Borrowings and Lines of Credit (Long-Term Debt) (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2013		Dec. 31, 2012
Notes to Condensed Consolidated Financial Statements [Abstract]
Other Long-term Debt	$ 436	[1]	$ 403	[1]
Principal Long-Term Debt	21,169		22,365
Other Long-Term Debt Fair Market Value Adjustments	291	[1]	353	[1]
Total long-term debt	21,460		22,718
Long-term Debt and Capital Lease Obligations, Current	1,085		1,121
Debt Instrument [Line Items]
Other Loans Payable	73		100
Subsequent Event, Description	On July 24, 2013, we called for redemption of all outstanding 6.125% notes due March 1, 2019 issued by Goodrich, representing approximately $202 million in aggregate principal, to be redeemed in August 2013. These Goodrich notes are being refinanced to achieve future interest savings.
Debt Instrument London Interbank Offered Rate	0.30%
June 2013 Redemption Call [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Announcement Date	Jun. 24, 2013
Gains (Losses) on Extinguishment of Debt	6
May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Announcement Date	May 07, 2013
Extinguishment of Debt, Terms	Holders validly tendering their notes by May 21, 2013 received consideration determined by reference to a fixed spread over the yield to maturity of the applicable U.S. Treasury security with the same maturity as the note being tendered, plus an early tender payment of $50 per $1,000 principal amount of notes accepted for purchase. Holders validly tendering their notes after May 21, 2013 but prior to June 4, 2013 received consideration determined by reference to a fixed spread over the yield to maturity of the applicable U.S. Treasury security with the same maturity as the notes being tendered.
Extinguishment of Debt, Expiration Date	Jun. 04, 2013
Gains (Losses) on Extinguishment of Debt	18
December 2012 Tender Offer [Member]
Debt Instrument [Line Items]
Gains (Losses) on Extinguishment of Debt			26
Extinguishment of Debt, Payment Date	Jan. 08, 2013
LIBOR Plus 0.270% Floating Rate Notes Due 2013 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000	[2]	1,000	[2]
Debt Instrument, Call Feature	§ The three-month LIBOR rate as of March 31, 2013 was approximately 0.3%.
Debt Instrument Maturity Date Description	2013
Debt Instrument, Interest Rate Terms	LIBOR plus 0.270%
LIBOR Plus 0.500% Floating Rate Notes Due 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	500	[2]	500	[2]
Debt Instrument, Call Feature	§ The three-month LIBOR rate as of March 31, 2013 was approximately 0.3%.
Debt Instrument Maturity Date Description	2015
Debt Instrument, Interest Rate Terms	LIBOR plus 0.500%
Notes 1.200% Due 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	0	[3]	1,000	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2015
Debt Instrument, Interest Rate, Stated Percentage	1.20%
Notes 1.200% Due 2015 [Member] | June 2013 Redemption Call [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	327
Notes 1.200% Due 2015 [Member] | May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	674
Notes 4.875% Due 2015 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,200	[3]	1,200	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2015
Debt Instrument, Interest Rate, Stated Percentage	4.875%
Notes 6.290% Due 2016 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	188	[1]	291	[1]
Debt Instrument, Call Feature	‡ Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2016
Debt Instrument, Interest Rate, Stated Percentage	6.29%
Notes 6.290% Due 2016 [Member] | May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	103
Notes 5.375% Due 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000	[3]	1,000	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2017
Debt Instrument, Interest Rate, Stated Percentage	5.375%
Notes 1.800% Due 2017 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,500	[3]	1,500	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2017
Debt Instrument, Interest Rate, Stated Percentage	1.80%
Notes 6.800% Due 2018 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	99	[1]	99	[1]
Debt Instrument, Call Feature	‡ Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2018
Debt Instrument, Interest Rate, Stated Percentage	6.80%
Notes 6.125% Due 2019*** [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	202	[1]	300	[1]
Debt Instrument, Call Feature	‡ Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2019
Debt Instrument, Interest Rate, Stated Percentage	6.125%
Notes 6.125% Due 2019*** [Member] | May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	98
Notes 6.125% Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,250	[3]	1,250	[3]
Debt Instrument, Call Feature	* We may redeem some or all of these series of notes at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount outstanding of the applicable series of notes to be redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the applicable series of notes to be redeemed. The discounts applied on such redemptions are based on a semiannual calculation at an adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2019
Debt Instrument, Interest Rate, Stated Percentage	6.125%
Notes 8.875% Due 2019 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	272		272
Debt Instrument Maturity Date Description	2019
Debt Instrument, Interest Rate, Stated Percentage	8.875%
Notes 4.500% Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,250	[3]	1,250	[3]
Debt Instrument, Call Feature	* We may redeem some or all of these series of notes at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount outstanding of the applicable series of notes to be redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the applicable series of notes to be redeemed. The discounts applied on such redemptions are based on a semiannual calculation at an adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2020
Debt Instrument, Interest Rate, Stated Percentage	4.50%
Notes 4.875% Due 2020 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	171	[1]	171	[1]
Debt Instrument, Call Feature	‡ Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2020
Debt Instrument, Interest Rate, Stated Percentage	4.875%
Notes 3.600% Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	294	[1]	295	[1]
