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

We paid cash for interest, net of amounts capitalized, of $123 million in the 2017 first half and $65 million in the 2016 first half.

We are party to a multicurrency revolving credit agreement (the “Credit Facility”) that provides for up to $4,000 million of aggregate effective borrowings. See the “Cash Requirements and Our Credit Facility” caption later in this report in the “Liquidity and Capital Resources” section for further information on our Credit Facility and available borrowing capacity at June 30, 2017.