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Shareholder's Equity - Summary of Activity of Common Stock Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions			3 Months Ended		12 Months Ended
	Feb. 24, 2020	Nov. 18, 2019	Jan. 03, 2021	Dec. 29, 2019	Sep. 30, 2020
Equity, Class of Treasury Stock [Line Items]
Number of Shares Repurchased (in shares)			0.6	3.2
Average Price Per Share (in dollars per share)			$ 65.27	$ 61.92
Amount			$ 42.3
Treasury Stock
Equity, Class of Treasury Stock [Line Items]
Amount			$ 42.3	$ 196.9
Open Market Purchases
Equity, Class of Treasury Stock [Line Items]
Number of Shares Repurchased (in shares)			0.0	1.3
Average Price Per Share (in dollars per share)			$ 0	$ 62.06
Open Market Purchases | Treasury Stock
Equity, Class of Treasury Stock [Line Items]
Amount			$ 0.0	$ 81.4
Private Purchases
Equity, Class of Treasury Stock [Line Items]
Number of Shares Repurchased (in shares)			0.6	0.2
Average Price Per Share (in dollars per share)			$ 65.27	$ 62.30
Private Purchases | Treasury Stock
Equity, Class of Treasury Stock [Line Items]
Amount			$ 42.3	$ 9.2
ASR
Equity, Class of Treasury Stock [Line Items]
Number of Shares Repurchased (in shares)	0.3	1.7	0.0	1.7	2.0
Average Price Per Share (in dollars per share)			$ 0	$ 61.79	$ 61.59
Amount	$ 18.5	$ 106.3		$ 125.0
ASR | Treasury Stock
Equity, Class of Treasury Stock [Line Items]
Amount			$ 0.0	$ 106.3

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Total cost of shares repurchased divided by the total number of shares repurchased.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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