Quarterly report pursuant to Section 13 or 15(d)

Assets and Liabilities Measured at Fair Value

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Assets and Liabilities Measured at Fair Value
 6 Months Ended
Jun. 30, 2013
Fair Value [Abstract]  
Fair Value Disclosures
Assets and Liabilities Measured at Fair Value
For assets and liabilities required to be reported or disclosed at fair value, U.S. GAAP provides a hierarchy that prioritizes inputs to valuation techniques used to measure fair value into three broad levels. Level 1 inputs are quoted market prices in active markets for identical assets or liabilities that the reporting entity has the ability to access at the measurement date. Level 2 inputs are inputs, other than quoted market prices included within Level 1, that are observable for the asset or liability, either directly or indirectly. Level 3 inputs are unobservable inputs for the asset or liability.
The Company's assets and liabilities measured or disclosed at fair value were as follows:

Fair value measurements
at June 30, 2013 using
 
(in millions)
Total

Quoted prices
in active
markets for
identical
assets
(Level 1)

Significant
other
observable
inputs
(Level 2)

Significant
unobservable
inputs
(Level 3)

Current assets:




Cash equivalents
$
325

325

—

—

Long-term liabilities:




Debt (note 6)
3,843

—

3,843

—



Fair value measurements
at December 31, 2012 using
 
(in millions)
Total

Quoted prices
in active
markets for
identical
assets
(Level 1)

Significant
other
observable
inputs
(Level 2)

Significant
unobservable
inputs
(Level 3)

Curret assets:




Cash equivalents
$
424

424

—

—

Interest rate swap arrangements (note 6)
1

—

1

—

Current liabilities:




Interest rate swap arrangements (note 6)
13

—

13

—

Long-term liabilities








Debt (note 6)
3,626

—

3,626

—


The majority of the Company's Level 2 financial assets and liabilities are debt instruments with quoted market prices that are not considered to be traded on “active markets,” as defined in U.S. GAAP. Accordingly, the financial instruments are reported in the foregoing tables as Level 2 fair value instruments.
U.S. GAAP requires the incorporation of a credit risk valuation adjustment in the Company's fair value measurements to estimate the impact of both its own nonperformance risk and the nonperformance risk of its counterparties. The Company estimates credit risk associated with its own and its counterparties' nonperformance primarily by using observable credit default swap rates for terms similar to those of the remaining life of the instrument, adjusted for any master netting arrangements or other factors that provide an estimate of nonperformance risk. These are Level 3 inputs. However, as the credit risk valuation adjustments were not significant, the Company reported its interest rate swaps as Level 2. The counterparties to the Company's interest rate swap arrangements were all major international financial institutions.