Earnings Per Share - Calculation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024	Jun. 30, 2025	Jun. 30, 2024
Earnings Per Share [Abstract]
Net income	$ 768	$ 750	$ 737	$ 53	$ 1,518	$ 790
Dividend equivalent payments, basic	(1)		(1)		(2)	(2)
Dividend equivalent payments, diluted	0		(1)		(1)	(2)
Income available to common stockholders, basic	767		736		1,516	788
Income available to common stockholders, diluted	$ 768		$ 736		$ 1,517	$ 788
Weighted-average shares outstanding (in shares)	225.0		226.0		225.5	225.9
Dilutive effect of outstanding options and share-settled awards (in shares)	0.2		0.4		0.3	0.4
Adjusted weighted-average shares outstanding (in shares)	225.2		226.4		225.8	226.3
Earnings per share, basic (in dollars per share)	$ 3.41		$ 3.26		$ 6.72	$ 3.49
Earnings per share, diluted (in dollars per share)	$ 3.41		$ 3.25		$ 6.72	$ 3.48

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- Definition

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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