In order to determine net cash provided by operating activities, net income (loss) is adjusted by, among other things, changes in current assets and current liabilities as follows (in millions):


	Six Months Ended June 30,
	2022		2021
Increase in current assets:
Receivables, net	$	(4,163)	$	(3,069)
Inventories	(1,056)		(47)

Prepaid expenses and other	(108)		(103)
Increase (decrease) in current liabilities:
Accounts payable	4,240		3,979
Accrued expenses	(126)		284
Taxes other than income taxes payable	133		162
Income taxes payable	952		45
Changes in current assets and current liabilities	$	(128)	$	1,251

Changes in current assets and current liabilities for the six months ended June 30, 2022 were primarily due to the following:

•The increase in receivables was due to an increase in refined petroleum product prices in June 2022 compared to December 2021, partially offset by a decrease in sales volumes;

•The increase in inventories was due to an increase in inventory volumes with higher inventory unit prices in June 2022 compared to December 2021;

•The increase in accounts payable was due to an increase in crude oil and other feedstock prices in June 2022 compared to December 2021, partially offset by a decrease in crude oil and other feedstock volumes purchased; and

•The increase in income taxes payable was primarily due to higher income before income tax expense in the second quarter of 2022.

Changes in current assets and current liabilities for the six months ended June 30, 2021 were primarily due to the following:

•The increase in receivables was primarily due to an increase in refined petroleum product prices in June 2021 compared to December 2020 combined with an increase in sales volumes, partially offset by a decrease in income taxes receivable associated with the receipt of a $962 million refund related to our U.S. federal income tax return for 2020; and

•The increase in accounts payable was due to an increase in crude oil and other feedstock prices in June 2021 compared to December 2020 combined with an increase in crude oil and other feedstock volumes purchased.


	Six Months Ended June 30,
	2022		2021
Interest paid in excess of amount capitalized, including interest on finance leases	$	291	$	290
Income taxes paid (refunded), net	916		(882)

Supplemental cash flow information related to our operating and finance leases was as follows (in millions):


	Six Months Ended June 30,
	2022				2021
	Operating Leases		Finance Leases		Operating Leases		Finance Leases
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows	$	196	$	39	$	199	$	35

Financing cash flows	—		86		—		63
Changes in lease balances resulting from new and modified leases	92		164		315		46

There were no significant noncash investing and financing activities during the six months ended June 30, 2022 and 2021, except as noted in the table above.