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Financial Instruments and Fair Value Measurements
6 Months Ended
Mar. 31, 2019
Fair Value Disclosures [Abstract]  
Financial Instruments and Fair Value Measurements
Financial Instruments and Fair Value Measurements
The following reconciles cash and equivalents and restricted cash reported within the Company's consolidated balance sheets at March 31, 2019 and September 30, 2018 to the total of these amounts shown on the Company's consolidated statements of cash flows:
(Millions of dollars)
March 31, 2019
 
September 30, 2018
Cash and equivalents
$
686

 
$
1,140

Restricted cash
81

 
96

Cash and equivalents and restricted cash
$
767

 
$
1,236


Cash equivalents consist of all highly liquid investments with a maturity of three months or less at time of purchase. Restricted cash consists of cash restricted from withdrawal and usage except for certain product liability matters.
The Company’s cash and equivalents includes institutional money market accounts which permit daily redemption and the fair values of these investments are based upon the quoted prices in active markets provided by the holding financial institutions, which are considered Level 1 inputs in the fair value hierarchy. The fair values of these accounts were $25 million and $228 million at March 31, 2019 and September 30, 2018, respectively. The Company’s remaining cash and equivalents, excluding restricted cash, were $661 million and $913 million at March 31, 2019 and September 30, 2018, respectively.
Short-term investments are held to their maturities and are carried at cost, which approximates fair value. The short-term investments consist of instruments with maturities greater than three months and less than one year.
Long-term debt is recorded at amortized cost. The fair value of long-term debt is measured based upon quoted prices in active markets for similar instruments, which are considered Level 2 inputs in the fair value hierarchy. The fair value of long-term debt was $18.2 billion and $18.8 billion at March 31, 2019 and September 30, 2018, respectively. The fair value of the current portion of long-term debt was $3.0 billion and $1.9 billion at March 31, 2019 and September 30, 2018, respectively.
All other instruments measured by the Company at fair value, including derivatives and contingent consideration liabilities, are immaterial to the Company's consolidated balance sheets.