Earnings Per Share (Narrative) (Details) - shares shares in Millions	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Earnings Per Share [Abstract]
Contingently issuable share excluded	0.2	0.4	0.3

Contingently issuable shares that were excluded from the computation of diluted earnings per share because the necessary performance conditions for the shares to be issuable had not yet been satisfied at the end of the period

No definition available.

Name:	ivz_ContingentlyIssuableShareExcluded
Namespace Prefix:	ivz_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant