Fair Value Measurements, Nonrecurring (Details) - USD ($)	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Assets
Loss recognized	$ 1,131,000,000	$ 0
Fair Value, Nonrecurring [Member]
Assets
Long-lived assets, fair value	1,569,000,000
Loss recognized	1,131,000,000
Nonrecurring Fair Value Measurements (Textual)
Assets measured at fair value			$ 0
Liabilities measured at fair value	0		$ 0
Fair Value, Nonrecurring [Member] | Benicia Refinery [Member]
Assets
Long-lived assets, fair value	722,000,000
Loss recognized	901,000,000
Fair Value, Nonrecurring [Member] | Wilmington Refinery [Member]
Assets
Long-lived assets, fair value	847,000,000
Loss recognized	230,000,000
Fair Value, Nonrecurring [Member] | Level 1 [Member]
Assets
Long-lived assets, fair value	0
Fair Value, Nonrecurring [Member] | Level 1 [Member] | Benicia Refinery [Member]
Assets
Long-lived assets, fair value	0
Fair Value, Nonrecurring [Member] | Level 1 [Member] | Wilmington Refinery [Member]
Assets
Long-lived assets, fair value	0
Fair Value, Nonrecurring [Member] | Level 2 [Member]
Assets
Long-lived assets, fair value	0
Fair Value, Nonrecurring [Member] | Level 2 [Member] | Benicia Refinery [Member]
Assets
Long-lived assets, fair value	0
Fair Value, Nonrecurring [Member] | Level 2 [Member] | Wilmington Refinery [Member]
Assets
Long-lived assets, fair value	0
Fair Value, Nonrecurring [Member] | Level 3 [Member]
Assets
Long-lived assets, fair value	1,569,000,000
Fair Value, Nonrecurring [Member] | Level 3 [Member] | Benicia Refinery [Member]
Assets
Long-lived assets, fair value	722,000,000
Fair Value, Nonrecurring [Member] | Level 3 [Member] | Wilmington Refinery [Member]
Assets
Long-lived assets, fair value	$ 847,000,000