Consolidated Statements of Changes in Shareholder's Equity - USD ($) $ in Millions	Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income (loss)	Noncontrolling interests
Balance at Dec. 31, 2024	$ 2,890	$ 745	$ 2	$ 3,300	$ (1,232)	$ 75
Increase (Decrease) in Shareholder's Equity [Roll Forward]
Profit of consolidated companies	268			267		1
Foreign currency translation, net of tax	310				310
Derivative financial instruments, net of tax	(19)				(19)
Balance at Jun. 30, 2025	3,449	745	2	3,567	(941)	76
Balance at Mar. 31, 2025	3,096	745	2	3,430	(1,156)	75
Increase (Decrease) in Shareholder's Equity [Roll Forward]
Profit of consolidated companies	138			137		1
Foreign currency translation, net of tax	222				222
Derivative financial instruments, net of tax	(7)				(7)
Balance at Jun. 30, 2025	3,449	745	2	3,567	(941)	76
Balance at Dec. 31, 2025	3,227	745	2	3,352	(938)	66
Increase (Decrease) in Shareholder's Equity [Roll Forward]
Profit of consolidated companies	289			289
Foreign currency translation, net of tax	(44)				(45)	1
Derivative financial instruments, net of tax	33				33
Balance at Jun. 30, 2026	3,505	745	2	3,641	(950)	67
Balance at Mar. 31, 2026	3,362	745	2	3,496	(947)	66
Increase (Decrease) in Shareholder's Equity [Roll Forward]
Profit of consolidated companies	145			145
Foreign currency translation, net of tax	(23)				(24)	1
Derivative financial instruments, net of tax	21				21
Balance at Jun. 30, 2026	$ 3,505	$ 745	$ 2	$ 3,641	$ (950)	$ 67