Debt - Schedule of Outstanding Debt (Details) $ in Millions	Mar. 31, 2026 USD ($)	Mar. 31, 2026 EUR (€)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 EUR (€)
Principal outstanding
Short-term debt	$ 53		$ 83
Total long-term debt	6,250		5,922
Less current maturities	(507)		(480)
Total long-term debt, less current maturities	5,743		5,442
Carrying amount
Total long-term debt	6,204		5,881
Less current maturities	(507)		(480)
Total long-term debt, less current maturities	5,697		5,401
Line of Credit | Revolving Credit Facility
Principal outstanding
Total long-term debt	250		0
Carrying amount
Total long-term debt	250		0
Senior Secured Borrowings | U.S. dollar due 2031
Principal outstanding
Total long-term debt	1,175		1,175
Carrying amount
Total long-term debt	1,169		1,173
Senior Secured Borrowings | Euro due 2031
Debt Instrument [Line Items]
Debt, face amount | €		€ 500,000,000		€ 500,000,000
Principal outstanding
Total long-term debt	577		587
Carrying amount
Total long-term debt	$ 575		587
Senior Notes and Debentures | U.S. dollar at 4.25% due 2026
Debt Instrument [Line Items]
Debt instrument, stated percentage	4.25%	4.25%
Principal outstanding
Total long-term debt	$ 400		400
Carrying amount
Total long-term debt	$ 400		400
Senior Notes and Debentures | €500 at 5.00% due 2028
Debt Instrument [Line Items]
Debt, face amount | €		€ 500,000,000
Debt instrument, stated percentage	5.00%	5.00%
Principal outstanding
Total long-term debt	$ 578		587
Carrying amount
Total long-term debt	$ 574		583
Senior Notes and Debentures | €500 at 4.75% due 2029
Debt Instrument [Line Items]
Debt, face amount | €		€ 500,000,000
Debt instrument, stated percentage	4.75%	4.75%
Principal outstanding
Total long-term debt	$ 578		587
Carrying amount
Total long-term debt	$ 573		582
Senior Notes and Debentures | €600 at 4.50% due 2030
Debt Instrument [Line Items]
Debt, face amount | €		€ 600,000,000
Debt instrument, stated percentage	4.50%	4.50%
Principal outstanding
Total long-term debt	$ 693		705
Carrying amount
Total long-term debt	$ 686		697
Senior Notes and Debentures | U.S. dollar at 5.25% due 2030
Debt Instrument [Line Items]
Debt instrument, stated percentage	5.25%	5.25%
Principal outstanding
Total long-term debt	$ 500		500
Carrying amount
Total long-term debt	$ 496		496
Senior Notes and Debentures | €500 at 3.750% due 2031
Debt Instrument [Line Items]
Debt instrument, stated percentage	3.75%	3.75%
Principal outstanding
Total long-term debt	$ 578		587
Carrying amount
Total long-term debt	$ 569		578
Senior Notes and Debentures | U.S. dollar at 5.875% due 2033
Debt Instrument [Line Items]
Debt instrument, stated percentage	5.875%	5.875%
Principal outstanding
Total long-term debt	$ 700		700
Carrying amount
Total long-term debt	$ 691		691
Senior Notes and Debentures | U.S. dollar at 7.50% due 2096
Debt Instrument [Line Items]
Debt instrument, stated percentage	7.50%	7.50%
Principal outstanding
Total long-term debt	$ 40		40
Carrying amount
Total long-term debt	40		40
Other Indebtedness
Principal outstanding
Total long-term debt	181		54
Carrying amount
Total long-term debt	$ 181		$ 54