Accumulated Other Comprehensive Income (Loss) - Schedule of Components of Accumulated Other Comprehensive Loss in the Equity Section of the Balance Sheet (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ (5,673)
Other comprehensive income (loss)	(244)	$ (27)
Ending balance	(5,917)
Defined Benefit Plans
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(393)
Other comprehensive income (loss)	5
Ending balance	(388)
Unrealized Holding Gain/(Loss) on Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	2
Other comprehensive income (loss)	(3)
Ending balance	(1)
Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(5,344)
Other comprehensive income (loss)	(230)
Ending balance	(5,574)
Unrealized Gain/(Loss) on Hedging Activities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	62
Other comprehensive income (loss)	(16)
Ending balance	$ 46