Recently Adopted and Recently Issued Accounting Guidance (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets classified in Other noncurrent assets	$ 108	$ 131
Present value of lease liabilities	114	138
Total equity	3,508	3,577	$ 4,605		$ 5,569
Retained earnings (Accumulated deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity	$ 603	$ 364	$ 113		(374)
Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity					73
Cumulative Effect, Period of Adoption, Adjustment | Retained earnings (Accumulated deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity					$ 75
ASU 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets classified in Other noncurrent assets				$ 320
Present value of lease liabilities				320
ASU 2016-02 | Cumulative Effect, Period of Adoption, Adjustment | Retained earnings (Accumulated deficit)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Total equity				73
ASU 2017-12
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect adjustment				$ 2