condition to making a borrowing. At March 31, 2014, and December 31, 2013 (and at all times during the first quarter), we were in compliance with this covenant.
	The definition of debt used for purposes of calculating the debt-to-net-worth coverage ratio includes, among other things, certain credit arrangements, capital leases, guarantees and unfunded and vested pension benefits under Title IV of ERISA. At March 31, 2014, the debt-to-net-worth coverage ratio allowed us to carry up to $43 billion of debt (as defined in the facility), and we had $10.5 billion of debt (as defined in the facility) outstanding at that date. Under our current capital plans, we expect to continue to satisfy the debt-to-net-worth coverage ratio; however, many factors beyond our reasonable control could affect our ability to comply with this provision in the future. The facility does not include any other financial restrictions, credit rating triggers (other than rating-dependent pricing), or any other provision that could require us to post collateral. The facility also includes a $75 million cross-default provision and a change-of-control provision.
	During the three months ended March 31, 2014, we did not issue or repay any commercial paper, and at March 31, 2014, we had no commercial paper outstanding. Our revolving credit facility supports our outstanding commercial paper balances, and, unless we change the terms of our commercial paper program, our aggregate issuance of commercial paper will not exceed the amount of borrowings available under the facility.
	Shelf Registration Statement and Significant New Borrowings – Under our current shelf registration, we may issue, from time to time, any combination of debt securities, preferred stock, common stock, or warrants for debt securities or preferred stock in one or more offerings. We have no immediate plans to issue equity securities; however, we will continue to explore opportunities to replace existing debt or access capital through issuances of debt securities under our shelf registration, and, therefore, we may issue additional debt securities at any time.
	During the three months ended March 31, 2014, we issued the following unsecured, fixed-rate debt securities under our current shelf registration:
	Date	Description of Securities
	10-Jan-14	$300 million of 2.25% Notes due February 15, 2019
		$400 million of 3.75% Notes due March 15, 2024
		$300 million of 4.85% Notes due June 15, 2044
	We used the net proceeds from this offering for general corporate purposes, including the repurchase of common stock pursuant to our share repurchase program. These debt securities include change-of-control provisions. At March 31, 2014, we had remaining authority to issue up to $1.85 billion of debt securities under our shelf registration.
	Receivables Securitization Facility – As of March 31, 2014, and December 31, 2013, no amount was outstanding under our receivables securitization facility. See further discussion of our receivables securitization facility in Note 9.

Variable_Interest_Entities

Variable Interest Entities	3 Months Ended
	Mar. 31, 2014
Variable Interest Entities [Abstract]	'
Variable Interest Entities [Text Block]	'
	14. Variable Interest Entities
	We have entered into various lease transactions in which the structure of the leases contain variable interest entities (VIEs). These VIEs were created solely for the purpose of doing lease transactions (principally involving railroad equipment and facilities, including our headquarters building) and have no other activities, assets or liabilities outside of the lease transactions. Within these lease arrangements, we have the right to purchase some or all of the assets at fixed prices. Depending on market conditions, fixed-price purchase options available in the leases could potentially provide benefits to us; however, these benefits are not expected to be significant.
	We maintain and operate the assets based on contractual obligations within the lease arrangements, which set specific guidelines consistent within the railroad industry. As such, we have no control over activities that could materially impact the fair value of the leased assets. We do not hold the power to direct the activities of the VIEs and, therefore, do not control the ongoing activities that have a significant impact on the economic performance of the VIEs. Additionally, we do not have the obligation to absorb losses of the VIEs or the right to receive benefits of the VIEs that could potentially be significant to the VIEs.
	We are not considered to be the primary beneficiary and do not consolidate these VIEs because our actions and decisions do not have the most significant effect on the VIE's performance and our fixed-price purchase price options are not considered to be potentially significant to the VIEs. The future minimum lease payments associated with the VIE leases totaled $3.2 billion as of March 31, 2014.

