Accounts Payable and Accrued Liabilities

12 Months Ended

Dec. 31, 2010

Account Payable and Accrued Liabilities [Abstract]

Accounts Payable and Accrued Liabilities

Note 10. Accounts Payable and Accrued Liabilities

     Under our cash-management system, certain cash accounts reflected negative balances to the extent checks written have not been presented for payment. These negative balances represent obligations and have been reclassified to accounts payable. Accounts payable includes $58 million of these negative balances at December 31, 2010 and $44 million at December 31, 2009.

Accrued Liabilities

	December 31,
	2010		2009
	(Millions)
Income taxes	$	275	$	112
Interest on debt		162		199
Employee costs		146		158
Taxes other than income taxes		110		176
Other, including other loss contingencies		309		303
	$	1,002	$	948