Earnings Per Share (Calculation Of Earnings Per Share) (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Earnings Per Share [Abstract]
Income from continuing operations, net of taxes	$ 208.8	$ 195.5
Net (income)/loss attributable to noncontrolling interests in consolidated entities	(19.0)	22.6
Income from continuing operations attributable to Invesco Ltd. for basic and diluted EPS calculations	189.8	218.1
Income/(loss) from discontinued operations, net of taxes	(2.0)	4.1
Net income attributable to common shareholders	$ 187.8	$ 222.2
Weighted average shares outstanding - basic (in shares)	436.8	447.8
Dilutive effect on share-based awards (in shares)	0.6	1.2
Weighted average shares outstanding - diluted (in shares)	437.4	449.0
Basic earnings per share:
Earnings per share from continuing operations (usd per share)	$ 0.43	$ 0.49
Earnings per share from discontinued operations (usd per share)	$ 0.00	$ 0.01
Basic earnings per share (usd per share)	$ 0.43	$ 0.50
Diluted earnings per share:
Earnings per share from continuing operations (usd per share)	$ 0.43	$ 0.49
Earnings per share from discontinued operations (usd per share)	$ 0.00	$ 0.01
Diluted earnings per share (usd per share)	$ 0.43	$ 0.49