Derivative Instruments - Balance Sheet Classification (Details) € in Millions, $ / BTU in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) $ / BTU	Dec. 31, 2022 USD ($) $ / BTU	Dec. 31, 2021 USD ($)	Dec. 31, 2023 EUR (€)	Jun. 30, 2023 EUR (€)	Dec. 31, 2022 EUR (€)
Derivatives, Fair Value
Payments for derivative instruments, financing activities	$ 40
Total asset derivatives	13	$ 18
Total liability derivatives	190	145
Current derivative asset	$ 13	$ 15
Derivative Asset, Current, Statement of Financial Position [Extensible Enumeration]	Prepaid Expense and Other Assets, Current	Prepaid Expense and Other Assets, Current		Prepaid Expense and Other Assets, Current		Prepaid Expense and Other Assets, Current
Current derivative liability	$ 17	$ 32
Derivative Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Current	Other Liabilities, Current		Other Liabilities, Current		Other Liabilities, Current
Noncurrent derivative asset		$ 3
Derivative Asset, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Assets, Noncurrent	Other Assets, Noncurrent		Other Assets, Noncurrent		Other Assets, Noncurrent
Noncurrent derivative liability	$ 173	$ 113
Derivative Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other Liabilities, Noncurrent	Other Liabilities, Noncurrent		Other Liabilities, Noncurrent		Other Liabilities, Noncurrent
Derivatives designated as hedging instruments
Derivatives, Fair Value
Total asset derivatives	$ 8	$ 13
Total liability derivatives	$ 181	$ 143
Derivatives designated as hedging instruments | Commodity forward contracts and collars
Derivatives, Fair Value
British Thermal Units ("BTUs") | $ / BTU	38	46
Total asset derivatives		$ 3
Total liability derivatives	$ 14	9
Derivatives designated as hedging instruments | Interest rate swaps - fair value hedges
Derivatives, Fair Value
Notional amount | €				€ 0	€ 725	€ 725
Total liability derivatives		44
Derivatives not designated as hedging instruments | Foreign exchange contracts
Derivatives, Fair Value
Notional amount	407	245
Total asset derivatives	5	5
Total liability derivatives	9	2
Cash Flow Hedges | Foreign exchange risk
Derivatives, Fair Value
Payments for derivative instruments, financing activities		7	$ 15
Fair Value Hedges | Derivatives designated as hedging instruments | Foreign exchange risk
Derivatives, Fair Value
Notional amount	833	844
Total asset derivatives	4	7
Total liability derivatives	111	62
Net investment hedges | Derivatives designated as hedging instruments
Derivatives, Fair Value
Notional amount | €				€ 483		€ 358
Total asset derivatives	4	3
Total liability derivatives	$ 56	$ 28