Commitments_and_Contingencies

Commitments and Contingencies	3 Months Ended
	Mar. 31, 2014
Commitments And Contingencies [Abstract]	'
Commitments and Contingencies [Text Block]	'
	15. Commitments and Contingencies
	Asserted and Unasserted Claims – Various claims and lawsuits are pending against us and certain of our subsidiaries. We cannot fully determine the effect of all asserted and unasserted claims on our consolidated results of operations, financial condition, or liquidity; however, to the extent possible, where asserted and unasserted claims are considered probable and where such claims can be reasonably estimated, we have recorded a liability. We do not expect that any known lawsuits, claims, environmental costs, commitments, contingent liabilities, or guarantees will have a material adverse effect on our consolidated results of operations, financial condition, or liquidity after taking into account liabilities and insurance recoveries previously recorded for these matters.
	Personal Injury – The cost of personal injuries to employees and others related to our activities is charged to expense based on estimates of the ultimate cost and number of incidents each year. We use an actuarial analysis to measure the expense and liability, including unasserted claims. The Federal Employers' Liability Act (FELA) governs compensation for work-related accidents. Under FELA, damages are assessed based on a finding of fault through litigation or out-of-court settlements. We offer a comprehensive variety of services and rehabilitation programs for employees who are injured at work.
	Our personal injury liability is not discounted to present value due to the uncertainty surrounding the timing of future payments. Approximately 92% of the recorded liability is related to asserted claims and approximately 8% is related to unasserted claims at March 31, 2014. Because of the uncertainty surrounding the ultimate outcome of personal injury claims, it is reasonably possible that future costs to settle these claims may range from approximately $294 million to $322 million. We record an accrual at the low end of the range as no amount of loss within the range is more probable than any other. Estimates can vary over time due to evolving trends in litigation.
	Our personal injury liability activity was as follows:
	Millions,
	for the Three Months Ended March 31,	2014		2013
	Beginning balance	$	294	$	334
	Current year accruals		23		27
	Changes in estimates for prior years		-6		-8
	Payments		-17		-18
	Ending balance at March 31	$	294	$	335
	Current portion, ending balance at March 31	$	78	$	97
	Asbestos – We are a defendant in a number of lawsuits in which current and former employees and other parties allege exposure to asbestos. We assess our potential liability using a statistical analysis of resolution costs for asbestos-related claims. This liability is updated annually and excludes future defense and processing costs. The liability for resolving both asserted and unasserted claims was based on the following assumptions:
	The ratio of future claims by alleged disease would be consistent with historical averages adjusted for inflation.
	The number of claims filed against us will decline each year.
	The average settlement values for asserted and unasserted claims will be equivalent to historical averages.
	The percentage of claims dismissed in the future will be equivalent to historical averages.
	Our liability for asbestos-related claims is not discounted to present value due to the uncertainty surrounding the timing of future payments. Approximately 20% of the recorded liability related to asserted claims and approximately 80% related to unasserted claims at March 31, 2014.
	Our asbestos-related liability activity was as follows:
	Millions,
	for the Three Months Ended March 31,	2014		2013
	Beginning balance	$	131	$	139
	Accruals		-		-
	Payments		-2		-3
	Ending balance at March 31	$	129	$	136
	Current portion, ending balance at March 31	$	9	$	9
	We have insurance coverage for a portion of the costs incurred to resolve asbestos-related claims, and we have recognized an asset for estimated insurance recoveries at March 31, 2014, and December 31, 2013.
	We believe that our estimates of liability for asbestos-related claims and insurance recoveries are reasonable and probable. The amounts recorded for asbestos-related liabilities and related insurance recoveries were based on currently known facts. However, future events, such as the number of new claims filed each year, average settlement costs, and insurance coverage issues, could cause the actual costs and insurance recoveries to be higher or lower than the projected amounts. Estimates also may vary in the future if strategies, activities, and outcomes of asbestos litigation materially change; federal and state laws governing asbestos litigation increase or decrease the probability or amount of compensation of claimants; and there are material changes with respect to payments made to claimants by other defendants.
	Environmental Costs – We are subject to federal, state, and local environmental laws and regulations. We have identified 269 sites at which we are or may be liable for remediation costs associated with alleged contamination or for violations of environmental requirements. This includes 31 sites that are the subject of actions taken by the U.S. government, 17 of which are currently on the Superfund National Priorities List. Certain federal legislation imposes joint and several liability for the remediation of identified sites; consequently, our ultimate environmental liability may include costs relating to activities of other parties, in addition to costs relating to our own activities at each site.
	When we identify an environmental issue with respect to property owned, leased, or otherwise used in our business, we perform, with assistance of our consultants, environmental assessments on the property. We expense the cost of the assessments as incurred. We accrue the cost of remediation where our obligation is probable and such costs can be reasonably estimated. We do not discount our environmental liabilities when the timing of the anticipated cash payments is not fixed or readily determinable. At both March 31, 2014, and December 31, 2013, none of our environmental liability was discounted.
	Our environmental liability activity was as follows:
	Millions,
	for the Three Months Ended March 31,	2014		2013
	Beginning balance	$	171	$	170
	Accruals		6		7
	Payments		-11		-11
	Ending balance at March 31	$	166	$	166
	Current portion, ending balance at March 31	$	52	$	50
	The environmental liability includes future costs for remediation and restoration of sites, as well as ongoing monitoring costs, but excludes any anticipated recoveries from third parties. Cost estimates are based on information available for each site, financial viability of other potentially responsible parties, and existing technology, laws, and regulations. The ultimate liability for remediation is difficult to determine because of the number of potentially responsible parties, site-specific cost sharing arrangements with other potentially responsible parties, the degree of contamination by various wastes, the scarcity and quality of volumetric data related to many of the sites, and the speculative nature of remediation costs. Estimates of liability may vary over time due to changes in federal, state, and local laws governing environmental remediation. Current obligations are not expected to have a material adverse effect on our consolidated results of operations, financial condition, or liquidity.
	Insurance – The Company has a consolidated, wholly-owned captive insurance subsidiary (the captive), that provides insurance coverage for certain risks including FELA claims and property coverage which are subject to reinsurance. The captive entered into annual reinsurance treaty agreements that insure workers compensation, general liability, auto liability and FELA risk. The captive cedes a portion of its FELA exposure through the treaty and assumes a proportionate share of the entire risk. The captive receives direct premiums, which are netted against the Company's premium costs in other expenses in the Condensed Consolidated Statements of Income. The treaty agreements provide for certain protections against the risk of treaty participants' non-performance, and we do not believe our exposure to treaty participants' non-performance is material at this time. In the event the Company leaves the reinsurance program, the Company is not relieved of its primary obligation to the policyholders for activity prior to the termination of the treaty agreements. We record both liabilities and reinsurance receivables using an actuarial analysis based on historical experience in our Condensed Consolidated Statements of Financial Position.
	Guarantees – At both March 31, 2014, and December 31, 2013, we were contingently liable for guarantees of $299 million. We have recorded a liability of $1 million for the fair value of these obligations as of both March 31, 2014, and December 31, 2013. We entered into these contingent guarantees in the normal course of business, and they include guaranteed obligations related to our headquarters building, equipment financings, and affiliated operations. The final guarantee expires in 2022. We are not aware of any existing event of default that would require us to satisfy these guarantees. We do not expect that these guarantees will have a material adverse effect on our consolidated financial condition, results of operations, or liquidity.
	Indemnities – Our maximum potential exposure under indemnification arrangements, including certain tax indemnifications, can range from a specified dollar amount to an unlimited amount, depending on the nature of the transactions and the agreements. Due to uncertainty as to whether claims will be made or how they will be resolved, we cannot reasonably determine the probability of an adverse claim or reasonably estimate any adverse liability or the total maximum exposure under these indemnification arrangements. We do not have any reason to believe that we will be required to make any material payments under these indemnity provisions.
	Operating Leases – At March 31, 2014, we had commitments for future minimum lease payments under operating leases with initial or remaining non-cancelable lease terms in excess of one year of approximately $4 billion.
	Gain Contingency – UPRR and Santa Fe Pacific Pipelines (SFPP, a subsidiary of Kinder Morgan Energy Partners, L.P.) currently are engaged in a proceeding to resolve the fair market rent payable to UPRR under a 10-year agreement commencing on January 1, 2004, for pipeline easements on UPRR rights-of-way (Union Pacific Railroad Company vs. Santa Fe Pacific Pipelines, Inc., SFPP, L.P., Kinder Morgan Operating L.P. “D” Kinder Morgan G.P., Inc., et al., Superior Court of the State of California for the County of Los Angeles, filed July 28, 2004). In February 2007, a trial began to resolve this issue, and, on September 28, 2011, the judge issued a tentative Statement of Decision, which concluded that SFPP owes back rent to UPRR for the years 2004 through 2011. On May 29, 2012, the court entered judgment, awarding UPRR back rent and prejudgment interest. SFPP is appealing the final judgment. A favorable final judgment may materially affect our results of operations in the period of any monetary recoveries; however, due to the uncertainty regarding the amount and timing of any recovery, including the outcome of SFPP's appeal of this judgment or any subsequent proceeding, we consider this a gain contingency and do not reflect any amounts in the Condensed Consolidated Financial Statements as of March 31, 2014.

