Borrowings and Lines of Credit (Tables)

9 Months Ended

Sep. 30, 2017

Debt Disclosure [Abstract]

Schedule of Short-Term Debt [Table Text Block]

(Dollars in millions)	September 30, 2017		December 31, 2016
Commercial paper	$	943	$	522
Other borrowings	134		79
Total short-term borrowings	$	1,077	$	601

Schedule of Long-term Debt [Table Text Block]

Long-term debt consisted of the following:

(Dollars in millions)	September 30, 2017			December 31, 2016
1.800% notes due 2017 1	$	—		$	1,500
6.800% notes due 2018	99			99
EURIBOR plus 0.800% floating rate notes due 2018 (€750 million principal value) 2	890			783
1.778% junior subordinated notes due 2018	1,100			1,100
LIBOR plus 0.350% floating rate notes due 2019 3	350			350
1.500% notes due 2019 1	650			650
8.875% notes due 2019	271			271
4.875% notes due 2020 1	171			171
4.500% notes due 2020 1	1,250			1,250
1.900% notes due 2020 1	1,000			—
8.750% notes due 2021	250			250
1.950% notes due 2021 1	750			750
1.125% notes due 2021 (€950 million principal value) 1	1,128			992
2.300% notes due 2022 1	500			—
3.100% notes due 2022 1	2,300			2,300
1.250% notes due 2023 (€750 million principal value) 1	890			783
2.800% notes due 2024 1	800			—
1.875% notes due 2026 (€500 million principal value) 1	594			522
2.650% notes due 2026 1	1,150			1,150
3.125% notes due 2027 1	1,100			—
7.100% notes due 2027	141			141
6.700% notes due 2028	400			400
7.500% notes due 2029 1	550			550
5.400% notes due 2035 1	600			600
6.050% notes due 2036 1	600			600
6.800% notes due 2036 1	134			134
7.000% notes due 2038	159			159
6.125% notes due 2038 1	1,000			1,000
5.700% notes due 2040 1	1,000			1,000
4.500% notes due 2042 1	3,500			3,500
4.150% notes due 2045 1	850			850
3.750% notes due 2046 1	1,100			1,100
4.050% notes due 2047 1	600			—
Project financing obligations	137			155
Other (including capitalized leases)	195			189
Total principal long-term debt	26,209			23,299
Other (fair market value adjustments and discounts)	(26		)	1
Total long-term debt	26,183			23,300
Less: current portion	2,120			1,603
Long-term debt, net of current portion	$	24,063		$	21,697

1 We may redeem these notes at our option pursuant to their terms.

2 The three-month EURIBOR rate as of September 30, 2017 was approximately -0.329%. The notes may be redeemed at our option in whole, but not in part, at any time in the event of certain developments affecting U.S. taxation.

3 The three-month LIBOR rate as of September 30, 2017 was approximately 1.334%.

Schedule of Weighted average interest rates [Table Text Block]

The average interest expense rate on our total borrowings for the quarters and nine months ended September 30, 2017 and 2016 was as follows:

	Quarter Ended September 30,				Nine Months Ended September 30,
	2017		2016		2017		2016
Average interest expense rate	3.6	%	4.0	%	3.6	%	4.1	%