Fair Value Measurements (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Assets:
Deferred compensation assets	$ 8.5	$ 7.4
Foreign currency contracts	1.0	0.2
Total assets at fair value	9.5	7.6
Liabilities:
Contingent consideration	8.0	8.0
Deferred compensation liabilities	9.5	8.4
Interest rate swap contracts	0.2	1.0
Foreign currency contracts	4.7	1.6
Total liabilities at fair value	22.4	19.0
Level 1 [Member]
Assets:
Deferred compensation assets	8.5	7.4
Total assets at fair value	8.5	7.4
Liabilities:
Deferred compensation liabilities	9.5	8.4
Total liabilities at fair value	9.5	8.4
Level 2 [Member]
Assets:
Foreign currency contracts	1.0	0.2
Total assets at fair value	1.0	0.2
Liabilities:
Interest rate swap contracts	0.2	1.0
Foreign currency contracts	4.7	1.6
Total liabilities at fair value	4.9	2.6
Level 3 [Member]
Liabilities:
Contingent consideration	8.0	8.0
Total liabilities at fair value	$ 8.0	$ 8.0