Share_Repurchase_Program

Share Repurchase Program	3 Months Ended
	Mar. 31, 2014
Share Repurchase Program [Abstract]	'
Share Repurchase Program [Text Block]	'
	16. Share Repurchase Program
	Effective January 1, 2014, our Board of Directors authorized the repurchase of up to 60 million shares of our common stock by December 31, 2017, replacing our previous repurchase program. As of March 31, 2014, we repurchased a total of $10.0 billion of our common stock since the commencement of our repurchase programs in 2007. The table below represents shares repurchased in the first quarter of 2013 under our previous repurchase program, and shares repurchased in the first quarter of 2014 under the new program.
		Number of Shares Purchased		Average Price Paid
		2014	2013		2014		2013
	First quarter	3,820,000	2,881,400	$	178.85	$	136.58
	Remaining number of shares that may be repurchased under current authority						56,180,000
	Management's assessments of market conditions and other pertinent factors guide the timing and volume of all repurchases. We expect to fund any share repurchases under this program through cash generated from operations, the sale or lease of various operating and non-operating properties, debt issuances, and cash on hand. Repurchased shares are recorded in treasury stock at cost, which includes any applicable commissions and fees.

Operations_And_Segmentation_Ta

Operations And Segmentation (Tables)	3 Months Ended
	Mar. 31, 2014
Operations and Segmentation [Abstract]	'
Freight Revenue By Commodity Group [Table Text Block]	'
	The following table provides freight revenue by commodity group:
	Millions,
	for the Three Months Ended March 31,		2014		2013
	Agricultural	$	910	$	784
	Automotive		488		487
	Chemicals		893		873
	Coal		961		936
	Industrial Products		1,011		916
	Intermodal		1,023		988
	Total freight revenues	$	5,286	$	4,984
	Other revenues		352		306
	Total operating revenues	$	5,638	$	5,290

StockBased_Compensation_Tables

Stock-Based Compensation (Tables)	3 Months Ended
	Mar. 31, 2014
Stock-Based Compensation [Abstract]	'
Stock-Based Compensation [Table Text Block]	'
	Information regarding stock-based compensation appears in the table below:
	Millions,
	for the Three Months Ended March 31,	2014		2013
	Stock-based compensation, before tax:
	Stock options	$	6	$	4
	Retention awards		29		21
	Total stock-based compensation, before tax	$	35	$	25
	Excess tax benefits from equity compensation plans	$	60	$	46
Stock Options Weight Average Assumptions [Table Text Block]	'
	The table below shows the annual weighted-average assumptions used for valuation purposes:
	Weighted-Average Assumptions		2014		2013
	Risk-free interest rate		1.60%		0.80%
	Dividend yield		2.10%		2.10%
	Expected life (years)		5.2		5
	Volatility		30.00%		36.20%
	Weighted-average grant-date fair value of options granted	$	40.35	$	34.98
Stock Options Activity [Table Text Block]	'
	A summary of stock option activity during the three months ended March 31, 2014, is presented below:
		Options (thous.)	Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term	Aggregate Intrinsic Value (millions)
	Outstanding at January 1, 2014	3,722	$	80.14	5.8 yrs.	$	327
	Granted	494		175.12	N/A		N/A
	Exercised	-308		70.47	N/A		N/A
	Forfeited or expired	-2		126.11	N/A		N/A
	Outstanding at March 31, 2014	3,906	$	92.89	6	$	370
	Vested or expected to vest at March 31, 2014	3,874	$	92.41	6	$	369
	Options exercisable at March 31, 2014	2,842	$	71.88	4.9	$	329
Stock Option Exercises [Table Text Block]	'
	Additional information regarding stock option exercises appears in the table below:
	Millions,
	for the Three Months Ended March 31,	2014		2013
	Intrinsic value of stock options exercised	$	34	$	28
	Cash received from option exercises		18		14
	Treasury shares repurchased for employee payroll taxes		-7		-5
	Tax benefit realized from option exercises		13		11
	Aggregate grant-date fair value of stock options vested		17		16
Retention Awards Activity [Table Text Block]	'
	Changes in our retention awards during the three months ended March 31, 2014, were as follows:
		Shares (thous.)	Weighted-Average Grant-Date Fair Value
	Nonvested at January 1, 2014	1,856	$	98.04
	Granted	411		175.12
	Vested	-532		62.13
	Forfeited	-10		108.69
	Nonvested at March 31, 2014	1,725	$	127.42
Performance Retention Awards Present Value Calculation Assumptions [Table Text Block]	'
	The assumptions used to calculate the present value of estimated future dividends related to the February 2014, grant were as follows:
		2014
	Dividend per share per quarter	$	0.91
	Risk-free interest rate at date of grant		0.70%
Performance Based Units Activity [Table Text Block]	'
	Changes in our performance retention awards during the three months ended March 31, 2014, were as follows:
		Shares (thous.)	Weighted-Average Grant-Date Fair Value
	Nonvested at January 1, 2014	944	$	107.4
	Granted	228		166.11
	Vested	-331		89.87
	Forfeited	-4		117.61
	Nonvested at March 31, 2014	837	$	130.28

