| Standard Label: | Other Defined Benefit Postretirement Obligations [Member] |
| Name: | nfp:OtherDefinedBenefitPostretirementObligationsMember |
| Identifier: | nfp_OtherDefinedBenefitPostretirementObligationsMember |
| Documentation: | |
| Category of Term: | Concept |
| References: | (Coming Soon!) |
| Balance type: | none |
| Period type: | duration |
| Data type: | nonnum:domainItemType |
Last updated: 4/29/2021 2:16:33 PM