Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2026

Earnings Per Share [Abstract]

Schedule of Reconciliation of Basic and Diluted Earnings Per Share


			Three Months Ended March 31
			2026									2025
			Basic			Diluted						Basic			Diluted
Amounts Attributed to Phillips 66 Common Stockholders (millions):
Net Income Attributable to Phillips 66			207			207						487			487
Income allocated to participating securities			(2)			(2)						(2)			(2)

Net income available to common stockholders			$	205		205						485			485

Weighted-average common shares outstanding (thousands):			400,933			402,036						407,926			409,182
Effect of share-based compensation			1,103			1,237						1,256			1,323
Weighted-average common shares outstanding—EPS			402,036			403,273						409,182			410,505

Earnings Per Share of Common Stock (dollars)			$	0.51		0.51						1.19			1.18