Retirement_Plans_Tables

Retirement Plans (Tables)	3 Months Ended
	Mar. 31, 2014
Retirement Plans [Abstract]	'
Net Periodic Pension And OPEB Cost [Table Text Block]	'
	The components of our net periodic pension and OPEB cost/(benefit) were as follows for the three months ended March 31:
		Pension					OPEB
	Millions	2014		2013		2014		2013
	Service cost	$	18	$	19	$	1	$	1
	Interest cost		39		33		4		3
	Expected return on plan assets		-58		-51		-		-
	Amortization of:
	Prior service credit		-		-		-3		-4
	Actuarial loss		17		26		2		4
	Net periodic pension cost	$	16	$	27	$	4	$	4

Other_Income_Tables

Other Income (Tables)	3 Months Ended
	Mar. 31, 2014
Other Income [Abstract]	'
Other Income [Table Text Block]	'
	Other income included the following:
	Millions,
	for the Three Months Ended March 31,		2014		2013
	Rental income [a]		$	24	$	37
	Net gain on non-operating asset dispositions			4		4
	Interest income			1		1
	Non-operating environmental costs and other [b]			9		-2
	Total		$	38	$	40
	[a]	2013 includes $17 million related to a land lease contract settlement.
	[b]	2014 includes $14 million related to the sale of a permanent easement.

Earnings_Per_Share_Tables

Earnings Per Share (Tables)	3 Months Ended
	Mar. 31, 2014
Earnings Per Share [Abstract]	'
Earnings Per Share [Table Text Block]	'
	The following table provides a reconciliation between basic and diluted earnings per share:
	Millions, Except Per Share Amounts,
	for the Three Months Ended March 31,	2014		2013
	Net income	$	1,088	$	957
	Weighted-average number of shares outstanding:
	Basic		454.1		467.8
	Dilutive effect of stock options		1.2		1.4
	Dilutive effect of retention shares and units		0.9		1.3
	Diluted		456.2		470.5
	Earnings per share – basic	$	2.4	$	2.05
	Earnings per share – diluted	$	2.38	$	2.03
	Stock options excluded as their inclusion would be anti-dilutive		0.3		0.4

Accumulated_Other_Comprehensiv1

Accumulated Other Comprehensive Income/(Loss) (Tables)	3 Months Ended
	Mar. 31, 2014
Accumulated Other Comprehensive Income/(Loss) [Abstract]	'
Accumulated Other Comprehensive Income/(Loss) [Table Text Block]	'
	Reclassifications out of accumulated other comprehensive income/(loss) for the three months ended March 31, 2014, and 2013, were as follows (net of tax):
	Millions			Defined benefit plans	Foreign currency translation		Derivatives			Total
	Balance at January 1, 2014		$	-713	$	-37	$	-	$	-750
	Other comprehensive income/(loss) before reclassifications			10		-4		-		6
	Amounts reclassified from accumulated other comprehensive income/(loss) [a]			10		-		-		10
	Net year-to-date other comprehensive income/(loss), net of taxes of $5 million			20		-4		-		16
	Balance at March 31, 2014		$	-693	$	-41	$	-	$	-734
	Balance at January 1, 2013		$	-1,149	$	-36	$	-1	$	-1,186
	Other comprehensive income/(loss) before reclassifications			-2		3		-		1
	Amounts reclassified from accumulated other comprehensive income/(loss) [a]			16		-		-		16
	Net year-to-date other comprehensive income/(loss), net of taxes of $12 million			14		3		-		17
	Balance at March 31, 2013		$	-1,135	$	-33	$	-1	$	-1,169
	[a]	The accumulated other comprehensive income/(loss) reclassification components are 1) prior service cost/(benefit) and 2) net actuarial loss which are both included in the computation of net periodic pension cost. See Note 4 Retirement Plans for additional details.

Properties_Tables

Properties (Tables)	3 Months Ended
	Mar. 31, 2014
Properties [Abstract]	'
Properties [Table Text Block]	'
	The following tables list the major categories of property and equipment, as well as the weighted average estimated useful life for each category (in years):
	Millions, Except Estimated Useful Life				Accumulated		Net Book		Estimated
	As of March 31, 2014		Cost		Depreciation		Value		Useful Life
	Land		$	5,128	$	N/A	$	5,128	N/A
	Road:
	Rail and other track material			14,053		5,048		9,005	33
	Ties			8,881		2,357		6,524	33
	Ballast			4,663		1,195		3,468	34
	Other roadway [a]			15,737		2,784		12,953	48
	Total road			43,334		11,384		31,950	N/A
	Equipment:
	Locomotives			7,724		3,544		4,180	20
	Freight cars			2,079		990		1,089	25
	Work equipment and other			559		126		433	18
	Total equipment			10,362		4,660		5,702	N/A
	Technology and other			797		286		511	11
	Construction in progress			898		-		898	N/A
	Total		$	60,519	$	16,330	$	44,189	N/A
	Millions, Except Estimated Useful Life				Accumulated		Net Book		Estimated
	As of December 31, 2013		Cost		Depreciation		Value		Useful Life
	Land		$	5,120	$	N/A	$	5,120	N/A
	Road:
	Rail and other track material			13,861		4,970		8,891	35
	Ties			8,785		2,310		6,475	33
	Ballast			4,621		1,171		3,450	34
	Other roadway [a]			15,596		2,726		12,870	48
	Total road			42,863		11,177		31,686	N/A
	Equipment:
	Locomotives			7,518		3,481		4,037	20
	Freight cars			2,085		1,000		1,085	25
	Work equipment and other			561		119		442	18
	Total equipment			10,164		4,600		5,564	N/A
	Technology and other			711		286		425	10
	Construction in progress			954		-		954	N/A
	Total		$	59,812	$	16,063	$	43,749	N/A
	[a]	Other roadway includes grading, bridges and tunnels, signals, buildings, and other road assets.

