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Equity (Accumulated Other Comprehensive Income) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | $ 58,936 | $ 52,123 | $ 57,768 | $ 48,326
Net other comprehensive income (loss) | (6) | 1 | (25) | 20
Ending balance | 59,436 | 53,564 | 59,436 | 53,564
Net Unrealized Gains on Cash Flow Hedges |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | 22 | 21 | 22 | 20
Other comprehensive loss before reclassifications | 0 | 0 | 0 | 0
Amounts reclassified from AOCI | 0 | 0 | 0 | 1
Net other comprehensive income (loss) | 0 | 0 | 0 | 1
Less other comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0 | 0
Ending balance | 22 | 21 | 22 | 21
Net Unrealized Gains (Losses) on Available for Sale Securities |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | (44) | (55) | (39) | (69)
Other comprehensive loss before reclassifications | (3) | (11) | (9) | (2)
Amounts reclassified from AOCI | 4 | 3 | 5 | 8
Net other comprehensive income (loss) | 1 | (8) | (4) | 6
Less other comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0 | 0
Ending balance | (43) | (63) | (43) | (63)
Defined Benefit Pension and Other Benefits Plans |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | (79) | (100) | (79) | (101)
Other comprehensive loss before reclassifications | 0 | 0 | 0 | 0
Amounts reclassified from AOCI | 0 | 0 | 0 | 1
Net other comprehensive income (loss) | 0 | 0 | 0 | 1
Less other comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0 | 0
Ending balance | (79) | (100) | (79) | (100)
Net Unrealized Gains (Losses) on Foreign Currency Translation |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | (73) | (72) | (64) | (74)
Other comprehensive loss before reclassifications | (7) | 9 | (21) | 12
Amounts reclassified from AOCI | 0 | 0 | 0 | 0
Net other comprehensive income (loss) | (7) | 9 | (21) | 12
Less other comprehensive (income) loss attributable to noncontrolling interests | 2 | (1) | 7 | (2)
Ending balance | (78) | (64) | (78) | (64)
Other Comprehensive Income Related to Equity Method Investees |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | 7 | 6 | 7 | 6
Other comprehensive loss before reclassifications | 0 | 0 | 0 | 0
Amounts reclassified from AOCI | 0 | 0 | 0 | 0
Net other comprehensive income (loss) | 0 | 0 | 0 | 0
Less other comprehensive (income) loss attributable to noncontrolling interests | 0 | 0 | 0 | 0
Ending balance | 7 | 6 | 7 | 6
Total |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Beginning balance | (167) | (200) | (153) | (218)
Other comprehensive loss before reclassifications | (10) | (2) | (30) | 10
Amounts reclassified from AOCI | 4 | 3 | 5 | 10
Net other comprehensive income (loss) | (6) | 1 | (25) | 20
Less other comprehensive (income) loss attributable to noncontrolling interests | 2 | (1) | 7 | (2)
Ending balance | (171) | (200) | (171) | (200)
Net unrealized gains (losses) on cash flow hedges. noncontrolling interest |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Ending balance | 0 | 0 | 0 | 0
Net unrealized gains (losses) on available for sale securities, noncontrolling interest |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Ending balance | 0 | 0 | 0 | 0
Defined benefit pension and other benefits plans, noncontrolling interest |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Ending balance | 0 | 0 | 0 | 0
Net unrealized gains (losses) on foreign currency translation, noncontrolling interest |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Ending balance | (17) | (11) | (17) | (11)
Other comprehensive income (loss) related to equity method investees, noncontrolling interest |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Ending balance | 0 | 0 | 0 | 0
Total, noncontrolling interest |  |  |  |
Accumulated Other Comprehensive Income (Loss) [Line Items] |  |  |  |
Ending balance | $ (17) | $ (11) | $ (17) | $ (11)

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