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Noncontrolling Interests (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Noncontrolling Interests:                
Net income attributable to noncontrolling interest $ 181     $ 182     $ 533 $ 605
Purchase of noncontrolling interest (shares) 196,409     836,655     677,584 2,557,256
Purchase price of noncontrolling interest $ 78     $ 385     $ 254 $ 1,379
Purchase of noncontrolling interest, net of tax (69) $ (50) $ (108) (334) $ (494) $ (353)    
Change in noncontrolling interest ownership, net of tax $ (5) 1 (9) $ (31) (61) (61)    
A/N                
Noncontrolling Interests:                
Ownership percentage held by noncontrolling interest (percentage) 11.00%     11.00%     11.00% 11.00%
Common Noncontrolling Interest                
Noncontrolling Interests:                
Net income attributable to noncontrolling interest $ 181     $ 182     $ 532 $ 604
Noncontrolling Interests                
Noncontrolling Interests:                
Purchase of noncontrolling interest, net of tax (44) (34) (68) (179) (238) (156) (146) (573)
Change in noncontrolling interest ownership, net of tax (23) 7 (37) (127) (244) (250) (53) (621)
Additional Paid-in Capital                
Noncontrolling Interests:                
Purchase of noncontrolling interest, net of tax (25) (16) (40) (155) (256) (197)    
Impact of noncontrolling interest purchased (25)     (155)     (81) (608)
Change in noncontrolling interest ownership, net of tax $ 18 $ (6) $ 28 $ 96 $ 183 $ 189 $ 40 $ 468
Maximum | Charter                
Noncontrolling Interests:                
Minority Interest Ownership Percentage Threshold 100.00%           100.00%