Statement Of Financial Position [Abstract]

NATIONWIDE BUILDING SOCIETY - Filing #4393884

Concept	As at 2023-04-04	As at 2023-04-04	As at 2023-04-04	As at 2023-04-04	As at 2023-04-04	As at 2023-04-04	As at 2023-04-04	As at 2023-04-04	As at 2022-04-04	As at 2022-04-04	As at 2022-04-04	As at 2022-04-04	As at 2022-04-04	As at 2022-04-04	As at 2022-04-04	As at 2022-04-04	As at 2021-04-04	As at 2021-04-04	As at 2021-04-04	As at 2021-04-04	As at 2021-04-04	As at 2021-04-04	As at 2021-04-04	As at 2021-04-04
Statement of financial position [abstract]
Assets [abstract]
Current tax assets	—	—	15,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	33,000,000 GBP	—	—	—	—	—	—	—	—
Deferred tax assets	—	—	119,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	59,000,000 GBP	—	—	—	—	—	—	—	—
Cash and cash equivalents	—	—	25,955,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	30,824,000,000 GBP	—	—	—	—	—	—	—	17,705,000,000 GBP
Assets	—	—	271,893,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	272,354,000,000 GBP	—	—	—	—	—	—	—	—
Equity and liabilities [abstract]
Equity [abstract]
Equity	38,000,000 GBP	176,000,000 GBP	16,906,000,000 GBP	1,233,000,000 GBP	1,336,000,000 GBP	47,000,000 GBP	14,000,000 GBP	14,184,000,000 GBP	46,000,000 GBP	184,000,000 GBP	1,334,000,000 GBP	1,336,000,000 GBP	12,753,000,000 GBP	43,000,000 GBP	89,000,000 GBP	15,699,000,000 GBP	44,000,000 GBP	195,000,000 GBP	1,334,000,000 GBP	1,336,000,000 GBP	11,140,000,000 GBP	46,000,000 GBP	110,000,000 GBP	14,113,000,000 GBP
Liabilities [abstract]
Provisions [abstract]
Provisions	—	—	82,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	153,000,000 GBP	—	—	—	—	—	—	—	—
Deferred tax liabilities	—	—	406,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	430,000,000 GBP	—	—	—	—	—	—	—	—
Liabilities	—	—	254,987,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	256,655,000,000 GBP	—	—	—	—	—	—	—	—
Equity and liabilities	—	—	271,893,000,000 GBP	—	—	—	—	—	—	—	—	—	—	—	—	272,354,000,000 GBP	—	—	—	—	—	—	—	—