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Condensed consolidating financial information for bonds issued by WPP Finance 2010 with WPP plc as parent guarantor and WPP Jubilee Limited and WPP 2005 Limited as subsidiary guarantors - Condensed Consolidating Statement of Comprehensive Income (Detail) - GBP (£) £ in Millions | 6 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 | Dec. 31, 2017 | Jun. 30, 2017 | Dec. 31, 2017
Disclosure of condensed consolidating statement of comprehensive income [line items] |  |  |  |  |  |
Profit/(loss) for the period | £ 705.5 | £ 1,278.6 | £ 633.7 | [1] | £ 1,912.3 | [1]
Items that may be reclassified subsequently to profit or loss: |  |  |  |  |  |
Exchange adjustments on foreign currency net investments | (176.7) | (207.4) | (257.8) |  | (465.2) |
Gain/(loss) on revaluation of available for sale investments |  | 32.5 | (0.4) |  | 32.1 |
Items that may be reclassified subsequently to profit or loss | (176.7) |  | (258.2) |  | (433.1) |
Items that will not be reclassified subsequently to profit or loss: |  |  |  |  |  |
Actuarial gain/(loss) on defined benefit pension plans |  | 17.0 |  |  | 17.0 |
Deferred tax on defined benefit pension plans |  | (24.6) |  |  | (24.6) |
Fair value movements on equity investments | (140.5) |  |  |  |  |
Items that will not be reclassified subsequently to profit or loss | (140.5) |  |  |  | (7.6) |
Other comprehensive (loss)/income for the period | (317.2) | £ (182.5) | (258.2) |  | (440.7) |
Total comprehensive income/(loss) for the period | 388.3 |  | 375.5 |  | 1,471.6 |
Attributable to: |  |  |  |  |  |
Equity holders of the parent | 353.8 |  | 348.0 |  | 1,395.6 |
Non-controlling interests | 34.5 |  | 27.5 |  | 76.0 |
Total comprehensive income for the year | 388.3 |  | 375.5 |  | 1,471.6 |
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] |  |  |  |  |  |
Disclosure of condensed consolidating statement of comprehensive income [line items] |  |  |  |  |  |
Profit/(loss) for the period | 705.5 |  | 633.7 |  | 1,912.3 |
Items that may be reclassified subsequently to profit or loss: |  |  |  |  |  |
Exchange adjustments on foreign currency net investments | (176.7) |  | (257.8) |  | (465.2) |
Gain/(loss) on revaluation of available for sale investments |  |  | (0.4) |  | 32.1 |
Items that may be reclassified subsequently to profit or loss | (176.7) |  | (258.2) |  | (433.1) |
Items that will not be reclassified subsequently to profit or loss: |  |  |  |  |  |
Actuarial gain/(loss) on defined benefit pension plans |  |  |  |  | 17.0 |
Deferred tax on defined benefit pension plans |  |  |  |  | (24.6) |
Fair value movements on equity investments | (140.5) |  |  |  |  |
Items that will not be reclassified subsequently to profit or loss | (140.5) |  |  |  | (7.6) |
Other comprehensive (loss)/income for the period | (317.2) |  | (258.2) |  | (440.7) |
Total comprehensive income/(loss) for the period | 388.3 |  | 375.5 |  | 1,471.6 |
Attributable to: |  |  |  |  |  |
Equity holders of the parent | 353.8 |  | 348.0 |  | 1,395.6 |
Non-controlling interests | 34.5 |  | 27.5 |  | 76.0 |
Total comprehensive income for the year | 388.3 |  | 375.5 |  | 1,471.6 |
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | WPP plc [member] |  |  |  |  |  |
Disclosure of condensed consolidating statement of comprehensive income [line items] |  |  |  |  |  |
Profit/(loss) for the period | 672.4 |  | 596.1 |  | 1,816.6 |
Items that may be reclassified subsequently to profit or loss: |  |  |  |  |  |
Exchange adjustments on foreign currency net investments | (178.1) |  | (247.7) |  | (445.5) |
Gain/(loss) on revaluation of available for sale investments |  |  | (0.4) |  | 32.1 |
Items that may be reclassified subsequently to profit or loss | (178.1) |  | (248.1) |  | (413.4) |
Items that will not be reclassified subsequently to profit or loss: |  |  |  |  |  |
Actuarial gain/(loss) on defined benefit pension plans |  |  |  |  | 17.0 |
Deferred tax on defined benefit pension plans |  |  |  |  | (24.6) |
Fair value movements on equity investments | (140.5) |  |  |  |  |
Items that will not be reclassified subsequently to profit or loss | (140.5) |  |  |  | (7.6) |
Other comprehensive (loss)/income for the period | (318.6) |  | (248.1) |  | (421.0) |
Total comprehensive income/(loss) for the period | 353.8 |  | 348.0 |  | 1,395.6 |
Attributable to: |  |  |  |  |  |
Equity holders of the parent | 353.8 |  | 348.0 |  | 1,395.6 |
Total comprehensive income for the year | 353.8 |  | 348.0 |  | 1,395.6 |
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Subsidiary Guarantors [member] |  |  |  |  |  |
Disclosure of condensed consolidating statement of comprehensive income [line items] |  |  |  |  |  |
Profit/(loss) for the period | 724.6 |  | 644.3 |  | 1,901.2 |
Items that may be reclassified subsequently to profit or loss: |  |  |  |  |  |
Exchange adjustments on foreign currency net investments | (178.1) |  | (247.7) |  | (445.5) |