Debt Instrument, Call Feature	‡ Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2021
Debt Instrument, Interest Rate, Stated Percentage	3.60%
Notes 8.750% Due 2021 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	250		250
Debt Instrument Maturity Date Description	2021
Debt Instrument, Interest Rate, Stated Percentage	8.75%
Notes 3.100% Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	2,300	[3]	2,300	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2022
Debt Instrument, Interest Rate, Stated Percentage	3.10%
Junior Subordinated Notes 1.550% Due 2022 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,100	[4]	1,100	[4]
Debt Instrument, Call Feature	† The junior subordinated notes are redeemable at our option, in whole or in part, on a date not earlier than August 1, 2017. The redemption price will be the principal amount, plus accrued and unpaid interest, if any, up to but excluding the redemption date. We may extend or eliminate the optional redemption date as part of a remarketing of the junior subordinated notes which could occur between April 29, 2015 and July 15, 2015 or between July 23, 2015 and July 29, 2015.
Debt Instrument Maturity Date Description	2022
Debt Instrument, Interest Rate, Stated Percentage	1.55%
Notes 7.100% Due 2027 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	141	[1]	141	[1]
Debt Instrument, Call Feature	‡ Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2027
Debt Instrument, Interest Rate, Stated Percentage	7.10%
Notes 6.700% Due 2028 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	400		400
Debt Instrument Maturity Date Description	2028
Debt Instrument, Interest Rate, Stated Percentage	6.70%
Notes 7.500% Due 2029 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	550	[3]	550	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2029
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Notes 5.400% Due 2035 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	600	[3]	600	[3]
Debt Instrument, Call Feature	* We may redeem some or all of these series of notes at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount outstanding of the applicable series of notes to be redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the applicable series of notes to be redeemed. The discounts applied on such redemptions are based on a semiannual calculation at an adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2035
Debt Instrument, Interest Rate, Stated Percentage	5.40%
Notes 6.050% Due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	600	[3]	600	[3]
Debt Instrument, Call Feature	* We may redeem some or all of these series of notes at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount outstanding of the applicable series of notes to be redeemed, or the sum of the present values of the remaining scheduled payments of principal and interest on the applicable series of notes to be redeemed. The discounts applied on such redemptions are based on a semiannual calculation at an adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2036
Debt Instrument, Interest Rate, Stated Percentage	6.05%
Notes 6.800% Due 2036 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	134	[1]	134	[1]
Debt Instrument, Call Feature	‡ Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2036
Debt Instrument, Interest Rate, Stated Percentage	6.80%
Notes 7.000% Due 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	159	[1]	159	[1]
Debt Instrument, Call Feature	‡ Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.
Debt Instrument Maturity Date Description	2038
Debt Instrument, Interest Rate, Stated Percentage	7.00%
Notes 6.125% Due 2038 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000	[3]	1,000	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2038
Debt Instrument, Interest Rate, Stated Percentage	6.125%
Notes 5.700% Due 2040 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	1,000	[3]	1,000	[3]
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2040
Debt Instrument, Interest Rate, Stated Percentage	5.70%
Notes 4.500% Due 2042 [Member]
Debt Instrument [Line Items]
Debt Instrument, Carrying Amount	3,500	[3]	3,500
Debt Instrument, Call Feature	* We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.
Debt Instrument Maturity Date Description	2042
Debt Instrument, Interest Rate, Stated Percentage	4.50%
Long-term Debt [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	2
Long-term Debt [Member] | May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	874
Long-term Debt [Member] | December 2012 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	637		635
Debt Fair Value Adjustment [Member] | May 2013 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	36
Debt Fair Value Adjustment [Member] | December 2012 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount	$ 126
December 2012 Tender Offer [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Announcement Date	Dec. 06, 2012
Extinguishment of Debt, Expiration Date	Jan. 07, 2013

[1] Includes notes and remaining fair market value adjustments that were assumed as a part of the Goodrich acquisition on July 26, 2012.

[2] The three-month LIBOR rate as of June 30, 2013 was approximately 0.3%

[3] We may redeem the above notes, in whole or in part, at our option at any time at a redemption price in U.S. Dollars equal to the greater of 100% of the principal amount of the notes to be redeemed or the sum of the present values of the remaining scheduled payments of principal and interest on the notes to be redeemed, discounted to the redemption date on a semiannual basis at the adjusted treasury rate plus 10-50 basis points. The redemption price will also include interest accrued to the date of redemption on the principal balance of the notes being redeemed.

[4] The junior subordinated notes are redeemable at our option, in whole or in part, on a date not earlier than August 1, 2017. The redemption price will be the principal amount, plus accrued and unpaid interest, if any, up to but excluding the redemption date. We may extend or eliminate the optional redemption date as part of a remarketing of the junior subordinated notes which could occur between April 29, 2015 and July 15, 2015 or between July 23, 2015 and July 29, 2015.