Derivative Instruments and Hedging Activities - Balance sheet location (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Fair value of derivatives
Assets	$ 106	$ 24
Liabilities	128	28
Designated Hedging Instruments
Fair value of derivatives
Assets	11	17
Liabilities	46	24
Net Assets/(Liabilities)	(35)	(7)
Designated Hedging Instruments \| Balance Sheet Location [Axis]: us-gaap:AccountsPayableCurrent
Fair value of derivatives
Liabilities	41	24
Designated Hedging Instruments \| Balance Sheet Location [Axis]: us-gaap:AccountsReceivableNetCurrent
Fair value of derivatives
Assets	8	17
Designated Hedging Instruments \| Balance Sheet Location [Axis]: us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent
Fair value of derivatives
Liabilities	5	0
Designated Hedging Instruments \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Fair value of derivatives
Assets	3	0
Designated Hedging Instruments \| Commodity
Fair value of derivatives
Assets	6	4
Liabilities	34	13
Net Assets/(Liabilities)	(28)	(9)
Designated Hedging Instruments \| Commodity \| Balance Sheet Location [Axis]: us-gaap:AccountsPayableCurrent
Fair value of derivatives
Liabilities	30	13
Designated Hedging Instruments \| Commodity \| Balance Sheet Location [Axis]: us-gaap:AccountsReceivableNetCurrent
Fair value of derivatives
Assets	4	4
Designated Hedging Instruments \| Commodity \| Balance Sheet Location [Axis]: us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent
Fair value of derivatives
Liabilities	4	0
Designated Hedging Instruments \| Commodity \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Fair value of derivatives
Assets	2	0
Designated Hedging Instruments \| Foreign Currency
Fair value of derivatives
Assets	5	13
Liabilities	12	11
Net Assets/(Liabilities)	(7)	2
Designated Hedging Instruments \| Foreign Currency \| Balance Sheet Location [Axis]: us-gaap:AccountsPayableCurrent
Fair value of derivatives
Liabilities	11	11
Designated Hedging Instruments \| Foreign Currency \| Balance Sheet Location [Axis]: us-gaap:AccountsReceivableNetCurrent
Fair value of derivatives
Assets	4	13
Designated Hedging Instruments \| Foreign Currency \| Balance Sheet Location [Axis]: us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent
Fair value of derivatives
Liabilities	1	0
Designated Hedging Instruments \| Foreign Currency \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Fair value of derivatives
Assets	1	0
Non-Designated Hedging Instruments
Fair value of derivatives
Assets	95	7
Liabilities	82	4
Net Assets/(Liabilities)	13	3
Non-Designated Hedging Instruments \| Balance Sheet Location [Axis]: us-gaap:AccountsPayableCurrent
Fair value of derivatives
Liabilities	9	4
Non-Designated Hedging Instruments \| Balance Sheet Location [Axis]: us-gaap:AccountsReceivableNetCurrent
Fair value of derivatives
Assets	13	6
Non-Designated Hedging Instruments \| Balance Sheet Location [Axis]: us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent
Fair value of derivatives
Liabilities	73	0
Non-Designated Hedging Instruments \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Fair value of derivatives
Assets	82	1
Non-Designated Hedging Instruments \| Commodity
Fair value of derivatives
Assets	2	1
Liabilities	4	1
Net Assets/(Liabilities)	(2)	0
Non-Designated Hedging Instruments \| Commodity \| Balance Sheet Location [Axis]: us-gaap:AccountsPayableCurrent
Fair value of derivatives
Liabilities	4	1
Non-Designated Hedging Instruments \| Commodity \| Balance Sheet Location [Axis]: us-gaap:AccountsReceivableNetCurrent
Fair value of derivatives
Assets	2	1
Non-Designated Hedging Instruments \| Commodity \| Balance Sheet Location [Axis]: us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent
Fair value of derivatives
Liabilities	0	0
Non-Designated Hedging Instruments \| Commodity \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Fair value of derivatives
Assets	0	0
Non-Designated Hedging Instruments \| Foreign Currency
Fair value of derivatives
Assets	93	6
Liabilities	78	3
Net Assets/(Liabilities)	15	3
Non-Designated Hedging Instruments \| Foreign Currency \| Balance Sheet Location [Axis]: us-gaap:AccountsPayableCurrent
Fair value of derivatives
Liabilities	5	3
Non-Designated Hedging Instruments \| Foreign Currency \| Balance Sheet Location [Axis]: us-gaap:AccountsReceivableNetCurrent
Fair value of derivatives
Assets	11	5
Non-Designated Hedging Instruments \| Foreign Currency \| Balance Sheet Location [Axis]: us-gaap:LiabilitiesOtherThanLongtermDebtNoncurrent
Fair value of derivatives
Liabilities	73	0
Non-Designated Hedging Instruments \| Foreign Currency \| Balance Sheet Location [Axis]: us-gaap:OtherAssetsNoncurrent
Fair value of derivatives
Assets	$ 82	$ 1