Gain/(loss) on revaluation of available for sale investments |  |  | (0.4) |  | 32.1 |
Items that may be reclassified subsequently to profit or loss | (178.1) |  | (248.1) |  | (413.4) |
Items that will not be reclassified subsequently to profit or loss: |  |  |  |  |  |
Actuarial gain/(loss) on defined benefit pension plans |  |  |  |  | 17.0 |
Deferred tax on defined benefit pension plans |  |  |  |  | (24.6) |
Fair value movements on equity investments | (140.5) |  |  |  |  |
Items that will not be reclassified subsequently to profit or loss | (140.5) |  |  |  | (7.6) |
Other comprehensive (loss)/income for the period | (318.6) |  | (248.1) |  | (421.0) |
Total comprehensive income/(loss) for the period | 406.0 |  | 396.2 |  | 1,480.2 |
Attributable to: |  |  |  |  |  |
Equity holders of the parent | 406.0 |  | 396.2 |  | 1,480.2 |
Total comprehensive income for the year | 406.0 |  | 396.2 |  | 1,480.2 |
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | WPP Finance 2010 [member] |  |  |  |  |  |
Disclosure of condensed consolidating statement of comprehensive income [line items] |  |  |  |  |  |
Profit/(loss) for the period | (11.7) |  | 6.5 |  | 1.8 |
Items that may be reclassified subsequently to profit or loss: |  |  |  |  |  |
Exchange adjustments on foreign currency net investments | 0.4 |  | (0.4) |  | (0.6) |
Items that may be reclassified subsequently to profit or loss | 0.4 |  | (0.4) |  | (0.6) |
Items that will not be reclassified subsequently to profit or loss: |  |  |  |  |  |
Other comprehensive (loss)/income for the period | 0.4 |  | (0.4) |  | (0.6) |
Total comprehensive income/(loss) for the period | (11.3) |  | 6.1 |  | 1.2 |
Attributable to: |  |  |  |  |  |
Equity holders of the parent | (11.3) |  | 6.1 |  | 1.2 |
Total comprehensive income for the year | (11.3) |  | 6.1 |  | 1.2 |
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Other Subsidiaries [member] |  |  |  |  |  |
Disclosure of condensed consolidating statement of comprehensive income [line items] |  |  |  |  |  |
Profit/(loss) for the period | 1,002.4 |  | 702.5 |  | 2,110.4 |
Items that may be reclassified subsequently to profit or loss: |  |  |  |  |  |
Exchange adjustments on foreign currency net investments | (177.1) |  | (257.4) |  | (464.6) |
Gain/(loss) on revaluation of available for sale investments |  |  | (0.4) |  | 32.1 |
Items that may be reclassified subsequently to profit or loss | (177.1) |  | (257.8) |  | (432.5) |
Items that will not be reclassified subsequently to profit or loss: |  |  |  |  |  |
Actuarial gain/(loss) on defined benefit pension plans |  |  |  |  | 17.0 |
Deferred tax on defined benefit pension plans |  |  |  |  | (24.6) |
Fair value movements on equity investments | (140.5) |  |  |  |  |
Items that will not be reclassified subsequently to profit or loss | (140.5) |  |  |  | (7.6) |
Other comprehensive (loss)/income for the period | (317.6) |  | (257.8) |  | (440.1) |
Total comprehensive income/(loss) for the period | 684.8 |  | 444.7 |  | 1,670.3 |
Attributable to: |  |  |  |  |  |
Equity holders of the parent | 650.3 |  | 417.2 |  | 1,594.3 |
Non-controlling interests | 34.5 |  | 27.5 |  | 76.0 |
Total comprehensive income for the year | 684.8 |  | 444.7 |  | 1,670.3 |
Condensed Consolidating Financial Information for Bonds Issued by WPP Finance 2010 with WPP plc as Parent Guarantor and WPP Jubilee Limited and WPP 2005 Limited as Subsidiary Guarantors [member] | Reclassifications/Eliminations [member] |  |  |  |  |  |
Disclosure of condensed consolidating statement of comprehensive income [line items] |  |  |  |  |  |
Profit/(loss) for the period | (1,682.2) |  | (1,315.7) |  | (3,917.7) |
Items that may be reclassified subsequently to profit or loss: |  |  |  |  |  |
Exchange adjustments on foreign currency net investments | 356.2 |  | 495.4 |  | 891.0 |
Gain/(loss) on revaluation of available for sale investments |  |  | 0.8 |  | (64.2) |
Items that may be reclassified subsequently to profit or loss | 356.2 |  | 496.2 |  | 826.8 |
Items that will not be reclassified subsequently to profit or loss: |  |  |  |  |  |
Actuarial gain/(loss) on defined benefit pension plans |  |  |  |  | (34.0) |
Deferred tax on defined benefit pension plans |  |  |  |  | 49.2 |
Fair value movements on equity investments | 281.0 |  |  |  |  |
Items that will not be reclassified subsequently to profit or loss | 281.0 |  |  |  | 15.2 |
Other comprehensive (loss)/income for the period | 637.2 |  | 496.2 |  | 842.0 |
Total comprehensive income/(loss) for the period | (1,045.0) |  | (819.5) |  | (3,075.7) |
Attributable to: |  |  |  |  |  |
Equity holders of the parent | (1,045.0) |  | (819.5) |  | (3,075.7) |
Total comprehensive income for the year | £ (1,045.0) |  | £ (819.5) |  | £ (3,075.7) |
[1] | Prior year figures have been restated for the impact of the adoption of IFRS 15: Revenue from Contracts with Customers and the change in income statement presentation, as described in note 2.

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