Employee Benefit Plans - Plan Assets at Fair Value, By Fair Value Hierarchy (Details) - Pension Plans [Member] - USD ($) $ in Millions	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Total investments	$ 5.7	$ 5.6	$ 5.3	$ 4.4
Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	2.5	2.6
Corporate and government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	2.7	2.7
Cash equivalents and other [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0.5	0.3
Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0.5	0.3
Level 1 [Member] | Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0.0	0.0
Level 1 [Member] | Corporate and government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0.0	0.0
Level 1 [Member] | Cash equivalents and other [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0.5	0.3
Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	5.2	5.3
Level 2 [Member] | Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	2.5	2.6
Level 2 [Member] | Corporate and government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	2.7	2.7
Level 2 [Member] | Cash equivalents and other [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0.0	0.0
Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0.0	0.0
Level 3 [Member] | Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0.0	0.0
Level 3 [Member] | Corporate and government bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	0.0	0.0
Level 3 [Member] | Cash equivalents and other [Member]
Defined Benefit Plan Disclosure [Line Items]
Total investments	$ 0.0	$ 0.0