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Segment Information - Reconciliation (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Segment Reporting Information [Line Items]        
Total adjusted EBITDA $ 2,215 $ 2,109 $ 5,893 $ 6,355
Depreciation and amortization (808) (951) (2,443) (3,142)
OPERATING INCOME 1,384 1,131 3,379 3,124
Total other expense, net (447) (415) (1,188) (1,102)
INCOME BEFORE INCOME TAXES 937 716 2,191 2,022
Income tax expense 359 172 670 497
NET INCOME 578 544 1,521 1,525
Operating Segments        
Segment Reporting Information [Line Items]        
Total adjusted EBITDA 3,141 3,563 9,851 10,800
Segment Reconciling Items        
Segment Reporting Information [Line Items]        
Total adjusted EBITDA (926) (1,454) (3,958) (4,445)
Operations and other expenses (926) (1,454) (3,958) (4,445)
Depreciation and amortization (808) (951) (2,443) (3,142)
Stock-based compensation (23) (27) (71) (89)
OPERATING INCOME 1,384 1,131 3,379 3,124
Total other expense, net $ (447) $ (415) $ (1,188) $ (1,102)