Capital Stock (Narrative) (Details) - USD ($)	3 Months Ended		12 Months Ended
	Sep. 30, 2023	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Jan. 31, 2024	Jan. 31, 2023	Oct. 31, 2021	Jan. 31, 2021
Class of Stock [Line Items]
Common stock, shares authorized (in shares)			12,000,000,000
Common stock, dividend increase, percentage	4.30%
Cash dividends declared (USD per share)	$ 0.98	$ 0.94	$ 3.84	$ 3.68	$ 3.52
Common stock, dividend rate, annual, per share (USD per share)			$ 3.92
January 2021 Share Repurchase Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount								$ 3,500,000,000	$ 2,000,000,000
January 2023 Share Repurchase Program [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount							$ 1,000,000,000
January 2024 Share Repurchase Program [Member] | Subsequent Event [Member]
Class of Stock [Line Items]
Stock repurchase program, authorized amount						$ 1,000,000,000
Serial Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized (in shares)			10,000,000
Preferred stock, par value (USD per share)			$ 1.00
Preferred stock, shares issued (in shares)			0
Share-based Payment Arrangement [Member]
Class of Stock [Line Items]
Shares of common stock reserved for stock-based awards (in shares)			25,422,465