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Shareholder's Equity - Narrative (Details) - USD ($) $ / shares in Units, shares in Millions				3 Months Ended		12 Months Ended
	Feb. 24, 2020	Nov. 18, 2019	Jul. 24, 2018	Jan. 03, 2021	Dec. 29, 2019	Sep. 30, 2020
Subsidiary, Sale of Stock [Line Items]
Common stock repurchase program, approved amount			$ 1,000,000,000
Common stock repurchase program, authorization period			36 months
Shares repurchased (in shares)				0.6	3.2
Repurchase amount, fair value				$ 42,300,000
Average cost per share (in dollars per share)				$ 65.27	$ 61.92
ASR
Subsidiary, Sale of Stock [Line Items]
Repurchase payment		$ 125,000,000.0
Shares repurchased (in shares)	0.3	1.7		0.0	1.7	2.0
Percentage of total shares		85.00%
Repurchase amount, fair value	$ 18,500,000	$ 106,300,000			$ 125,000,000.0
Reduction to additional paid-in capital		$ 18,700,000
Average cost per share (in dollars per share)				$ 0	$ 61.79	$ 61.59

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Adjustments to Additional Paid in Capital, Reduction

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