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Borrowings and Other Obligations (Schedule of Short-term Debt) (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021	Aug. 04, 2020	Dec. 12, 2019
Short-term Debt [Line Items]
Other Short-term Financing Arrangements	$ 13	$ 12
Short-term Borrowings and Current Portion of Finance Leases	13	12
Long-term Debt and Lease Obligation	2,416	2,416
Senior Notes
Short-term Debt [Line Items]
Long-term Debt	300	300
Senior Notes \| Senior Notes 8.625 Percent Due 2030
Short-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			8.625%
Long-term Debt	1,584	1,584
Senior Notes \| Exit Notes, 11.00 Percent Due 2024
Short-term Debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				11.00%
Other short-term bank loans
Short-term Debt [Line Items]
Finance Lease, Liability, Noncurrent	43	44
Secured Debt
Short-term Debt [Line Items]
Long-term Debt	489	488
Other short-term bank loans
Short-term Debt [Line Items]
Finance Lease, Liability, Current	$ 13	$ 12