Accumulated Other Comprehensive Income (Details) $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 68,774
Net change	1,274
Ending balance	71,538
Foreign Currency Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(10,149)
Net change	1,734
Ending balance	(8,415)
Gain/ (Loss) On Securities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(1)
Net change	1
Ending balance	0
Employee Benefit Plans
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,000)
Net change	61
Ending balance	(1,939)
Gain/ (Loss) On Derivatives & Hedges
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(377)
Net change	(522)
Ending balance	(899)
Total Accumulated Other Comprehensive Income/(Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(12,527)
Ending balance	$ (11,253)