XML 24 R14.htm IDEA: XBRL DOCUMENT v3.19.1
Fair Value Disclosure
3 Months Ended
Mar. 31, 2019
Fair Value Disclosures [Abstract]  
Fair Value Disclosure
Fair Value Disclosure

The Fair Value Measurement and Disclosure framework provides a three-tiered fair value hierarchy based on the reliability of the inputs used to determine fair value. Input Level 1 refers to fair values determined based on quoted prices in active markets for identical assets. Input Level 2 refers to fair values estimated using significant other observable inputs and Input Level 3 includes fair values estimated using significant unobservable inputs.

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:
 
 
 
March 31, 2019
 
December 31, 2018
 
Input
Level
 
Carrying
Amount
 
Fair
Value
 
Carrying
Amount
 
Fair
Value
 
 
 
(Dollars in millions)
Liabilities—Long-term debt (excluding finance lease and other obligations)
2
 
$
5,939

 
5,885

 
5,938

 
5,118