XML 100 R76.htm IDEA: XBRL DOCUMENT v3.22.0.1
Fair Value Measurements (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2021
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Aug. 30, 2021
Debt Instrument [Line Items]          
Impairments   $ 6 $ 2,830 $ 16  
Not Designated as Hedging Instrument          
Debt Instrument [Line Items]          
Impact of non-performance risk on fair value of the net derivative liability position   3 1    
Other non-core assets          
Debt Instrument [Line Items]          
Impairments   $ 6 5    
Other non-core assets | Nonrecurring          
Debt Instrument [Line Items]          
Impairments $ 6   5    
Carrying value of non core assets     $ 6    
Senior Notes | 4.10% Senior Notes due March 2022          
Debt Instrument [Line Items]          
Stated interest rate   4.10% 4.10%   4.10%