Earnings Per Share and Common Stock - Share Repurchases (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	9 Months Ended
Sep. 30, 2026	Jun. 30, 2026	Mar. 31, 2026	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2026	Sep. 30, 2025
Earnings Per Share [Abstract]
Number of shares	1,888,442	1,197,056	1,301,914	1,097,686	1,229,313	1,006,102	4,387,412	3,333,101
Average price per share (in usd per share)	$ 264.77	$ 250.61	$ 230.43	$ 182.20	$ 142.36	$ 124.24	$ 250.72	$ 150.01
Total	$ 500	$ 300	$ 300	$ 200	$ 175	$ 125	$ 1,100	$ 500

Number of shares that have been repurchased and retired during the period.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef
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Reference 7: http://www.xbrl.org/2009/role/commonPracticeRef
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+ Details