Long-Term Debt (Tables)

3 Months Ended

Mar. 31, 2016

Debt Disclosure [Abstract]

Long-Term Debt

We provide detail on our long-term debt balances in the following table as of the end of the 2016first quarter and year-end 2015:

	At Period End
($ in millions)	March 31, 2016			December 31, 2015
Senior Notes:
Series H Notes, interest rate of 6.2%, face amount of $289, maturing June 15, 2016 (effective interest rate of 6.3%)	289			289
Series I Notes, interest rate of 6.4%, face amount of $293, maturing June 15, 2017 (effective interest rate of 6.5%)	293			293
Series K Notes, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 (effective interest rate of 4.4%)	596			595
Series L Notes, interest rate of 3.3%, face amount of $350, maturing September 15, 2022 (effective interest rate of 3.4%)	348			348
Series M Notes, interest rate of 3.4%, face amount of $350, maturing October 15, 2020 (effective interest rate of 3.6%)	347			347
Series N Notes, interest rate of 3.1%, face amount of $400, maturing October 15, 2021 (effective interest rate of 3.4%)	395			395
Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 (effective interest rate of 3.1%)	446			446
Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%)	343			343
Commercial paper, average interest rate of 0.8% at March 31, 2016	991			938
$2,000 Credit Facility	—			—
Other	111			113
	4,159			4,107
Less: Current portion of long-term debt	(300		)	(300		)
	$	3,859		$	3,807

Debt Principal Payments (Net of Unamortized Discounts)

The following table presents future principal payments that are due for our debt as of the end of the 2016first quarter:

Debt Principal Payments (net of unamortized discounts) ($ in millions)	Amount
2016	$	298
2017	302
2018	1,000
2019	606
2020	358
Thereafter	1,595
Balance at March 31, 2016	$	4,159