Consolidated Statements of Shareholders' Equity (Parenthetical) $ in Millions	9 Months Ended
	Sep. 30, 2016 USD ($)	[1]
Statement of Stockholders' Equity [Abstract]
Issuance of common stock related to share-based payment awards, income tax benefit	$ 1.6
Previous percentage ownership of noncontrolling owners	49.00%	[2]

[1] Amounts may not add due to rounding

[2] Relates to Tobras. See Note 3. Acquisitions, Asset and Liabilities Held for Sale.