Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2017

Debt Disclosure [Abstract]

Long-term debt

Long-term debt consists of the following:

$ in millions		December 31
		2017			2016
Fixed-rate notes and debentures, maturing in	Interest rate
2018	1.75%	850			850
2019	5.05%	500			500
2020	2.08%	1,000			—
2021	3.50%	700			700
2022	2.55%	1,500			—
2023	3.25%	1,050			1,050
2025	2.93%	1,500			—
2026	7.75% - 7.88%	527			527
2027	3.20%	750			750
2028	3.25%	2,000			—
2031	7.75%	466			466
2040	5.05%	300			300
2043	4.75%	950			950
2045	3.85%	600			600
2047	4.03%	2,250			—
Credit facilities	1.62%	134			135
Other	Various	271			273
Debt issuance costs		(82		)	(31		)
Total long-term debt		15,266			7,070
Less: current portion(1)		867			12
Long-term debt, net of current portion		$	14,399		$	7,058

Long-term debt maturities

Maturities of long-term debt as of December 31, 2017, are as follows:

$ in millions
Year Ending December 31
2018	$	867
2019	518
2020	1,045
2021	834
2022	1,505
Thereafter	10,581
Total principal payments	15,350
Unamortized premium on long-term debt, net of discount	(2		)
Debt issuance costs	(82		)
Total long-term debt	$	15,266