Consolidated Balance Sheets (MPLX Parenthetical) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 2,167	$ 887
Receivables, less allowance for doubtful accounts	3,284	3,617
Inventories	5,392	5,656
Other current assets	199	241
Equity method investments	4,704	3,827
Property, plant and equipment, net	25,669	25,765
Goodwill	3,586	3,587
Other noncurrent assets	820	833
Liabilities
Accounts payable	5,343	5,593
Payroll and benefits payable	528	530
Consumer excise taxes payable	482	464
Accrued taxes	135	153
Debt due within one year	28	28
Other current liabilities	350	378
Total long-term debt due after one year	12,570	10,544
Defined benefit postretirement plan obligations	1,085	1,055
Deferred credits and other liabilities	615	604
MPLX LP
Assets
Cash and cash equivalents	265	234
Receivables, less allowance for doubtful accounts	276	304
Inventories	62	55
Other current assets	31	33
Equity method investments	3,306	2,471
Property, plant and equipment, net	11,411	11,408
Goodwill	2,245	2,245
Other noncurrent assets	499	506
Liabilities
Accounts payable	485	541
Payroll and benefits payable	0	1
Consumer excise taxes payable	2	3
Accrued taxes	29	35
Debt due within one year	1	1
Other current liabilities	98	81
Total long-term debt due after one year	6,654	4,422
Deferred income taxes	6	6
Defined benefit postretirement plan obligations	0	0
Deferred credits and other liabilities	$ 187	$ 189

Carrying value as of the balance sheet date of liabilities incurred (and for which invoices have typically been received) and payable to vendors for goods and services received that are used in an entity's business. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.