Capital Stock (Schedule of Shares Repurchased) (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2024	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Mar. 31, 2024	Jan. 31, 2024	Jan. 31, 2023	Oct. 31, 2021	Jan. 31, 2021
Class of Stock [Line Items]
Total number of shares repurchased (in shares)		73,497,623	22,748,842	38,156,312
Aggregate cost of shares repurchased		$ 3,400,000,000	$ 1,000,000,000	$ 1,825,000,000
January 2024 Share Repurchase Program [Member]
Class of Stock [Line Items]
Total number of shares repurchased (in shares)		73,500,000
Aggregate cost of shares repurchased		$ 3,400,000,000
Average price per share of shares repurchased (USD per share)		$ 46.26
Stock repurchase program, authorized amount					$ 3,400,000,000	$ 1,000,000,000.0
January 2023 Share Repurchase Program [Member]
Class of Stock [Line Items]
Total number of shares repurchased (in shares)			22,700,000
Aggregate cost of shares repurchased			$ 1,000,000,000
Average price per share of shares repurchased (USD per share)			$ 43.96
Stock repurchase program, authorized amount							$ 1,000,000,000.0
January 2021 Share Repurchase Program [Member]
Class of Stock [Line Items]
Total number of shares repurchased (in shares)				38,100,000
Aggregate cost of shares repurchased				$ 1,825,000,000
Average price per share of shares repurchased (USD per share)				$ 47.83
Stock repurchase program, authorized amount								$ 3,500,000,000	$ 2,000,000,000.0
ASR Agreements [Member]
Class of Stock [Line Items]
Total number of shares repurchased (in shares)	53,900,000	53,900,000
Average price per share of shares repurchased (USD per share)		$ 44.50
Stock repurchase program, authorized amount	$ 2,400,000,000