A summary of long-term debt at September 30, 2019 and December 31, 2018, including related interest rates at September 30, 2019, follows (dollars in millions):


	September 30, 2019			December 31, 2018
Senior secured asset-based revolving credit facility (effective interest rate of 3.3%)	$	3,010		$	3,040
Senior secured revolving credit facility		—			—
Senior secured term loan facilities (effective interest rate of 3.5%)		3,739			3,801
Senior secured notes (effective interest rate of 5.1%)		13,850			13,800
Other senior secured debt (effective interest rate of 5.5%)		638			585

Senior secured debt		21,237			21,226
Senior unsecured notes (effective interest rate of 6.3%)		13,252			11,752
Debt issuance costs and discounts		(244	)		(157	)

Total debt (average life of 8.7 years, rates averaging 5.2%)		34,245			32,821
Less amounts due within one year		148			788

	$	34,097		$	32,033

During January 2019, we issued $1.500 billion aggregate principal amount of senior unsecured notes comprised of $1.000 billion aggregate principal amount of 5.875% notes due 2029 and $500 million aggregate principal amount of 5.625% notes due 2028. We used the net proceeds to fund the purchase of a seven-hospital health system located in western North Carolina.

During June 2019, we issued $5.000 billion aggregate principal amount of senior secured notes comprised of $2.000 billion aggregate principal amount of 4 1/8% notes due 2029, $1.000 billion aggregate principal amount of 5 1/8% notes due 2039 and $2.000 billion aggregate principal amount of 5 1/4% notes due 2049. During July 2019, we redeemed all $600 million outstanding aggregate principal amount of 4.250% senior secured notes due 2019, all $3.000 billion outstanding aggregate principal amount of 6.500% senior secured notes due 2020 and all $1.350 billion outstanding aggregate principal amount of 5.875% senior secured notes due 2022. The pretax loss on retirement of debt for these redemptions was $211 million.