Fair Value Measurements (Fair Value of Assets and Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014
Assets:
Deferred compensation assets	$ 6.8	$ 6.6
Foreign currency contracts	0.2	0.2
Total assets at fair value	7.0	6.8
Liabilities:
Contingent consideration	6.0	5.0
Deferred compensation liabilities	8.8	8.7
Interest rate swap contracts	2.0	3.6
Foreign currency contracts	0.2
Total liabilities at fair value	17.0	17.3
Other Financial Instruments [Abstract]
Long-term debt, fair value	225.0	311.4
Long-term debt	228.9	308.3
Level 1 [Member]
Assets:
Deferred compensation assets	6.8	6.6
Total assets at fair value	6.8	6.6
Liabilities:
Deferred compensation liabilities	8.8	8.7
Total liabilities at fair value	8.8	8.7
Level 2 [Member]
Assets:
Foreign currency contracts	0.2	0.2
Total assets at fair value	0.2	0.2
Liabilities:
Interest rate swap contracts	2.0	3.6
Foreign currency contracts	0.2
Total liabilities at fair value	2.2	3.6
Level 3 [Member]
Liabilities:
Contingent consideration	6.0	5.0
Total liabilities at fair value	$ 6.0	$ 5.0