Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt

Schedule of short-term debt

	December 31,
($ in millions)	2015		2014
Short-term debt (weighted-average interest rate of 4.2% and 5.8%, respectively)		278		299
Current maturities of long-term debt (weighted-average nominal interest rate of 2.0% and 5.9%, respectively)		1,176		54
Total		1,454		353

Schedule of long-term debt

	December 31,
	2015									2014
($ in millions, except % data)	Balance			Nominal rate			Effective rate			Balance			Nominal rate			Effective rate
Floating rate		2,285			2.7	%		0.8	%		2,310			2.7	%		1.1	%
Fixed rate		4,876			3.2	%		3.2	%		5,056			3.2	%		3.2	%
		7,161									7,366
Current portion of long-term debt		(1,176	)		2.0	%		1.4	%		(54	)		5.9	%		5.9	%
Total		5,985									7,312

Schedule of principal amounts of long-term debt repayable at maturity

        At December 31, 2015, the principal amounts of long-term debt repayable (excluding capital lease obligations) at maturity were as follows:

	($ in millions)
2016		1,145
2017		823
2018		371
2019		1,381
2020		7
Thereafter		3,262
Total		6,989

Schedule of outstanding bonds

	December 31,
	2015					2014
		Nominal outstanding		Carrying value(1)			Nominal outstanding		Carrying value(1)
		(in millions)					(in millions)
Bonds:
2.5% USD Notes, due 2016	USD		600	$	599	USD		600	$	598
1.25% CHF Bonds, due 2016	CHF		500	$	510	CHF		500	$	511
1.625% USD Notes, due 2017	USD		500	$	499	USD		500	$	498
4.25% AUD Notes, due 2017	AUD		400	$	297	AUD		400	$	334
1.50% CHF Bonds, due 2018	CHF		350	$	352	CHF		350	$	351
2.625% EUR Instruments, due 2019	EUR		1,250	$	1,363	EUR		1,250	$	1,515
4.0% USD Notes, due 2021	USD		650	$	641	USD		650	$	640
2.25% CHF Bonds, due 2021	CHF		350	$	383	CHF		350	$	378
5.625% USD Notes, due 2021	USD		250	$	279	USD		250	$	283
2.875% USD Notes, due 2022	USD		1,250	$	1,275	USD		1,250	$	1,271
4.375% USD Notes, due 2042	USD		750	$	722	USD		750	$	721
Total				$	6,920				$	7,100

(1) USD carrying values include unamortized debt issuance costs, bond discounts or premiums, as well as adjustments for fair value hedge accounting, where appropriate.