Share-Based Compensation Plan - Performance-Based Equity Awards, Fair Value Assumptions (Details) - Performance-based shares - USD ($) $ in Millions	Feb. 12, 2020	Feb. 13, 2019	Feb. 14, 2018	Feb. 15, 2017	Feb. 10, 2016	Jul. 27, 2015	Feb. 11, 2015	Dec. 13, 2013
December 13, 2013 | Relative Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award								50.00%
Grant Date Fair Value by Component								$ 4.7
Volatility								29.00%
Dividend Yield								2.40%
December 13, 2013 | Relative Total Shareholder Return | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Interest Rate								0.34%
December 13, 2013 | Relative Total Shareholder Return | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Interest Rate								2.25%
December 13, 2013 | Absolute Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award								50.00%
Grant Date Fair Value by Component								$ 2.9
Volatility								29.00%
Dividend Yield								2.40%
December 13, 2013 | Absolute Total Shareholder Return | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Interest Rate								0.34%
December 13, 2013 | Absolute Total Shareholder Return | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Interest Rate								2.25%
February 11, 2015 | Relative Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award							30.00%
Grant Date Fair Value by Component							$ 0.9
Volatility							22.00%
Interest Rate							1.02%
Dividend Yield							2.50%
February 11, 2015 | Absolute Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award							40.00%
Grant Date Fair Value by Component							$ 0.7
Volatility							22.00%
Interest Rate							1.02%
Dividend Yield							2.50%
February 11, 2015 | EBITDA Comparison
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award							30.00%
Grant Date Fair Value by Component							$ 0.7
Volatility							22.00%
Interest Rate							1.02%
Dividend Yield							2.50%
July 27, 2015 | Relative Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award						30.00%
Grant Date Fair Value by Component						$ 0.0
Volatility						22.00%
Interest Rate						0.68%
Dividend Yield						2.50%
July 27, 2015 | Absolute Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award						40.00%
Grant Date Fair Value by Component						$ 0.0
Volatility						22.00%
Interest Rate						0.68%
Dividend Yield						2.50%
July 27, 2015 | EBITDA Comparison
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award						30.00%
Grant Date Fair Value by Component						$ 0.0
Volatility						22.00%
Interest Rate						0.68%
Dividend Yield						2.50%
February 10, 2016 | Relative Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award					70.00%
Grant Date Fair Value by Component					$ 1.6
Volatility					25.00%
Interest Rate					0.71%
Dividend Yield					3.00%
February 10, 2016 | Absolute Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award					15.00%
Grant Date Fair Value by Component					$ 0.2
Volatility					25.00%
Interest Rate					0.71%
Dividend Yield					3.00%
February 10, 2016 | EBITDA Comparison
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award					15.00%
Grant Date Fair Value by Component					$ 0.4
Volatility					25.00%
Interest Rate					0.71%
Dividend Yield					3.00%
February 15, 2017 | Relative Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award				65.00%
February 15, 2017 | Absolute Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award				35.00%
February 15, 2017 | Relative and Absolute Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value by Component				$ 2.7
Volatility				28.00%
Interest Rate				1.27%
Dividend Yield				5.60%
February 14, 2018 | Relative Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award			65.00%
February 14, 2018 | Absolute Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award			35.00%
February 14, 2018 | Relative and Absolute Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value by Component			$ 3.5
Volatility			28.00%
Interest Rate			2.37%
Dividend Yield			4.70%
February 13, 2019 | Relative Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award		65.00%
February 13, 2019 | Absolute Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award		35.00%
February 13, 2019 | Relative and Absolute Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Grant Date Fair Value by Component		$ 4.5
Volatility		26.00%
Interest Rate		2.52%
Dividend Yield		4.20%
February 12, 2020 | Relative Total Shareholder Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Total Award	100.00%
Grant Date Fair Value by Component	$ 4.9
Volatility	23.40%
Interest Rate	1.41%
Dividend Yield	0.00%