Debt - Repayments of Principal and Interest (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Total secured and unsecured debt, carrying amount	$ 114,264	$ 105,327
Interest payments in 2024	4,707
Interest payments in 2025	3,274
Interest payments in 2026	2,194
Interest payments in 2027	1,444
Interest payments in 2028	830
Interest payments thereafter	1,443
Interest payments	13,892
Total repayments in 2024	42,095
Total repayments in 2025	27,403
Total repayments in 2026	21,524
Total repayments in 2027	13,011
Total repayments in 2028	10,970
Total repayments thereafter	14,692
Total repayments of principal and interest	129,695
Secured Debt
Debt Instrument [Line Items]
Repayments of principal in 2024	18,010
Repayments of principal in 2025	15,071
Repayments of principal in 2026	8,681
Repayments of principal in 2027	4,199
Repayments of principal in 2028	3,556
Repayments of principal thereafter	131
Total secured and unsecured debt, carrying amount	49,648
Unsecured Debt
Debt Instrument [Line Items]
Repayments of principal in 2024	19,378
Repayments of principal in 2025	9,058
Repayments of principal in 2026	10,649
Repayments of principal in 2027	7,368
Repayments of principal in 2028	6,584
Repayments of principal thereafter	13,118
Total secured and unsecured debt, carrying amount	$ 66,155