Aggregate dividends declared during the period for each share of common stock outstanding.

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Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount of tax expense (benefit) for reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Stockholders' equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions	1 Months Ended	3 Months Ended												12 Months Ended
	Dec. 31, 2025	Dec. 31, 2025	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Equity [Abstract]
Stock repurchases (in shares)														0	700,000	0
Stock repurchases														$ 200
Amount available for stock repurchases under a board approved stock repurchase plan	$ 6,800	$ 6,800												$ 6,800
Common stock, dividends declared per share (in usd per share)	$ 2.52	$ 2.38	$ 2.38	$ 2.38	$ 2.38	$ 2.25	$ 2.25	$ 2.25	$ 2.25	$ 2.13	$ 2.13	$ 2.13	$ 2.13	$ 9.66	$ 9.13	$ 8.64
Income taxes expense (benefit) for unrealized gains and losses for cash flow hedges														$ (53)	$ 105	$ 6
Income taxes expense or (benefit) for unrealized gains and losses for cash flow hedges and related reclassifications														$ 51	$ 25	$ 50
Preferred stock shares authorized (in shares)	5,000,000	5,000,000												5,000,000
Preferred stock, par value (in usd per share)	$ 0.0001	$ 0.0001												$ 0.0001