Subsequent Events (Details) - Sprint and Affiliates - Addendum XX to Sprint PCS Management Agreement - Subsequent Event individual_people in Thousands, customer in Thousands	Apr. 06, 2017 customer individual_people
Subsequent Event [Line Items]
Market population \| individual_people	500
Number of customers \| customer	21

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration