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Financial Instruments
3 Months Ended
Jun. 30, 2014
Fair Value Disclosures [Abstract]  
Financial Instruments
Note 5.
Financial Instruments
Cash and cash equivalents, accounts and notes receivable, and accounts payable are carried at cost, which approximates fair value. Short-term investments (consisting primarily of time deposits, commercial paper, and U.S. Treasury securities), totaling approximately $1.3 billion and $1.2 billion as of the Successor periods ended June 30, 2014 and March 31, 2014, respectively, are recorded at amortized cost, and the respective carrying amounts approximate fair value using quoted prices in active markets. The fair value of marketable equity securities totaling $47 million and $50 million as of the Successor periods ended June 30, 2014 and March 31, 2014, are measured on a recurring basis using quoted prices in active markets. The estimated fair value of the majority of our current and long-term debt, excluding our credit facilities, is determined based on quoted prices in active markets or by using other observable inputs that are derived principally from, or corroborated by, observable market data.
The following table presents carrying amounts and estimated fair values of current and long-term debt:
 
Successor
 
Carrying amount at June 30, 2014
 
Estimated Fair Value Using Input Type
 
 
Quoted prices in active markets
 
Observable
 
Unobservable
 
Total estimated fair value
 
(in millions)
Current and long-term debt
$
32,020

 
27,760

 
5,201

 
1,262

 
$
34,223

 
Successor
 
Carrying amount at March 31, 2014
 
Estimated Fair Value Using Input Type
 
 
Quoted prices in active markets
 
Observable
 
Unobservable
 
Total estimated fair value
 
(in millions)
Current and long-term debt
$
32,277

 
$
27,516

 
$
5,421

 
$
1,262

 
$
34,199