Debt - Schedule of Debt and Capital Lease Obligations (Parenthetical) (Details)	1 Months Ended	6 Months Ended
	Aug. 31, 2015	Jun. 30, 2016
4.7% senior notes due 2025
Debt Instrument [Line Items]
Debt instrument, interest rate	4.70%	4.70%
Debt instrument, maturity year	2025	2025
Senior unsecured credit facility- revolving loan due 2021
Debt Instrument [Line Items]
Debt instrument, maturity year		2021
Senior unsecured credit facility - revolving loan due 2019
Debt Instrument [Line Items]
Debt instrument, maturity year		2019