SCHEDULE I - PARENT COMPANY FINANCIAL INFORMATION (Condensed Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Current assets:
Cash and cash equivalents	$ 4,200	$ 2,221
Investment securities	15,703	18,214
Receivable from operating subsidiaries	3,270	2,704
Other current assets	9,560	6,676
Total current assets	32,733	29,815
Property and equipment, net	2,231	2,532
Other long-term assets	3,128	3,383
Total assets	48,909	46,479
Current liabilities:
Short-term debt	0	577
Book overdraft	306	403
Total current liabilities	16,346	16,939
Long-term debt	12,369	11,144
Other long-term liabilities	2,457	1,951
Total liabilities	31,172	30,034
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $1 par; 10,000,000 shares authorized; none issued	0	0
Common stock, $0.16 2/3 par; 300,000,000 shares authorized; 198,719,321 shares issued at December 31, 2025 and 198,718,810 shares issued at December 31, 2024	33	33
Capital in excess of par value	3,600	3,463
Retained earnings	29,075	28,317
Accumulated other comprehensive (loss) income	(633)	(1,067)
Treasury stock, at cost, 78,128,009 shares at December 31, 2025 and 78,077,195 shares at December 31, 2024	(14,418)	(14,371)
Total stockholders' equity	17,657	16,375
Total liabilities and equity	48,909	46,479
Parent Company
Current assets:
Cash and cash equivalents	1,328	329
Investment securities	215	233
Other current assets	1,854	595
Total current assets	6,739	4,031
Property and equipment, net	1,653	1,876
Investment in subsidiaries	31,516	31,011
Other long-term assets	944	364
Total assets	40,852	37,282
Current liabilities:
Short-term debt	0	577
Book overdraft	43	70
Other current liabilities	2,152	1,565
Total current liabilities	10,402	9,392
Long-term debt	12,369	11,144
Other long-term liabilities	424	371
Total liabilities	23,195	20,907
Commitments and contingencies
Stockholders’ equity:
Preferred stock, $1 par; 10,000,000 shares authorized; none issued	0	0
Common stock, $0.16 2/3 par; 300,000,000 shares authorized; 198,719,321 shares issued at December 31, 2025 and 198,718,810 shares issued at December 31, 2024	33	33
Capital in excess of par value	3,600	3,463
Retained earnings	29,075	28,317
Accumulated other comprehensive (loss) income	(633)	(1,067)
Treasury stock, at cost, 78,128,009 shares at December 31, 2025 and 78,077,195 shares at December 31, 2024	(14,418)	(14,371)
Total stockholders' equity	17,657	16,375
Total liabilities and equity	40,852	37,282
Parent Company | Subsidiaries
Current assets:
Receivable from operating subsidiaries	3,342	2,874
Current liabilities:
Payable to operating subsidiaries	7,505	7,144
Current portion of notes payable to operating subsidiaries	$ 702	$ 36