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Comprehensive Income
3 Months Ended
Mar. 31, 2020
Comprehensive Income Detail [Abstract]  
Comprehensive Income 5.  Comprehensive Income

The table below presents comprehensive income and earnings per share on comprehensive income for the periods indicated.

Three Months Ended March 31,

2020

2019

(in millions, except share or per share amounts)

Comprehensive income available for common stockholders

$

39

$

48

Earnings per share on comprehensive income

Basic

$

0.51

$

0.65

Diluted

$

0.51

$

0.64

Weighted average common shares outstanding

Basic

76,751,168

75,101,062

Diluted

77,568,464

75,977,511