Investment and Other Income (Loss), Net (Tables)	12 Months Ended
Dec. 31, 2021
Investment and Other Income (Loss), Net [Abstract]
Components Of Investment And Other Income (Loss)	Successor Predecessor For the eight For the four For the year For the year months ended months ended ended ended December 31, April 30, December 31, December 31, ($ in millions) 2021 2021 2020 2019 Interest and dividend income $ 1 $ - $ 4 $ 9 Pension and OPEB benefit (costs) 2 2 (43) (42) All other, net (8) (1) (4) (4) Total investment and other income (loss), net $ (5) $ 1 $ (43) $ (37)

Tabular disclosure of the components of non-operating income or non-operating expense that may include amounts earned from dividends, interest on securities, gains (losses) on securities sold, equity earnings of unconsolidated affiliates, net gain (loss) on sales of business, interest expense and other miscellaneous income or expense items.

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