The following table summarizes the terms of such revolving credit facilities as of December 31, 2015:

			TDS			U.S. Cellular
(Dollars in millions)
Maximum borrowing capacity			$	400.0		$	300.0
Letters of credit outstanding			$	0.6		$	17.5
Amount borrowed			$	–		$	–
Amount available for use			$	399.4		$	282.5
Illustrative borrowing rate: One-month London Interbank Offered
	Rate ("LIBOR") plus contractual spread1			2.18	%		2.18	%
	Illustrative LIBOR Rate			0.43	%		0.43	%
	Contractual spread			1.75	%		1.75	%
Commitment fees on amount available for use2				0.30	%		0.30	%

Agreement date				Dec 2010			Dec 2010
Maturity date				Dec 2017			Dec 2017

Fees incurred attributable to the Revolving Credit Facility are as follows:
	Fees incurred as a percent of Maximum borrowing capacity for 2015			0.33	%		0.29	%
	Fees incurred, amount
		2015	$	1.3		$	0.9
		2014	$	0.9		$	3.0
		2013	$	0.9		$	0.8

1		Borrowings under the revolving credit facility bear interest at LIBOR plus a contractual spread based on TDS' or U.S. Cellular’s credit rating or, at TDS' or U.S. Cellular’s option, an alternate “Base Rate” as defined in the revolving credit agreement. TDS and U.S. Cellular may select a borrowing period of either one, two, three or six months (or other period of twelve months or less if requested by TDS or U.S. Cellular and approved by the lenders).

2		The revolving credit facility has commitment fees based on the unsecured senior debt ratings assigned to TDS and U.S. Cellular by certain ratings agencies.

Long-term debt as of December 31, 2015 and 2014 was as follows:

								December 31,
								2015						2014
				Issuance date	Maturity date	Call date		Principal Amount		Less Unamortized discount and debt issuance costs		Total		Principal Amount		Less Unamortized discount and debt issuance costs	Total
(Dollars in thousands)
TDS:
		Unsecured Senior Notes
		6.625%		March 2005	March 2045	March 2010	$	116,250	$	3,567	$	112,683	$	116,250	$	3,604	$	112,646
		6.875%		Nov 2010	Nov 2059	Nov 2015		225,000		7,537		217,463		225,000		7,561		217,439
		7.000%		March 2011	March 2060	March 2016		300,000		9,621		290,379		300,000		9,650		290,350
		5.875%		Nov 2012	Dec 2061	Dec 2017		195,000		6,718		188,282		195,000		6,744		188,256
	Purchase contract			Oct 2001	Oct 2021			1,097		–		1,097		1,097		–		1,097
			Total Parent					837,347		27,443		809,904		837,347		27,559		809,788
Subsidiaries:
	U.S. Cellular -
		Unsecured Senior Notes
		6.700%		Dec 2003 and June 2004	Dec 2033	Dec 2003		544,000		15,247		528,753		544,000		15,656		528,344
		6.950%		May 2011	May 2060	May 2016		342,000		10,905		331,095		342,000		10,937		331,063
		7.250%		Dec 2014	Dec 2063	Dec 2019		275,000		9,629		265,371		275,000		9,644		265,356
		7.250%		Nov 2015	Nov 2064	Nov 2020		300,000		10,316		289,684		–		–		–
		Term Loan		Jan 2015	Jan 2022			225,000		2,283		222,717		–		–		–
		Obligation on capital leases						2,200		–		2,200		2,143		–		2,143
	TDS Telecom -
		Rural Utilities Service (“RUS”) and other notes						691				691		699				699
		Obligation on capital leases						733		–		733		767		–		767
	Other -
		Long-term notes			Through 2016			2,961		–		2,961		3,686		–		3,686
		Obligation on capital leases						24				24		31		–		31
			Total Subsidiaries					1,692,609		48,380		1,644,229		1,168,326		36,237		1,132,089
Total long-term debt							$	2,529,956	$	75,823	$	2,454,133	$	2,005,673	$	63,796	$	1,941,877
		Long-term debt, current									$	14,306					$	808
		Long-term debt, noncurrent									$	2,439,827					$	1,941,069