A summary of long-term debt at June 30, 2022 and December 31, 2021, including related interest rates at June 30, 2022, follows (dollars in millions):


	June 30, 2022			December 31, 2021
Senior secured asset-based revolving credit facility (effective interest rate of 2.6%)	$	3,710		$	2,780
Senior secured revolving credit facility		—			—
Senior secured term loan facilities (effective interest rate of 3.2%)		1,920			1,960
Senior secured notes		—			16,200
Other senior secured debt (effective interest rate of 4.0%)		937			935
Senior secured debt		6,567			21,875
Senior unsecured notes (effective interest rate of 4.9%)		32,652			12,952
Debt issuance costs and discounts		(316	)		(248	)
Total debt (average life of 10.0 years, rates averaging 4.6%)		38,903			34,579
Less amounts due within one year		246			237
	$	38,657		$	34,342

During March 2022, we issued $6.000 billion aggregate principal amount of senior secured notes comprised of (i) $1.000 billion aggregate principal amount of 3 1/8% senior secured notes due 2027, (ii) $500 million aggregate principal amount of 3 3/8% senior secured notes due 2029, (iii) $2.000 billion aggregate principal amount of 3 5/8% senior secured notes due 2032, (iv) $500 million aggregate principal amount of 4 3/8% senior secured notes due 2042 and (v) $2.000 billion aggregate principal amount of 4 5/8% senior secured notes due 2052. During March 2022, we used a portion of the net proceeds to pay down our revolving credit facilities. During April 2022, we redeemed all $1.250 billion outstanding aggregate principal amount of our 4.75% senior secured notes due 2023. During May 2022, we redeemed all $1.250 billion outstanding aggregate principal amount of our 5.875% senior notes due 2023. The aggregate pretax loss on retirement of debt for these two redemptions was $78 million.

During May 2022, Standard & Poor's Rating Services ("S&P") announced it had issued an investment grade rating with respect to the issuer credit rating of HCA Healthcare, Inc. and its subsidiaries. S&P's announcement, in conjunction with the Moody's Investors Service, Inc. upgrade in 2021, permitted the permanent release of the subsidiary guarantees and all collateral securing our senior secured notes. As a result of these releases, the senior secured notes are now classified as senior unsecured notes. The subsidiary guarantees and collateral securing our senior secured credit facilities are not affected.