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Fair Value Disclosure
6 Months Ended
Jun. 30, 2020
Fair Value Disclosures [Abstract]  
Fair Value Disclosure Fair Value Disclosure
Our financial instruments consist of cash and cash equivalents, restricted cash, accounts receivable, advances to affiliates, accounts payable, note payable-affiliate and long-term debt, excluding finance lease and other obligations. Due to their short-term nature, the carrying amounts of our cash, cash equivalents and restricted cash, accounts receivable, advances to affiliates, accounts payable and note payable-affiliate approximate their fair values.

The three input levels in the hierarchy of fair value measurements are defined by the Fair Value Measurement and Disclosure framework generally as follows:
Input LevelDescription of Input
Level 1Observable inputs such as quoted market prices in active markets.
Level 2Inputs other than quoted prices in active markets that are either directly or indirectly observable.
Level 3Unobservable inputs in which little or no market data exists.
The following table presents the carrying amounts and estimated fair values of our long-term debt, excluding finance lease and other obligations, as well as the input level used to determine the fair values indicated below:
  June 30, 2020December 31, 2019
 Input
Level
Carrying
Amount
Fair
Value
Carrying
Amount
Fair
Value
  (Dollars in millions)
Liabilities—Long-term debt (excluding finance lease and other obligations)2$4,653  4,609  5,941  6,258