Trade and other receivables - Securitization liabilities (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Trade and other receivables, net
Current portion	$ 15	$ 14
Non-current portion	37	47
Total securitization liabilities	$ 52	$ 61

Carrying value as of the balance sheet date of obligations incurred and payable for Securitization liability. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

No definition available.

Name:	maxr_SecuritizationLiabilityCurrent
Namespace Prefix:	maxr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant