Long-Term Debt (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Long-term debt

Long-term debt consists of the following:

$ in millions		December 31
		2015		2014
Fixed-rate notes and debentures, maturing in	Interest rate
2016	7.75%	$	107	$	107
2018	1.75% - 6.75%	1,050		1,050
2019	5.05%	500		500
2021	3.50%	700		700
2023	3.25%	1,050		1,050
2026	7.75% - 7.88%	527		527
2031	7.75%	466		466
2040	5.05%	300		300
2043	4.75%	950		950
2045	3.85%	600		—
Capital leases	Various	31		33
Other	Various	245		245
Total long-term debt		6,526		5,928
Less: current portion		110		3
Long-term debt, net of current portion		$	6,416	$	5,925

Long-term debt maturities

Maturities of long-term debt as of December 31, 2015, are as follows:

$ in millions
Year Ending December 31
2016	$	110
2017	3
2018	1,053
2019	504
2020	31
Thereafter	4,822
Total principal payments	6,523
Unamortized premium on long-term debt, net of discount	3
Total long-term debt	$	6,526