Recovered_Sheet1

Accounts Payable And Other Current Liabilities (Tables)	3 Months Ended
	Mar. 31, 2014
Accounts Payable and Other Current Liabilties [Abstract]	'
Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]	'
	Accounts Payable and Other Current Liabilities
		Mar. 31,		Dec. 31,
	Millions	2014		2013
	Accounts payable	$	888	$	803
	Income and other taxes payable		877		491
	Dividends payable		407		356
	Accrued wages and vacation		395		385
	Accrued casualty costs		204		207
	Interest payable		130		169
	Equipment rents payable		101		96
	Other		554		579
	Total accounts payable and other current liabilities	$	3,556	$	3,086

Debt_Tables

Debt (Tables)	3 Months Ended
	Mar. 31, 2014
Debt [Abstract]	'
Unsecured Fixed Rate Debt Securities Issued Under Current Shelf Registration [Table Text Block]	'
	During the three months ended March 31, 2014, we issued the following unsecured, fixed-rate debt securities under our current shelf registration:
	Date	Description of Securities
	10-Jan-14	$300 million of 2.25% Notes due February 15, 2019
		$400 million of 3.75% Notes due March 15, 2024
		$300 million of 4.85% Notes due June 15, 2044

Commitments_And_Contingencies_

Commitments And Contingencies (Tables)	3 Months Ended
	Mar. 31, 2014
Commitments And Contingencies Tables [Abstract]	'
Commitments And Contingencies Activity [Table Text Block]	'
	Our personal injury liability activity was as follows:
	Millions,
	for the Three Months Ended March 31,	2014		2013
	Beginning balance	$	294	$	334
	Current year accruals		23		27
	Changes in estimates for prior years		-6		-8
	Payments		-17		-18
	Ending balance at March 31	$	294	$	335
	Current portion, ending balance at March 31	$	78	$	97
	Our asbestos-related liability activity was as follows:
	Millions,
	for the Three Months Ended March 31,	2014		2013
	Beginning balance	$	131	$	139
	Accruals		-		-
	Payments		-2		-3
	Ending balance at March 31	$	129	$	136
	Current portion, ending balance at March 31	$	9	$	9
	Our environmental liability activity was as follows:
	Millions,
	for the Three Months Ended March 31,	2014		2013
	Beginning balance	$	171	$	170
	Accruals		6		7
	Payments		-11		-11
	Ending balance at March 31	$	166	$	166
	Current portion, ending balance at March 31	$	52	$	50

Share_Repurchase_Program_Table

Share Repurchase Program (Tables)	3 Months Ended
	Mar. 31, 2014
Share Repurchase Program [Abstract]	'
Share Repurchase Program [Table Text Block]	'
	The table below represents shares repurchased in the first quarter of 2013 under our previous repurchase program, and shares repurchased in the first quarter of 2014 under the new program.
		Number of Shares Purchased		Average Price Paid
		2014	2013		2014		2013
	First quarter	3,820,000	2,881,400	$	178.85	$	136.58
	Remaining number of shares that may be repurchased under current authority						56,180,000

Operations_And_Segmentation_De

Operations And Segmentation (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Commodity Group Information [Line Items]	'	'
Freight revenues	$5,286	$4,984
Other revenues	352	306
Total operating revenues	5,638	5,290
Freight revenues - Mexico	540	505
Agriculture [Member]	'	'
Commodity Group Information [Line Items]	'	'
Freight revenues	910	784
Automotive [Member]	'	'
Commodity Group Information [Line Items]	'	'
Freight revenues	488	487
Chemicals [Member]	'	'
Commodity Group Information [Line Items]	'	'
Freight revenues	893	873
Coal [Member]	'	'
Commodity Group Information [Line Items]	'	'
Freight revenues	961	936
Industrial Products [Member]	'	'
Commodity Group Information [Line Items]	'	'
Freight revenues	1,011	916
Intermodal [Member]	'	'
Commodity Group Information [Line Items]	'	'
Freight revenues	$1,023	$988

StockBased_Compensation_Detail

Stock-Based Compensation (Details 1) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Stock-Based Compensation, Before Tax: [Abstract]	'	'
Stock options	$6	$4
Retention awards	29	21
Total stock-based compensation, before tax	35	25
Excess tax benefits from equity compensation plans	$60	$46

StockBased_Compensation_Detail1

Stock-Based Compensation (Details 2) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Stock Options [Member]	'	'
Assumptions For Stock Awards [Abstract]	'	'
Risk-free interest rate	1.60%	0.80%
Dividend yield	2.10%	2.10%
Expected life (years)	'5 years 2 months	'5 years
Volatility	30.00%	36.20%
Weighted-average grant-date fair value of options granted	$40.35	$34.98
Performance Retention Awards [Member]	'	'
Assumptions For Stock Awards [Abstract]	'	'
Dividend per share per quarter	$0.91	'
Risk-free interest rate	0.70%	'
Continued employment requirement	'Stock units awarded to selected employees under these grants are subject to continued employment for 37 months and the attainment of certain levels of ROIC.	'

