Shareholders' Equity and Redeemable Non-controlling Interests, Shareholders' Equity, Purchase of non-controlling interest (Details) - Lyondell Basell N.V. [Member] - USD ($) $ in Millions	1 Months Ended
Feb. 28, 2019	Dec. 31, 2018
Non-controlling interest, ownership percentage by parent	100.00%	85.00%
Purchase of non-controlling interest in subsidiary La Porte Methanol Company, L.P.	$ 63

Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 1A
-Subparagraph (d)
-URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 55
-Paragraph 4M
-URI http://asc.fasb.org/extlink&oid=116874947&loc=SL4591554-111686

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration