Shareholders' Equity - AOCI (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	$ 22,811	$ 22,127	$ 22,740	$ 22,178
Total other comprehensive income, net of tax	45	316	63	196
Ending balance	23,580	22,438	23,580	22,438
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,511)	(3,108)	(2,531)	(2,988)
Other comprehensive income (loss) before reclassifications	(77)	540	(116)	554
Gain (loss) on net investment hedges	22	(317)	83	(475)
Amounts reclassified from AOCI	109	7	103	(12)
Tax effect	(10)	86	(6)	129
Total other comprehensive income, net of tax	44	316	64	196
Ending balance	(2,467)	(2,792)	(2,467)	(2,792)
Foreign Currency Translation Adjustment
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(2,489)	(3,094)	(2,549)	(2,999)
Other comprehensive income (loss) before reclassifications	56	599	69	624
Gain (loss) on net investment hedges	22	(317)	83	(475)
Amounts reclassified from AOCI	0	0	0	0
Tax effect	(6)	75	(20)	113
Total other comprehensive income, net of tax	72	357	132	262
Ending balance	(2,417)	(2,737)	(2,417)	(2,737)
Deferred Gain (Loss) on Cash Flow Hedging Activities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	84	120	119	126
Other comprehensive income (loss) before reclassifications	(136)	(70)	(184)	(58)
Gain (loss) on net investment hedges	0	0	0	0
Amounts reclassified from AOCI	111	11	107	(6)
Tax effect	(5)	13	12	12
Total other comprehensive income, net of tax	(30)	(46)	(65)	(52)
Ending balance	54	74	54	74
Pension and Other Postretirement Benefit Liabilities
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(83)	(116)	(82)	(100)
Other comprehensive income (loss) before reclassifications	0	12	0	(8)
Gain (loss) on net investment hedges	0	0	0	0
Amounts reclassified from AOCI	(2)	(4)	(4)	(6)
Tax effect	0	(2)	1	4
Total other comprehensive income, net of tax	(2)	6	(3)	(10)
Ending balance	(85)	(110)	(85)	(110)
Unrealized (Loss) on Investments
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Beginning balance	(23)	(18)	(19)	(15)
Other comprehensive income (loss) before reclassifications	3	(1)	(1)	(4)
Gain (loss) on net investment hedges	0	0	0	0
Amounts reclassified from AOCI	0	0	0	0
Tax effect	1	0	1	0
Total other comprehensive income, net of tax	4	(1)	0	(4)
Ending balance	$ (19)	$ (19)	$ (19)	$ (19)