Earnings (Loss) per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Jun. 24, 2016	Jun. 26, 2015	Jun. 24, 2016	Jun. 26, 2015
Earnings Per Share, by Common Class, Including Two Class Method [Line Items]
Income from continuing operations attributable to common shareholders before allocation of earnings to participating securities	$ 195.7	$ 55.6	$ 431.9	$ 218.2
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	0.0	0.4	0.0	2.0
Income from continuing operations attributable to common shareholders, after earnings allocated to participating securities	195.7	55.2	431.9	216.2
Income (loss) from discontinued operations, net of income taxes	3.6	2.4	96.8	31.3
Less: earnings from discontinued operations allocated to participating securities	0.0	0.0	0.0	0.3
Income (loss) from discontinued operations attributable to common shareholders, after allocation of earnings to participating securities	3.6	2.4	96.8	31.0
Net income attributable to common shareholders, after allocation of earnings to participating securities	$ 199.3	$ 57.6	$ 528.7	$ 247.2
Weighted-average shares outstanding - basic (in shares)	108.6	116.3	111.7	115.5
Impact of dilutive securities (in shares)	0.8	1.5	0.9	1.6
Weighted-average shares outstanding - diluted (in shares)	109.4	117.8	112.6	117.1
Income from continuing operations per share	$ 1.80	$ 0.47	$ 3.87	$ 1.87
Income (loss) from discontinued operations, per share	0.03	0.02	0.87	0.27
Net income, per share	1.84	0.50	4.73	2.14
Income from continuing operations, per share	1.79	0.47	3.84	1.85
Income (loss) from discontinued operations, per share	0.03	0.02	0.86	0.26
Net income attributable to common shareholders (in usd per share)	$ 1.82	$ 0.49	$ 4.70	$ 2.11