Long-Term Debt (Tables)

6 Months Ended

Jun. 30, 2017

Debt Disclosure [Abstract]

Long-Term Debt

We provide detail on our long-term debt balances, net of discounts, premiums, and debt issuance costs, in the following table at the end of the 2017 second quarter and year-end 2016:

	At Period End
($ in millions)	June 30, 2017			December 31, 2016
Senior Notes:
Series I Notes, interest rate of 6.4%, face amount of $293, matured June 15, 2017 (effective interest rate of 6.5%)	$	—		$	293
Series K Notes, interest rate of 3.0%, face amount of $600, maturing March 1, 2019 (effective interest rate of 4.4%)	597			597
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%)	396			396
Series O Notes, interest rate of 2.9%, face amount of $450, maturing March 1, 2021 (effective interest rate of 3.1%)	447			446
Series P Notes, interest rate of 3.8%, face amount of $350, maturing October 1, 2025 (effective interest rate of 4.0%)	344			344
Series Q Notes, interest rate of 2.3%, face amount of $750, maturing January 15, 2022 (effective interest rate of 2.5%)	743			742
Series R Notes, interest rate of 3.1%, face amount of $750, maturing June 15, 2026 (effective interest rate of 3.3%)	742			742
Series S Notes, interest rate of 6.8%, face amount of $324, maturing May 15, 2018 (effective interest rate of 1.7%)	338			346
Series T Notes, interest rate of 7.2%, face amount of $181, maturing December 1, 2019 (effective interest rate of 2.3%)	201			206
Series U Notes, interest rate of 3.1%, face amount of $291, maturing February 15, 2023 (effective interest rate of 3.1%)	291			291
Series V Notes, interest rate of 3.8%, face amount of $318, maturing March 15, 2025 (effective interest rate of 2.8%)	339			340
Series W Notes, interest rate of 4.5%, face amount of $278, maturing October 1, 2034 (effective interest rate of 4.1%)	293			293
Commercial paper	2,431			2,311
Credit Facility	—			—
Capital lease obligations	173			173
Other	283			291
	8,313			8,506
Less: Current portion of long-term debt	(402		)	(309		)
	$	7,911		$	8,197