Shareholders' Equity (Dividends Declared) (Details) - Dividend Paid - USD ($) $ / shares in Units, $ in Millions	Nov. 25, 2015	Aug. 24, 2015	May. 21, 2015	Feb. 27, 2015	Nov. 26, 2014	Aug. 29, 2014	May. 27, 2014	Mar. 14, 2014	Nov. 26, 2013	Aug. 29, 2013	Jun. 03, 2013	Mar. 01, 2013
Dividends Payable [Line Items]
Distribution Per Share	$ 0.65	$ 0.62	$ 0.62	$ 0.62	$ 0.62	$ 0.57	$ 0.57	$ 0.57	$ 0.55	$ 0.50	$ 0.50	$ 0.50
Aggregate Payment Amount	$ 48.5	$ 46.3	$ 46.3	$ 46.0	$ 46.0	$ 41.4	$ 41.5	$ 41.1	$ 39.6	$ 36.1	$ 35.8	$ 35.7
Qualified
Dividends Payable [Line Items]
Distribution Per Share	$ 0.0555382	$ 0.0529749	$ 0.0529749	$ 0.0529749	$ 0.0487594	$ 0.0448272	$ 0.0448272	$ 0.0448272	$ 0.1706163	$ 0.1551057	$ 0.1551057	$ 0.1551057
Non-Qualified
Dividends Payable [Line Items]
Distribution Per Share	0.4340030	0.4139721	0.4139721	0.4139721	0.4518556	0.4154156	0.4154156	0.4154156	$ 0.3793837	$ 0.3448943	$ 0.3448943	$ 0.3448943
Nondividend Distributions
Dividends Payable [Line Items]
Distribution Per Share	$ 0.1604588	$ 0.1530530	$ 0.1530503	$ 0.1530530	$ 0.1193850	$ 0.1097572	$ 0.1097572	$ 0.1097572