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Fair Value Measurements - Summary of Assets and Liabilities Measured On a Non-Recurring Basis (Details) - Nonrecurring basis - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Properties, plant and equipment, net (held and used) $ 124 $ 2,443
Properties, plant and equipment, net (held for sale) 0 1,418
Investments and advances 16 28
Total assets at fair value 140 3,889
Properties, plant and equipment, net (held and used), Before-Tax Loss 414 2,599
Properties, plant and equipment, net (held for sale), Before-Tax Loss 0 193
Investments and advances, Before-Tax Loss 32 2,555
Total nonrecurring assets at fair value, Before-Tax Loss 446 5,347
Level 1    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Properties, plant and equipment, net (held and used) 0 0
Properties, plant and equipment, net (held for sale) 0 0
Investments and advances 0 0
Total assets at fair value 0 0
Level 2    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Properties, plant and equipment, net (held and used) 0 20
Properties, plant and equipment, net (held for sale) 0 1,418
Investments and advances 0 0
Total assets at fair value 0 1,438
Level 3    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Properties, plant and equipment, net (held and used) 124 2,423
Properties, plant and equipment, net (held for sale) 0 0
Investments and advances 16 28
Total assets at fair value $ 140 $ 2,451