Debt - Schedule of Long-Term Debt (Details) € in Millions, ¥ in Millions, $ in Millions	May 22, 2026 USD ($)	Jun. 30, 2026 USD ($)	Jun. 30, 2026 JPY (¥)	Jun. 30, 2026 EUR (€)	May 22, 2026 JPY (¥)	Mar. 03, 2026	Dec. 31, 2025 USD ($)	Dec. 31, 2025 JPY (¥)
Debt Instrument [Line Items]
Short-term borrowings		$ 450					$ 0
Other, net		(24)					(16)
Total debt		4,501					3,050
Less: amounts due within one year		451					191
Total long-term debt		$ 4,050					2,859
6.750% Bonds, due 2028 | Currency Swap
Debt Instrument [Line Items]
Fixed interest rate (as a percent)	3.88%	3.88%	3.88%	3.88%	3.88%
Derivative liability | ¥			¥ 47,760		¥ 47,760
4.850% Notes, due 2031 | Currency Swap
Debt Instrument [Line Items]
Fixed interest rate (as a percent)		3.72%	3.72%	3.72%
Derivative liability | €				€ 458
Term Loan | JPY Term Loan Facility
Debt Instrument [Line Items]
Amount outstanding		$ 0	¥ 0				$ 191	¥ 29,702
Fixed interest rate (as a percent)							1.794%	1.794%
Impact on consolidated financial statements	$ 1
Bonds | 6.750% Bonds, due 2028
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)	6.75%	6.75%	6.75%	6.75%	6.75%
Amount outstanding	$ 300	$ 300					$ 300
Notes | 3.750% Notes, due 2028
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)		3.75%	3.75%	3.75%		3.75%
Amount outstanding		$ 400					0
Notes | 3.000% Notes, due 2029
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)		3.00%	3.00%	3.00%
Amount outstanding		$ 700					700
Notes | 3.900% Notes, due 2029
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)		3.90%	3.90%	3.90%		3.90%
Amount outstanding		$ 300					0
Notes | 4.850% Notes, due 2031
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)		4.85%	4.85%	4.85%
Amount outstanding		$ 500					500
Notes | 4.550% Notes, due 2032
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)		4.55%	4.55%	4.55%
Amount outstanding		$ 500					500
Notes | 4.750% Notes, due 2036
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)		4.75%	4.75%	4.75%		4.75%
Amount outstanding		$ 500					0
Notes | 5.950% Notes, due 2037
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)		5.95%	5.95%	5.95%
Amount outstanding		$ 625					625
Loans | 4.750% Iowa Finance Authority Loan, due 2042
Debt Instrument [Line Items]
Long-term debt, interest rate (as a percent)		4.75%	4.75%	4.75%
Amount outstanding		$ 250					$ 250