Earnings Per Share and Common Stock - Share Repurchases (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2026	Mar. 31, 2026	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2026	Jun. 30, 2025
Earnings Per Share [Abstract]
Number of shares	1,197,056	1,301,914	1,229,313	1,006,102	2,498,970	2,235,415
Average price per share (in usd per share)	$ 250.61	$ 230.43	$ 142.36	$ 124.24	$ 240.10	$ 134.20
Total	$ 300	$ 300	$ 175	$ 125	$ 600	$ 300