Acquisitions, Dispositions, Goodwill and Other Intangible Assets (Business Acquisitions) (Details) (USD $)	3 Months Ended		9 Months Ended		3 Months Ended			9 Months Ended		12 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013 Goodrich Corporation [Member]	Jun. 30, 2013 Goodrich Corporation [Member]	Mar. 31, 2013 Goodrich Corporation [Member]	Sep. 30, 2013 Goodrich Corporation [Member]	Sep. 30, 2012 Goodrich Corporation [Member]	Dec. 31, 2011 Goodrich Corporation [Member]	Sep. 30, 2013 International Aero Engines AG [Member]	Sep. 30, 2013 Group Ascensores Enor SA [Member]	Sep. 30, 2013 Pratt and Whitney Power Systems [Member]
Notes to Condensed Consolidated Financial Statements [Abstract]
Business Acquisitions Pro Forma Net Sales		$ 15,512,000,000		$ 45,730,000,000
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											Jun. 29, 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					215,000,000			215,000,000
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
Acquisition Cost Of Acquired Entities and Interest in Affiliates			120,000,000
Disposal Date													May 17, 2013
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax	10,000,000	(26,000,000)	(30,000,000)	(62,000,000)									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					60,000,000			210,000,000
Contractual Obligation Due in Remainder of Fiscal Year					70,000,000			70,000,000
Contractual Obligation, Due in Next Twelve Months					274,000,000			274,000,000
Contractual Obligation, Due in Second Year					213,000,000			213,000,000
Contractual Obligation, Due in Third Year					242,000,000			242,000,000
Contractual Obligation, Due in Fourth Year					233,000,000			233,000,000
Contractual Obligation, Due after Fifth Year					894,000,000			894,000,000
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		$ 1,315,000,000		$ 4,145,000,000
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Basic		$ 1.47		$ 4.63
Business Acquisition, Pro Forma Income (Loss) from Continuing Operations before Changes in Accounting and Extraordinary Items, Net of Tax, Per Share, Diluted		$ 1.45		$ 4.57