StockBased_CompensationDetails

Stock-Based Compensation(Details 3) (USD $)	3 Months Ended
In Millions, except Share data in Thousands, unless otherwise specified	Mar. 31, 2014
Stock Options [Member]	'
Stock Option Activity [Abstract]	'
Stock options, shares outstanding at January 1, 2014	3,722
Stock options, shares granted	494
Stock options, shares exercised	-308
Stock options, shares forfeited or expired	-2
Stock options, shares outstanding at March 31, 2014	3,906
Stock options, shares vested or expected to vest at March 31, 2014	3,874
Stock options, shares exercisable at March 31, 2014	2,842
Stock options weighted-average exercise price, outstanding at January 1, 2014	$80.14
Stock options weighted-average exercise price, granted	$175.12
Stock options weighted-average exercise price, exercised	$70.47
Stock options weighted-average exercise price, forfeited or expired	$126.11
Stock options weighted-average exercise price, outstanding at March 31, 2014	$92.89
Stock options weighted-average exercise price, vested or expected to vest at March 31, 2014	$92.41
Stock options weighted-average exercise price, options exercisable at March 31, 2014	$71.88
Stock options weighted-average remaining contractual term in years, outstanding at January 1, 2014	'5 years 10 months
Stock options weighted-average remaining contractual term in years, outstanding at March 31, 2014	'6 years
Stock options weighted-average remaining contractual term in years, vested or expected to vest at March 31, 2014	'6 years
Stock options weighted-average remaining contractual term in years, options exercisable at March 31, 2014	'4 years 11 months
Stock options aggregate intrinsic value, outstanding at January 1, 2014	$327
Stock options aggregate intrinsic value, outstanding at March 31, 2014	370
Stock options aggregate intrinsic value, vested or expected to vest at March 31, 2014	369
Stock options aggregate intrinsic value, options exercisable at March 31, 2014	329
Contractual Term	'Stock options are granted at the closing price on the date of grant, have ten-year contractual terms
Stock options, years until vest	'3 years
Stock options, subject to performance or market-based vesting conditions	'None
Unrecognized Compensation Expense [Abstract]	'
Unrecognized compensation expense	29
Expected weighted-average period (in years) of nonvested stock options to be recognized	'1 year 10 months
Retention Awards [Member]	'
Awards Activity [Abstract]	'
Awards, shares nonvested at January 1, 2014	1,856
Awards, shares granted	411
Awards, shares vested	-532
Awards, shares forfeited	-10
Awards, shares nonvested at March 31, 2014	1,725
Awards weighted-average grant-date fair value, nonvested at January 1, 2014	$98.04
Awards weighted-average grant-date fair value, granted	$175.12
Awards weighted-average grant-date fair value, vested	$62.13
Awards weighted-average grant-date fair value, forfeited	$108.69
Awards weighted-average grant-date fair value, nonvested at March 31, 2014	$127.42
Unrecognized Compensation Expense [Abstract]	'
Unrecognized compensation expense	124
Expected weighted-average period (in years) of nonvested stock options to be recognized	'2 years 4 months
Performance Retention Awards [Member]	'
Awards Activity [Abstract]	'
Awards, shares nonvested at January 1, 2014	944
Awards, shares granted	228
Awards, shares vested	-331
Awards, shares forfeited	-4
Awards, shares nonvested at March 31, 2014	837
Awards weighted-average grant-date fair value, nonvested at January 1, 2014	$107.40
Awards weighted-average grant-date fair value, granted	$166.11
Awards weighted-average grant-date fair value, vested	$89.87
Awards weighted-average grant-date fair value, forfeited	$117.61
Awards weighted-average grant-date fair value, nonvested at March 31, 2014	$130.28
Unrecognized Compensation Expense [Abstract]	'
Unrecognized compensation expense	$62
Expected weighted-average period (in years) of nonvested stock options to be recognized	'1 year 8 months

StockBased_Compensation_Detail2

Stock-Based Compensation (Details 4) (Stock Options [Member], USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Stock Options [Member]	'	'
Stock Option Aggregate Disclosures [Abstract]	'	'
Intrinsic value of stock options exercised	$34	$28
Cash received from option exercises	18	14
Treasury shares repurchased for employee payroll taxes	-7	-5
Tax benefit realized from option exercises	13	11
Aggregate grant-date fair value of stock options vested	$17	$16

Retirement_Plans_Details

Retirement Plans (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Pension [Member]	'	'
Net Periodic Pension And OPEB Cost [Line Items]	'	'
Service cost	$18	$19
Interest cost	39	33
Expected return on plan assets	-58	-51
Amortization of prior service credit	0	0
Amortization of actuarial loss	17	26
Net periodic pension/OPEB cost	16	27
Cash contributions to qualified pension plan	0	'
OPEB [Member]	'	'
Net Periodic Pension And OPEB Cost [Line Items]	'	'
Service cost	1	1
Interest cost	4	3
Expected return on plan assets	0	0
Amortization of prior service credit	-3	-4
Amortization of actuarial loss	2	4
Net periodic pension/OPEB cost	$4	$4

Other_Income_Details

Other Income (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Other Income Details [Abstract]	'		'
Rental income	$24		$37	[1]
Net gain on non-operating asset dispositions	4		4
Interest Income	1		1
Non-operating environmental costs and other	9	[2]	-2
Total	38		40
Land lease contract settlement	'		17
Permanent easement sale	$14		'
[1]	2013 includes $17 million related to a land lease contract settlement.
[2]	2014 includes $14 million related to the sale of a permanent easement.

