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Consolidated statement of comprehensive (loss) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement of comprehensive income [abstract]      
Net (loss) [1] $ (531) $ (656) $ (227)
Other comprehensive income to be eventually recycled into the consolidated income statement:      
Currency translation effects 19 (4) (58)
Total of items to eventually recycle 19 (4) (58)
Other comprehensive income never to be recycled into the consolidated income statement:      
Actuarial (losses)/gains from defined benefit plans, net of taxes [2] (14) (55) 8
Fair value adjustments on equity securities, net of taxes [3] (7) (2) (23)
Total of items never to be recycled (21) (57) (15)
Total comprehensive (loss) [1] $ (533) $ (717) $ (300)
[1] For periods prior to the Spin-off "Former parent net investment" and "Equity" were presented as "Retained earnings" and "Invested capital", respectively, and were renamed upon the execution of the Spin-off.
[2] Amounts are net of tax benefits of $13 million and $11 million in 2020 and 2019, respectively, and net of tax expense of $2 million in 2018.
[3] Amounts are net of tax benefits of $3 million and $5 million in 2020 and 2019, respectively. No taxes were recorded in 2018.