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Fair Value Measurements (Tables)
6 Months Ended
Jun. 30, 2023
Fair Value Disclosures [Abstract]  
Fair value of financial instruments The estimated fair values of our other financial instruments, all of which are categorized in Level 1 of the fair value hierarchy, as of June 30, 2023 and December 31, 2022 have been calculated based upon available market information, and were as follows: 
 June 30, 2023December 31, 2022
 Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
Senior notes$7,717 $7,228 $7,712 $7,143