Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Millions	Total	Preferred Stock [Member]	Common Stock	Additional Paid-in Capital	Retained Earnings	AOCI Attributable to Parent [Member]	Treasury Stock, Common	Share-based Payment Arrangement [Member] Treasury Stock, Common
Beginning balance at Dec. 31, 2022				$ 1,895	$ 17,058	$ (3,841)	$ (1,773)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under incentive and stock compensation plans and other				(114)
Stock-based compensation plans expense				66
Net income	$ 535				535
Dividends declared on preferred stock					(5)
Dividends declared on common stock					(134)
Treasury stock acquired	(350)						(354)
Issuance of shares under incentive and stock compensation plans from treasury stock and other								$ 132
Net shares acquired related to employee incentive and stock compensation plans							(49)
Total other comprehensive income (loss)						587
Ending balance at Mar. 31, 2023	$ 14,340	$ 334	$ 3	1,847	17,454	(3,254)	(2,044)
Preferred Stock, Shares Outstanding, Ending Balance at Mar. 31, 2023		13,800
Common Shares Outstanding, beginning of period at Dec. 31, 2022			315,111,000
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Treasury stock acquired	(4,700,000)		(4,719,000)
Issuance of shares under incentive and stock compensation plans and other			2,005,000
Return of shares under incentive and stock compensation plans to treasury stock			(617,000)
Common Shares Outstanding, at end of period at Mar. 31, 2023			311,780,000
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Cash dividends declared per common share	$ 0.425
Cash dividends declared per preferred share	$ 375.00
Beginning balance at Dec. 31, 2023	$ 15,327			648	19,007	(2,849)	(1,816)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance of shares under incentive and stock compensation plans and other				(161)
Stock-based compensation plans expense				64
Net income	753				753
Dividends declared on preferred stock					(5)
Dividends declared on common stock					(141)
Treasury stock acquired	(350)						(353)
Issuance of shares under incentive and stock compensation plans from treasury stock and other								$ 211
Net shares acquired related to employee incentive and stock compensation plans							(79)
Total other comprehensive income (loss)						(148)
Ending balance at Mar. 31, 2024	$ 15,468	$ 334	$ 3	$ 551	$ 19,614	$ (2,997)	$ (2,037)
Preferred Stock, Shares Outstanding, Ending Balance at Mar. 31, 2024		13,800
Common Shares Outstanding, beginning of period at Dec. 31, 2023			298,472,000
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Treasury stock acquired	(3,800,000)		(3,847,000)
Issuance of shares under incentive and stock compensation plans and other			3,004,000
Return of shares under incentive and stock compensation plans to treasury stock			(822,000)
Common Shares Outstanding, at end of period at Mar. 31, 2024			296,807,000
Shares Granted or Issued, Share-based Payment Arrangement [Abstract]
Cash dividends declared per common share	$ 0.470
Cash dividends declared per preferred share	$ 375.00