Fair Value Measurements (Details) - USD ($) $ in Millions	Jun. 30, 2017	Dec. 31, 2016
Assets:
Deferred compensation assets	$ 8.0	$ 7.4
Foreign currency contracts	0.1	0.2
Total assets at fair value	8.1	7.6
Liabilities:
Contingent consideration	8.5	8.0
Deferred compensation liabilities	9.6	8.4
Interest rate swap contracts	0.4	1.0
Foreign currency contracts	4.9	1.6
Total liabilities at fair value	23.4	19.0
Level 1 [Member]
Assets:
Deferred compensation assets	8.0	7.4
Total assets at fair value	8.0	7.4
Liabilities:
Deferred compensation liabilities	9.6	8.4
Total liabilities at fair value	9.6	8.4
Level 2 [Member]
Assets:
Foreign currency contracts	0.1	0.2
Total assets at fair value	0.1	0.2
Liabilities:
Interest rate swap contracts	0.4	1.0
Foreign currency contracts	4.9	1.6
Total liabilities at fair value	5.3	2.6
Level 3 [Member]
Liabilities:
Contingent consideration	8.5	8.0
Total liabilities at fair value	$ 8.5	$ 8.0