Income_Taxes_Details

Income Taxes (Details) (USD $)	Mar. 31, 2014
In Millions, unless otherwise specified
Current Unrecognized Tax Benefits [Abstract]	'
Net unrecognized tax benefit liability	$61
Current liability for unrecognized tax benefits	$26

Earnings_Per_Share_Details

Earnings Per Share (Details) (USD $)	3 Months Ended
In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share Details [Abstract]	'	'
Net income	$1,088	$957
Weighted-Average Number Of Shares Outstanding [Abstract]	'	'
Basic	454.1	467.8
Dilutive effect of stock options	1.2	1.4
Dilutive effect of retention shares and units	0.9	1.3
Diluted	456.2	470.5
Earnings per share - basic	$2.40	$2.05
Earnings per share - diluted	$2.38	$2.03
Stock options excluded as their inclusion would be antidilutive	0.3	0.4

Accumulated_Other_Comprehensiv2

Accumulated Other Comprehensive Income/(Loss) (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014		Mar. 31, 2013
Accumulated Other Comprehensive Income/(Loss) Net Of Tax [Line Items]	'		'
Balance at January 1	($750)		($1,186)
Other comprehensive income/(loss) before reclassifications	6		1
Amounts reclassified from accumulated other comprehensive income/(loss)	10	[1]	16	[1]
Net to-date other comprehensive income/(loss), net of taxes	16	[2]	17	[2]
Balance at March 31	-734		-1,169
Defined Benefit Plans [Member]	'		'
Accumulated Other Comprehensive Income/(Loss) Net Of Tax [Line Items]	'		'
Balance at January 1	-713		-1,149
Other comprehensive income/(loss) before reclassifications	10		-2
Amounts reclassified from accumulated other comprehensive income/(loss)	10	[1]	16	[1]
Net to-date other comprehensive income/(loss), net of taxes	20		14
Balance at March 31	-693		-1,135
Foreign Currency Translation [Member]	'		'
Accumulated Other Comprehensive Income/(Loss) Net Of Tax [Line Items]	'		'
Balance at January 1	-37		-36
Other comprehensive income/(loss) before reclassifications	-4		3
Amounts reclassified from accumulated other comprehensive income/(loss)	0		0
Net to-date other comprehensive income/(loss), net of taxes	-4		3
Balance at March 31	-41		-33
Derivatives [Member]	'		'
Accumulated Other Comprehensive Income/(Loss) Net Of Tax [Line Items]	'		'
Balance at January 1	0		-1
Other comprehensive income/(loss) before reclassifications	0		0
Amounts reclassified from accumulated other comprehensive income/(loss)	0		0
Net to-date other comprehensive income/(loss), net of taxes	0		0
Balance at March 31	$0		($1)
[1]	The accumulated other comprehensive income/(loss) reclassification components are 1) prior service cost/(benefit) and 2) net actuarial loss which are both included in the computation of net periodic pension cost. See Note 4 Retirement Plans for additional details.
[2]	Net of deferred taxes of $5 million and $12 million during the three months ended March 31, 2014, and 2013, respectively.

Accounts_Receivable_Details

Accounts Receivable (Details) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Accounts Receivable Details [Abstract]	'	'	'
Allowance for doubtful accounts	$1	'	$1
Allowance for doubtful accounts - receivables not expected to be collected in one year	21	'	22
Receivables Securitization Facility [Abstract]	'	'	'
Total capacity to transfer undivided interests to investors under the receivables securitization facility	600	600	600
Value of the outstanding undivided interest held by investors under the receivables securitization facility	0	'	0
Accounts receivable supporting the undivided interest held by investors	1,200	'	1,100
Cost of the receivables securitization facility - interest expense	$1	$1	'

Properties_Details

Properties (Details) (USD $)	3 Months Ended		12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014		Dec. 31, 2013
Property, Plant and Equipment [Line Items]	'		'
Cost	$60,519		$59,812
Accumulated depreciation	16,330		16,063
Net book value	44,189		43,749
Land [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	5,128		5,120
Net book value	5,128		5,120
Road: Rail and Other Track Material [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	14,053		13,861
Accumulated depreciation	5,048		4,970
Net book value	9,005		8,891
Estimated useful life	'33 years		'35 years
Road: Ties [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	8,881		8,785
Accumulated depreciation	2,357		2,310
Net book value	6,524		6,475
Estimated useful life	'33 years		'33 years
Road: Ballast [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	4,663		4,621
Accumulated depreciation	1,195		1,171
Net book value	3,468		3,450
Estimated useful life	'34 years		'34 years
Road: Other Roadway [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	15,737	[1]	15,596	[1]
Accumulated depreciation	2,784	[1]	2,726	[1]
Net book value	12,953	[1]	12,870	[1]
Estimated useful life	'48 years	[1]	'48 years	[1]
Total Road [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	43,334		42,863
Accumulated depreciation	11,384		11,177
Net book value	31,950		31,686
Equipment: Locomotives [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	7,724		7,518
Accumulated depreciation	3,544		3,481
Net book value	4,180		4,037
Estimated useful life	'20 years		'20 years
Equipment: Freight Cars [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	2,079		2,085
Accumulated depreciation	990		1,000
Net book value	1,089		1,085
Estimated useful life	'25 years		'25 years
Equipment: Work Equipment And Other [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	559		561
Accumulated depreciation	126		119
Net book value	433		442
Estimated useful life	'18 years		'18 years
Total Equipment [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	10,362		10,164
Accumulated depreciation	4,660		4,600
Net book value	5,702		5,564
Technology and Other [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	797		711
Accumulated depreciation	286		286
Net book value	511		425
Estimated useful life	'11 years		'10 years
Construction in Progress [Member]	'		'
Property, Plant and Equipment [Line Items]	'		'
Cost	898		954
Accumulated depreciation	0		0
Net book value	$898		$954
[1]	Other roadway includes grading, bridges and tunnels, signals, buildings, and other road assets.

Accounts_Payable_And_Other_Cur1

Accounts Payable And Other Current Liabilities (Details) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
In Millions, unless otherwise specified
Accounts Payable and Other Current Liabilities Details [Abstract]	'	'	'
Accounts payable	$888	$803	'
Income and other taxes payable	877	491	'
Dividends payable	407	356	318
Accrued wages and vacation	395	385	'
Accrued casualty costs	204	207	'
Interest payable	130	169	'
Equipment rents payable	101	96	'
Other current liabilities	554	579	'
Total accounts payable and other current liabilities	$3,556	$3,086	'

Financial_Instruments_Details

Financial Instruments (Details) (USD $)	3 Months Ended	12 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Fair Value of Financial Instruments [Abstract]	'	'
Fair value of total debt	$11,100	$10,200
Fair value of total debt in excess of carrying value	900	600
Debt securities containing call provisions	163	163
Interest Rate Cash Flow Hedges [Abstract]	'	'
Change in fair value of cash flow hedges as reported in accumulated other comprehensive loss	1	1
Interest rate cash flow hedges outstanding	$0	$0

Debt_Details_1

Debt (Details 1) (USD $)	3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014
Credit Facilities [Abstract]	'
Revolving credit facility available credit	$1,800
Revolving credit facility withdrawals	0
Compliance with covenant	'At March 31, 2014, and December 31, 2013 (and at all times during the first quarter), we were in compliance with this covenant.
Allowable debt per debt-to-net-worth coverage ratio (as defined in the facility)	43,000
Outstanding debt (as defined by facility)	10,500
Cross-default provision (as defined by facility)	75
Facility expiration date	25-May-15
Commercial paper outstanding	0
Commercial paper issued	0
Commercial paper repaid	$0

Debt_Details_2

Debt (Details 2) (USD $)	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Jan. 10, 2014	Mar. 31, 2014	Jan. 10, 2014	Mar. 31, 2014	Jan. 10, 2014
In Millions, unless otherwise specified			Unsecured Debt [Member]	Unsecured Debt [Member]	Unsecured Debt [Member]	Unsecured Debt [Member]	Unsecured Debt [Member]	Unsecured Debt [Member]
			2.25% Notes Due 2019 [Member]	2.25% Notes Due 2019 [Member]	3.75% Notes Due 2024 [Member]	3.75% Notes Due 2024 [Member]	4.85% Notes Due 2044 [Member]	4.85% Notes Due 2044 [Member]
Shelf Registration Statement and Significant New Borrowings [Abstract]	'	'	'	'	'	'	'	'
Issuance date	'	'	10-Jan-14	'	10-Jan-14	'	10-Jan-14	'
Note amount	'	'	'	$300	'	$400	'	$300
Maturity date on new borrowing	'	'	15-Feb-19	'	15-Mar-24	'	15-Jun-44	'
Interest rate on note	'	'	'	2.25%	'	3.75%	'	4.85%
Board of Directors remaining debt issuance	1,850	'	'	'	'	'	'	'
Receivables Securitization Facility Debt [Abstract]	'	'	'	'	'	'	'	'
Secured debt under receivables securitization facility	$0	$0	'	'	'	'	'	'

Variable_Interest_Entities_Det

Variable Interest Entities (Details) (USD $)	Mar. 31, 2014
In Billions, unless otherwise specified
Variable Interest Entities Details [Abstract]	'
Future minimum lease payments	$3.20

Commitments_And_Contingencies_1

Commitments And Contingencies (Details) (USD $)	3 Months Ended								3 Months Ended
In Millions, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2014	Dec. 31, 2013
			Personal Injury [Member]	Personal Injury [Member]	Asbestos [Member]	Asbestos [Member]	Environmental [Member]	Environmental [Member]	Guarantees [Member]	Guarantees [Member]
Liability Activity [Abstract]	'	'	'	'	'	'	'	'	'	'
Commitments and contingencies, beginning balance at January 1	'	'	$294	$334	$131	$139	'	'	'	'
Accruals	'	'	23	27	0	0	'	'	'	'
Changes in estimates for prior years	'	'	-6	-8	'	'	'	'	'	'
Payments	'	'	-17	-18	-2	-3	'	'	'	'
Commitments and contingencies, ending balance at March 31	'	'	294	335	129	136	'	'	'	'
Commitments and contingencies, current portion, ending balance at March 31	'	'	78	97	9	9	'	'	'	'
Environmental [Abstract]	'	'	'	'	'	'	'	'	'	'
Beginning balance at January 1	171	170	'	'	'	'	'	'	'	'
Accruals	6	7	'	'	'	'	'	'	'	'
Payments	-11	-11	'	'	'	'	'	'	'	'
Ending balance at March 31	166	166	'	'	'	'	'	'	'	'
Current portion, ending balance at March 31	52	50	'	'	'	'	'	'	'	'
Sites identified which we are or may be liable for remediation costs	269	'	'	'	'	'	'	'	'	'
Sites subject of actions taken by the U.S. government	31	'	'	'	'	'	'	'	'	'
Sites on the Superfund National Priorities List	17	'	'	'	'	'	'	'	'	'
Environmental liability discount rate	'	'	'	'	'	'	0.00%	0.00%	'	'
Guarantees [Abstract]	'	'	'	'	'	'	'	'	'	'
Maximum potential amount of guarantee payments	'	'	'	'	'	'	'	'	299	299
Recorded liability for fair value of guarantees	'	'	'	'	'	'	'	'	1	1
Expiration year of final guarantee	'	'	'	'	'	'	'	'	'The final guarantee expires in 2022.	'
Asserted And Unasserted Claims [Abstract]	'	'	'	'	'	'	'	'	'	'
Percent of liability recorded related to asserted claims	'	'	92.00%	'	20.00%	'	'	'	'	'
Percent of liability recorded related to unasserted claims	'	'	8.00%	'	80.00%	'	'	'	'	'
Reasonably possible outcome of related claims, range minimum	'	'	294	'	'	'	'	'	'	'
Reasonably possible outcome of related claims, range maximum	'	'	322	'	'	'	'	'	'	'
Future Minimum Lease Payments For Operating Leases [Abstract]	'	'	'	'	'	'	'	'	'	'
Total minimum operating lease payments	$4,000	'	'	'	'	'	'	'	'	'

Share_Repurchase_Program_Detai

Share Repurchase Program (Details) (USD $)	3 Months Ended
In Billions, except Share data, unless otherwise specified	Mar. 31, 2014	Mar. 31, 2013
Shares Repurchased [Abstract]	'	'
BOD authorized	60,000,000	'
Share repurchases (Note 16) (Shares)	3,820,000	2,881,400
Average purchase price	$178.85	$136.58
Remaining number of shares that may be repurchased under current authority	56,180,000	'
Stock repurchased since inception	$10	'