Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Business Acquisitions) (Details) (USD $)	3 Months Ended		6 Months Ended		3 Months Ended		6 Months Ended	9 Months Ended	12 Months Ended			6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Goodrich Corporation [Member]	Mar. 31, 2013 Goodrich Corporation [Member]	Jun. 30, 2013 Goodrich Corporation [Member]	Sep. 30, 2012 Goodrich Corporation [Member]	Dec. 31, 2011 Goodrich Corporation [Member]	Jul. 01, 2012 Goodrich Corporation [Member]	Jun. 30, 2013 International Aero Engines AG [Member]	Jun. 30, 2013 Group Ascensores Enor SA [Member]	Jun. 30, 2013 Pratt and Whitney Power Systems [Member]
Notes to Condensed Consolidated Financial Statements [Abstract]
Business Acquisitions Pro Forma Net Sales		$ 15,802,000,000		$ 30,218,000,000
Business Acquisition [Line Items]
Business Acquisition Date Of Acquisition Agreement							Jul. 26, 2012
Business Acquisition Cash Paid Per Share							$ 127.5
Business Acquisition Cost Of Acquired Entity Purchase Price					18,300,000,000		18,300,000,000				1,500,000,000
Noncash or Part Noncash Acquisition, Net Debt Assumed					1,900,000,000		1,900,000,000
Business Acquisition Revenue Reported By Acquired Entity For Last Annual Period									8,100,000,000			50,000,000
Business Acquisition Effective Date Of Acquisition			Jul. 01, 2012									Feb. 07, 2013
Business Acquisition Purchase Price Allocation Environmental Liabilities Assumed	325,000,000		325,000,000		325,000,000		325,000,000
Business Acquisition Preexisting Relationship Gain Loss Recognized										46,000,000
Proceeds From Issuance Of Commercial Paper							3,200,000,000
Short-term Debt, Loan Maximum Borrowing Capacity							2,000,000,000
Short-Term Debt Instrument, Agreement Date							Apr. 24, 2012
Cash and Cash Equivalents Used in Business Acquisition					500,000,000		500,000,000
Business Acquisition, Purchase Price Allocation, Management Continuity Arrangement Liabilities Assumed					74,000,000		74,000,000
Business Acquisition, Cost of Management Continuity Arrangements Amendment					9,000,000			12,000,000
Business Acquisition, Unremitted Foreign Earnings Income Tax Liability									853,000,000
Business Acquisition Purchase Price Allocation Deferred Income Tax Liability					219,000,000		219,000,000
Payments to Acquire Businesses, Net of Cash Acquired												240,000,000
Debt Instrument, Utilization of Net Proceeds					9,600,000,000		9,600,000,000
Debt Instrument, Total Face Amount Issued					9,800,000,000		9,800,000,000
Proceeds From Issuance Equity Units					1,100,000,000		1,100,000,000
Equity Issuance, Date							Jun. 18, 2012
Maximum Commercial Paper Borrowing Authority	4,000,000,000		4,000,000,000
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	1,653,000,000	1,422,000,000	3,001,000,000	1,829,000,000
Aggregate Line of Credit Facility Maximum Borrowing Capacity	4,000,000,000		4,000,000,000
Acquisition Cost Of Acquired Entities and Interest in Affiliates			66,000,000
Disposal Date													May 17, 2013
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	(25,000,000)	(31,000,000)	(40,000,000)	(36,000,000)									193,000,000
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax													132,000,000
Proceeds from Divestiture of Businesses													432,000,000
Business Combination, Contingent Consideration, Asset													200,000,000
Contractual Obligation, Consumed in Current Year					71,000,000		150,000,000
Contractual Obligation Due in Remainder of Fiscal Year					134,000,000		134,000,000
Contractual Obligation, Due in Next Twelve Months					286,000,000		286,000,000
Contractual Obligation, Due in Second Year					218,000,000		218,000,000
Contractual Obligation, Due in Third Year					239,000,000		239,000,000
Contractual Obligation, Due in Fourth Year					236,000,000		236,000,000
Contractual Obligation, Due after Fifth Year					873,000,000		873,000,000
Proceeds from Sales of Business, Affiliate and Productive Assets						600,000,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax		$ 1,542,000,000		$ 2,830,000,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic		$ 1.73		$ 3.17
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted		$ 1.70		$ 3.13