Accounts Receivable Factoring (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Receivables [Abstract]
Accounts Receivable Sold	$ 34	$ 17	$ 40	$ 23
Cash Proceeds from Sale of Accounts Receivable	$ 29	$ 15	$ 34	$ 21

Amount of receivables sold under an accounts receivable sales program.

No definition available.

Name:	wfrd_TransferofAccountsReceivableAccountedforasSalesCarryingValue
Namespace Prefix:	wfrd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration