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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Net income | $ 155 | $ 214 | $ 212
Other comprehensive income (loss)- Change in compensation retirement benefits liability and amortization, net of taxes of $1 million in 2020 and immaterial amounts in 2019 and 2018 | (1) | (1) | 1
Comprehensive income | $ 154 | $ 213 | $ 213

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