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Accumulated Other Comprehensive Income (Tables)
 6 Months Ended
Jun. 30, 2021
Equity [Abstract]  
Summary of Changes in Balances for Each Component of Accumulated Other Comprehensive Income

The following table summarizes the changes in our balances of each component of accumulated other comprehensive income. 

 

 

 

Three Months Ended June 30,

 

 

Six Months Ended June 30,

 

 

 

2021

 

 

2020

 

 

2021

 

 

2020

 

 

 

(in millions)

 

 

(in millions)

 

Currency translation adjustments:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of beginning of period

 

$

(6

)

 

$

(8

)

 

$

(6

)

 

$

(6

)

Currency translation adjustments

 

 

—

 

 

 

1

 

 

 

—

 

 

 

(1

)

Other comprehensive income (loss)

 

 

—

 

 

 

1

 

 

 

—

 

 

 

(1

)

Balance as of end of period

 

$

(6

)

 

$

(7

)

 

$

(6

)

 

$

(7

)

Employee benefit plans:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of beginning of period

 

$

8

 

 

$

11

 

 

$

8

 

 

$

11

 

Other comprehensive income

 

 

—

 

 

 

—

 

 

 

—

 

 

 

—

 

Balance as of end of period

 

$

8

 

 

$

11

 

 

$

8

 

 

$

11

 

Interest rate derivatives:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of beginning of period

 

$

2

 

 

$

—

 

 

$

(1

)

 

$

—

 

(Loss) income arising during period

 

 

(1

)

 

 

—

 

 

 

2

 

 

 

—

 

Other comprehensive (loss) income

 

 

(1

)

 

 

—

 

 

 

2

 

 

 

—

 

Balance as of end of period

 

$

1

 

 

$

—

 

 

$

1

 

 

$

—

 

Accumulated other comprehensive income

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Balance as of beginning of period

 

$

4

 

 

$

3

 

 

$

1

 

 

$

5

 

Other comprehensive (loss) income

 

 

(1

)

 

 

1

 

 

 

2

 

 

 

(1

)

Balance as of end of period

 

$

3

 

 

$

4

 

 

$

3

 

 

$

4